L59 fuel question - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gringoloco · 05-09-2012, 02:08 PM

Cannot reuse head bolts on these motors. They are one time use, torque to yield, stretch fasteners. Same for the crank snout/balancer...
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faribran · 05-14-2012, 09:17 AM

but you can pull a spark plug and shine a flashlight in the hole to see if the top of the piston is flat or dished. Flat is 5.3, dished is 4.8.
__________________
?? opposite ??

ls1nova71 · 05-14-2012, 01:11 PM

Quote:

Originally Posted by faribran

but you can pull a spark plug and shine a flashlight in the hole to see if the top of the piston is flat or dished. Flat is 5.3, dished is 4.8.
__________________
?? opposite ??

Actually you're right it is the opposite. My old age is catching up with me!

osaltyone · 05-18-2012, 11:39 PM

I can't see anything but black when I put the light in the spark plug hole. Spent a few hours putting the engine on the frame and ...

found this today

Is this is the tab you mentioned before?

Quote:

Originally Posted by gringoloco

Check the head gasket tab to verify displacement. It will be stamped with 4.8, 5.3, 6.0...

I think I am going to call the guy tomorrow and talk to him. Things are not adding up. I will tell him I will be pulling the head to see if it is a 4.8 or 5.3. The computer came back as a 2006 tahoe with a 4.8 that was salvaged, which he says he just pulled off the shelf, and the vin he gave me was for a 2006 Tahoe, but the mileage did not match what he said. He said it was just under 58k and the vin says last reqistered in Ohio at 23k, nothing about a salvage.

osaltyone · 05-18-2012, 11:42 PM

Does this look like a windage tray from a truck that had 23 or 58k miles on it? Pulled the pan, windage and pickup to put a LS1 pan on.

85burb · 05-18-2012, 11:46 PM

On the back of the motor there should be 4.8 and 5.3 stamed in to it. There will be an paint mark one the displacement it is

usmcchevy · 05-19-2012, 11:51 AM

I haven't seen a motor that the head gaskets were wrong. No tabs or not stamped, yes. What numbers can you find on the crank? Those will tell what you have for sure.

BR3W CITY · 05-19-2012, 01:58 PM

At this point just call the guy, even if it MIGHT be what you thought you wanted....sounds like he isn't the most legit guy anyway.

ls1nova71 · 05-19-2012, 06:06 PM

Quote:

Originally Posted by usmcchevy

I haven't seen a motor that the head gaskets were wrong.

Do you have a pic of one stamped 5.3? I checked 4 of mine and they all say 4.8, but I know the truck that at least one of them came out of was a 5.3.

usmcchevy · 05-19-2012, 10:50 PM

Quote:

Originally Posted by ls1nova71

Do you have a pic of one stamped 5.3? I checked 4 of mine and they all say 4.8, but I know the truck that at least one of them came out of was a 5.3.

Nope, Let me rephrase. I have not personally seen one that was stamped wrong.

ls1nova71 · 05-20-2012, 09:43 AM

I was just thinking that since a 4.8 and 5.3 use the same block and bore size that the head gaskets would be the same also.
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osaltyone · 05-20-2012, 02:01 PM

Talked to the guy today and he says it is a 5.3 to pull the head and see. Says he does not have a 4.8 in the yard... Got to figure out how to start this thing b4 I pull the heads. Where can I get one of those starter buttons to hook up to this? I am pretty much ready to fire it up, make sure it runs then I can pull the head.

Harness was rewired, PCM was flashed (will need a crank relearn).

osaltyone · 05-21-2012, 02:32 AM

Quote:

Originally Posted by usmcchevy

I haven't seen a motor that the head gaskets were wrong. No tabs or not stamped, yes. What numbers can you find on the crank? Those will tell what you have for sure.

According the the crank #'s it is a 5.3, so I am not pulling the heads quite yet. I don't want to spend the cash on the gaskets and bolts if I don't have to.
12552216 are the #'s I see.

mooseknuckles · 05-21-2012, 10:04 AM

....are the blocks not stamped with the displacement on the front cyl, like the 6.0l??

ls1nova71 · 05-21-2012, 11:28 AM

Quote:

Originally Posted by mooseknuckles

....are the blocks not stamped with the displacement on the front cyl, like the 6.0l??

