The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-22-2020, 08:27 PM   #26
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

If the dumbell (barbell) is leaking the capillary reading at the factory location will be low...

Changing the oil filter for a new one removes the possibility of a clogged oil filter causing a large pressure drop...

If its still low at the factory port after changing the filter then the barbell is either missing or installed backwards or lacks the O ring...

__________________
Family and country before all others...

2006 Chevy Silverado (Daily Driver)
2012 Chevy Equinox

AussieinNC is offline   Reply With Quote
Old 06-22-2020, 08:29 PM   #27
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Aha! Eureka!
I understand the dumbbell and how it works!
Thanks for the education.
Attached Images
 
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-22-2020, 08:48 PM   #28
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

If you need to remove the rear cover, here is the link to the rear seal guide...you will need this to replace the cover without tearing up the seal....

https://www.summitracing.com/parts/s...iABEgIOPPD_BwE

Here is a youtube on the repair process. In the video, you can see the end of the barbell on drivers side back lower face between lowest bolt and second lowest bolt...you can also see how any leak from the barbell goes direct to the sump of the engine.

https://www.youtube.com/watch?v=bAksGbJ11Kw

and finally, here is the cover and seal set from Dorman

https://www.summitracing.com/parts/r...SABEgI5CvD_BwE

Here is the barbell unit if its missing

https://www.summitracing.com/parts/icb-551284

__________________
Family and country before all others...

2006 Chevy Silverado (Daily Driver)
2012 Chevy Equinox

AussieinNC is offline   Reply With Quote
Old 06-22-2020, 09:01 PM   #29
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Wow! Great video. Thanks.
I wish all videos were that clear and concise. Watching it was painless. Too many YouTube DIY vids are poorly produced and painful to watch.

That might take me 1.5 hours to complete. Not sure why they listed 5 hours.
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-23-2020, 06:53 AM   #30
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

I would assume the 5 hours includes the removal and replacement time of the engine from the vehicle...

Enjoy your day...

__________________
Family and country before all others...

2006 Chevy Silverado (Daily Driver)
2012 Chevy Equinox

AussieinNC is offline   Reply With Quote
Old 06-23-2020, 07:56 AM   #31
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Some may wonder how I got started with this swap.
My son is a mechanic and has always encouraged me to get rid of my great running 230ci. I resisted for years.

I finally gave in when I saw a FB marketplace ad for this engine.
The seller had a garage full of rebuilt 5.3 engines listed at $2199. He rebuilt maybe 15 engines. They were selling well.
I bought his last one at a discounted price of $1200. It needed accessories and brackets and a throttle body but was otherwise a complete engine.

The seller said he had worked for Toyota building engines, then later had a shop of his own and had built many more and also helped customers complete LS swaps. He was polite, knowledgeable, helpful and lived in a local rural neighborhood where he had already poured a concrete slab for a new shop. Not someone trying to unload an engine stored under a tarp.

I pulled the trigger.

Many I’ve talked to have purchased running LM7s for half of what I paid. I know I didn’t get the “best deal in town”, but the price seemed fair for all the time and work already in the engine. My area of the country seems to have a shortage of these engines. The local salvage yard gets one every other week at best and they are usually a total mess.

Six months later I have the engine on a run stand, and here we are. I was hoping (planning actually) to fire this thing up and have it in my truck by September. Not looking too good right now.
Attached Images
   
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.

Last edited by Lugnutz65; 06-23-2020 at 08:21 AM.
Lugnutz65 is offline   Reply With Quote
Old 06-23-2020, 08:15 AM   #32
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Know knowing this, I'd be calling him up and asking questions...maybe he'll stand behind his work..
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 06-23-2020, 10:00 AM   #33
clay68c10
Senior Member
 
clay68c10's Avatar
 
Join Date: Aug 2004
Location: Centennial, CO
Posts: 2,991
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Don’t worry too much about those compression numbers. You have some oil in there from the PCV situation combined with (probably) new rings that haven’t seated yet. Really, the low end of those numbers are close to the factory spec. I recall it being around 150-175psi
Get it running with a reliable oil pressure gauge first.
__________________
ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO
http://67-72chevytrucks.com/vboard/s...d.php?t=788602
93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday...
05 Jeep Wrangler Unlimited. 3” lift & 6-speed
02 E320 the insurance total “free car”
13 Tahoe LTZ
clay68c10 is offline   Reply With Quote
Old 06-23-2020, 11:46 AM   #34
87chevy.com
BMW & ASE Master Certified
 
87chevy.com's Avatar
 
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,266
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Oil burning is a blueish color ... white could be fuel or coolant
__________________
1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes
1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit

New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD

A poor man buy's it twice

finally got my domain name back, 87chevy.com.... site rework in progress
87chevy.com is offline   Reply With Quote
Old 06-23-2020, 08:16 PM   #35
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Quote:
Originally Posted by 87chevy.com View Post
Oil burning is a blueish color ... white could be fuel or coolant
My first post was BEFORE I realized that oil was accumulating inside my intake. The smoke clears quickly after startup. If I sop up the oil inside the intake, there’s essentially no smoke.

My next step is to figure out where the oil is coming from. Votes favor the PCV system due to blow by and high crankcase pressure from rings that aren’t seated properly. The blow by would also explain why my fresh oil is black with carbon with less than 20 minutes of run time.

Votes are less in favor for oil coming back up through the cathedral ports. That would mean bad valve stem seals and possibly bad rings too.