They have both 4.8 and 5.3 cast into them because they use the same block, and as mentioned earlier there is usually a white paint mark on which ever one it is.

mooseknuckles · 05-21-2012, 03:09 PM

Quote:

Originally Posted by ls1nova71

They have both 4.8 and 5.3 cast into them because they use the same block, and as mentioned earlier there is usually a white paint mark on which ever one it is.

gottcha...

solidaxel · 01-31-2013, 06:32 PM

So how did the story end !!!!

osaltyone · 02-02-2013, 02:53 AM

Quote:

Originally Posted by solidaxel

So how did the story end !!!!

Never was able to get the true mileage on the motor. I have about 200miles on it now. There are always the little things you have left, but the swap is complete for now.

I have to say I would do it again on my next project. This motor runs circles around the old tired 305 that was in it. I couldn't have done it without all the help from this forum though. Thanks! I learned a lot on this one.

solidaxel · 02-02-2013, 08:03 AM

Well, thanks for bringing us up to date!!
Why are you not putting more miles on your ride?
These hotrods were made to drive, with all the work and money we throw at them !

osaltyone · 02-02-2013, 11:27 PM

Quote:

Originally Posted by solidaxel

Well, thanks for bringing us up to date!!
Why are you not putting more miles on your ride?
These hotrods were made to drive, with all the work and money we throw at them !

I built it as my project, to see if i could do it on my own.it's not my daily driver. The bench seat won't fit my family.
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05-09-2012, 02:08 PM	#26
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,921	Re: L59 fuel question Cannot reuse head bolts on these motors. They are one time use, torque to yield, stretch fasteners. Same for the crank snout/balancer... Posted via Mobile Device __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

05-14-2012, 09:17 AM	#27
faribran Registered User Join Date: Jul 2005 Location: AL Posts: 1,828	Re: L59 fuel question but you can pull a spark plug and shine a flashlight in the hole to see if the top of the piston is flat or dished. Flat is 5.3, dished is 4.8. __________________ ?? opposite ?? __________________ "

05-18-2012, 11:42 PM	#30
osaltyone Registered User Join Date: Jun 2009 Location: Corona, ca Posts: 406	Re: L59 fuel question Does this look like a windage tray from a truck that had 23 or 58k miles on it? Pulled the pan, windage and pickup to put a LS1 pan on.

05-18-2012, 11:46 PM	#31
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: L59 fuel question On the back of the motor there should be 4.8 and 5.3 stamed in to it. There will be an paint mark one the displacement it is __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

05-19-2012, 11:51 AM	#32
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: L59 fuel question I haven't seen a motor that the head gaskets were wrong. No tabs or not stamped, yes. What numbers can you find on the crank? Those will tell what you have for sure. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

05-19-2012, 01:58 PM	#33
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: L59 fuel question At this point just call the guy, even if it MIGHT be what you thought you wanted....sounds like he isn't the most legit guy anyway. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

05-20-2012, 09:43 AM	#36
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: L59 fuel question I was just thinking that since a 4.8 and 5.3 use the same block and bore size that the head gaskets would be the same also. Posted via Mobile Device __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

05-20-2012, 02:01 PM	#37
osaltyone Registered User Join Date: Jun 2009 Location: Corona, ca Posts: 406	Re: L59 fuel question Talked to the guy today and he says it is a 5.3 to pull the head and see. Says he does not have a 4.8 in the yard... Got to figure out how to start this thing b4 I pull the heads. Where can I get one of those starter buttons to hook up to this? I am pretty much ready to fire it up, make sure it runs then I can pull the head. Harness was rewired, PCM was flashed (will need a crank relearn).

05-21-2012, 10:04 AM	#39
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: L59 fuel question ....are the blocks not stamped with the displacement on the front cyl, like the 6.0l?? Attached Images __________________ my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682

01-31-2013, 06:32 PM	#42
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: L59 fuel question So how did the story end !!!! __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

02-02-2013, 08:03 AM	#44
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: L59 fuel question Well, thanks for bringing us up to date!! Why are you not putting more miles on your ride? These hotrods were made to drive, with all the work and money we throw at them ! __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42



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