I’m no expert. I drained the oil right after I saw the smoke and there is zero coolant in the oil and no oil in the coolant.
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-25-2020, 09:40 PM   #36
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Update!
It’s the PCV alright!
Looks like I have a bad OE oil pressure sensor too. I swapped it out for a capillary tube style gauge and now it closely matches my electric style oil sensor that’s installed near the oil filter.

Here’s a video of tonight’s test. After a few minutes at idle RPMs I didn’t get any oil in the catch can. Higher RPMs (3000) for a minute or two caused obvious oil to come through the PCV. VIDEO LINK
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-26-2020, 12:15 AM   #37
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Good deal.!!
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 06-26-2020, 12:19 AM   #38
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Quote:
Originally Posted by mongocanfly View Post
Good deal.!!
It’s good that I found a bad oil pressure sensor.
It’s bad that I have oil coming through the PCV!
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-26-2020, 01:11 AM   #39
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

I didnt watch till the end....I thought you had it...
So I went back and did...
That is alot of oil in your can...did you change the pcv?
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver

Last edited by mongocanfly; 06-26-2020 at 01:16 AM.
mongocanfly is offline   Reply With Quote
Old 06-26-2020, 08:51 AM   #40
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Quote:
Originally Posted by mongocanfly View Post
I didnt watch till the end....I thought you had it...
So I went back and did...
That is alot of oil in your can...did you change the pcv?
My VC is a later design and doesn’t use the replaceable PCV that fits in the rubber grommet. I don’t think it’s a PCV failure. Seems more like blow by. I’ll do a cylinder leak down test this weekend.
Attached Images
  
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-26-2020, 10:27 AM   #41
gmc684x4
Registered User
 
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

New unseated rings my thoughts it will have some leakdown
gmc684x4 is offline   Reply With Quote
Old 06-26-2020, 05:27 PM   #42
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

You will need a new rocker cover....

Your rocker cover is a later series with the fixed orifice pcv vent....thats why you dont see a typical PCV valve...just a nipple

You can try spraying carb cleaner into the orifice after you remove the cover to try and free up the ports but it is usually a temporary fix....

Here is a link to a Dorman product...

https://shop.advanceautoparts.com/p/...E&gclsrc=aw.ds

Nowadays it pays to run an aftermarket catch can system to augment the PCV system....the link is to a fully baffled catch can setup..

https://www.addw1.com/products/chevy...smart_campaign


__________________
Family and country before all others...

2006 Chevy Silverado (Daily Driver)
2012 Chevy Equinox


Last edited by AussieinNC; 06-26-2020 at 06:27 PM.
AussieinNC is offline   Reply With Quote
Old 06-30-2020, 09:49 PM   #43
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Here’s a quick video of my leak down test. CYLINDER 5 VIDEO LINK
I pressurized the cylinders again tonight and HEARD AND FELT air at the OIL FILL HOLE and INTAKE THROTTLE BODY. If I also have leaking intake valves, then the cylinder leak down test numbers will be falsely lowered.
The plan for the weekend is to run the engine for a while and test it again when warm. I want accurate info before I ask the engine builder to remedy the problems.

Here are the leak down numbers I got last night.
The engine was COLD when I tested. It was too late to warm the engine up, because I already had the valve cover off. I have some serious problems.
#1 = 91
#2 = 76
#3 = 94
#4 = 96
#5 = 62
#6 = 61
#7 = 91
#8 = 71
Attached Images
 
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Old 06-30-2020, 10:03 PM   #44
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

wow...id be calling the man and let him know whats going on
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 06-30-2020, 10:04 PM   #45
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

Quote:
Originally Posted by Lugnutz65 View Post
Here’s a quick video of my leak down test. CYLINDER 5 VIDEO LINK
I pressurized the cylinders again tonight and HEARD AND FELT air at the OIL FILL HOLE and INTAKE THROTTLE BODY. If I also have leaking intake valves, then the cylinder leak down test numbers will be falsely lowered.
The plan for the weekend is to run the engine for a while and test it again when warm. I want accurate info before I ask the engine builder to remedy the problems.

Here are the leak down numbers I got last night.
The engine was COLD when I tested. It was too late to warm the engine up, because I already had the valve cover off. I have some serious problems.
#1 = 91
#2 = 76
#3 = 94
#4 = 96
#5 = 62
#6 = 61
#7 = 91
#8 = 71
Now you have your reason now for so much blow by....

2,5,6,and 8 are critical failure readings....hearing air in the oil filler means ring blow by...most likely broken or missing rings.....
1 and 7 are indicative the rings have not sealed to the cylinder walls.

3 and 4 are the only two close to ok...

BTW...I believe anything less than 95 is a fail....

Hearing air in the intake manifold is most likely poorly seating or burnt valves or a bad vacuum leak at base of manifold....pulling blowby air from sump into manifold.

Suggest you do not pull the engine down without discussing this with the seller....

I remember noting the absence of Rings on the parts replaced list on the Ad post...suspect they were not replaced and old ones were installed....

__________________
Family and country before all others...

2006 Chevy Silverado (Daily Driver)
2012 Chevy Equinox

AussieinNC is offline   Reply With Quote
Old 07-04-2020, 02:07 PM   #46
Lugnutz65
Registered User
 
Lugnutz65's Avatar
 
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
Re: This looks bad! Tell me the ugly truth. White smoke + oil . . .

I posted a new thread with the update. My problem may solve itself. LINK TO NEW THREAD.
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com

Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.
Lugnutz65 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:52 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com