Need help with motor..should i rebuild??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Will67 · 01-25-2003, 12:40 AM

Im new to these trucks..but i know a little..but nothin to much about motors..mines a 250 or a 292..cant go get the number to find out till the snow melts...it knocks..but my dad said its knocked for yrs...i wanna a little more power but not a speed demon..well i guess that wouldnt be bad but...well im on a limited budget..im only 15...is there ne cheap way to fix a knock...ne ideas on how to get more power..or should i just go with a rebuild..if so whats a good kit..or is it cheaper to get all the parts seperate...too many questions..ahhh..
Thanks, Will

Dads72 · 01-25-2003, 12:47 AM

When does it knock?
At idle? At slow speeds? Or at WOT?
If it only knocks at WOT, maybe you need some better gas.
Could be a timing/ignition problem.

Will67 · 01-25-2003, 12:50 AM

It seems to stop knockin if i drive it alot in a couple days...when i rev it up it quits knockin totally...it knocks mainly at idle..when it knocks..someone recommended changin the oil and putting lucus in it...

Dads72 · 01-25-2003, 01:00 AM

Warm it up and change the oil and filter.
This will eliminate a variable.
Valvoline is what I always use, but others will have different opinions.
A knock at idle isn't what I think of as being a knock.
To me, knock means detonation, and that's not good.
A "tick" at idle could mean a sticking lifter, or --
Take a good look at your exhaust manifold gaskets.
Sorry. How the hell do you look at them?
Spend a couple of bucks and install new ones.
See if the "knock" at idle goes away.
All the best.
Paul

Will67 · 01-25-2003, 01:02 AM

Thanks..ill try that...what would u recommend doin to give me more power...like i said not a lot but u know somethin i can brag a little about..haha

Dads72 · 01-25-2003, 01:21 AM

The first step in getting more power is to get what you have working correctly.
You don't have that yet.
Change the oil and filter. Replace the exhaust manifold gaskets. If the "knock" is still there, you need to keep asking questions until it's fixed.
Remember, those were only my suggestions. Lots of other people on this list know a lot more than I do.
Get what you have working correctly. Then go for the upgrade stuff.
"Patience, Grasshopper"
Jeesh! I sound old.

Will67 · 01-25-2003, 01:24 AM

ok..get what i have running correctly first...it makes it hard to have patience when everytime i start to work on my truck it snows 5 inches or something..ahhhh..lol...i sound like a whiner now..lol..what about mixing lucus with my oil when i change it..does that stuff work or do u know

Dads72 · 01-25-2003, 01:42 AM

We have to stop meeting like this.

I've never been a fan of oil additives, but others may feel differently.
Warm it up, change the oil and filter, replaced the exhaust manifold gaskets and see what happens.
You can always add stuff to the oil afterwards if you want.
Here's a trick that really works. Get (beg, borrow, steal) a chunk of old radiator hose - a section of garden hose would work.
Put it up to your ear and poke the other end around in there. You'll be able to hear where your knock is coming from.
Just keep your head out of the fan.
All the best.
Paul

Will67 · 01-25-2003, 11:20 AM

I think i have some hose layin in the corner of the yard..lol...I cant do much now..snow...ill change the oil and everything next weekend..if there is no snow...o and i need a battery..my neighbor stole it..hahaha.....well thanks for the help..if this doesnt work..ill post again

special70gmc · 01-25-2003, 05:54 PM

just do what they say thats what ive learned lol im only 16 so im the same boat as you no money and all but i got an idea ask your dad when the last time he adjusted the valves. cant overlook the simple things. -kyle

Will67 · 01-25-2003, 08:28 PM

Well im sure my dad did nothing to it..he parked it in my grandpas field..and it sat there for like 3 and a half yrs...but then i came along and got it started..lol...i dont think it was worked on much cus in the glove box it says last oil change was in 76...lol i dont know if thats true or not..so im gonna change the oil and see what happens from there...

dwaite72lnghrn · 01-25-2003, 10:58 PM

Start with the oil change, Listen for the noise with the hose, Check wires for damage, Do you have an inductive pickup timing light run down all the wires and make sure they are all firering. Nocking sound at idle could be bearings in the water pump, alternator. Ticking at idle could be exhaust leak at the manifold or lead pipe gasket. So when you are under there look for Black marks on all the exhaust pipe connections if there is might be a leak.
What year/size truck is it? Transmission?

Will67 · 01-25-2003, 11:17 PM

The truck is a 67 c10...the tranny is a 2 speed powerglide...

Will67 · 01-26-2003, 09:25 PM

tttt

01-25-2003, 12:40 AM	#1
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	Need help with motor..should i rebuild??? Im new to these trucks..but i know a little..but nothin to much about motors..mines a 250 or a 292..cant go get the number to find out till the snow melts...it knocks..but my dad said its knocked for yrs...i wanna a little more power but not a speed demon..well i guess that wouldnt be bad but...well im on a limited budget..im only 15...is there ne cheap way to fix a knock...ne ideas on how to get more power..or should i just go with a rebuild..if so whats a good kit..or is it cheaper to get all the parts seperate...too many questions..ahhh.. Thanks, Will

01-25-2003, 05:54 PM	#10
special70gmc Registered User Join Date: Sep 2002 Location: long island, new york Posts: 1,333	just do what they say thats what ive learned lol im only 16 so im the same boat as you no money and all but i got an idea ask your dad when the last time he adjusted the valves. cant overlook the simple things. -kyle __________________ 1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door

01-25-2003, 10:58 PM	#12
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Start with the oil change, Listen for the noise with the hose, Check wires for damage, Do you have an inductive pickup timing light run down all the wires and make sure they are all firering. Nocking sound at idle could be bearings in the water pump, alternator. Ticking at idle could be exhaust leak at the manifold or lead pipe gasket. So when you are under there look for Black marks on all the exhaust pipe connections if there is might be a leak. What year/size truck is it? Transmission? __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

01-25-2003, 12:47 AM	#2
Dads72 Registered User Join Date: Nov 2002 Posts: 427	When does it knock? At idle? At slow speeds? Or at WOT? If it only knocks at WOT, maybe you need some better gas. Could be a timing/ignition problem.

01-25-2003, 12:50 AM	#3
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	It seems to stop knockin if i drive it alot in a couple days...when i rev it up it quits knockin totally...it knocks mainly at idle..when it knocks..someone recommended changin the oil and putting lucus in it...

01-25-2003, 01:00 AM	#4
Dads72 Registered User Join Date: Nov 2002 Posts: 427	Warm it up and change the oil and filter. This will eliminate a variable. Valvoline is what I always use, but others will have different opinions. A knock at idle isn't what I think of as being a knock. To me, knock means detonation, and that's not good. A "tick" at idle could mean a sticking lifter, or -- Take a good look at your exhaust manifold gaskets. Sorry. How the hell do you look at them? Spend a couple of bucks and install new ones. See if the "knock" at idle goes away. All the best. Paul

01-25-2003, 01:02 AM	#5
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	Thanks..ill try that...what would u recommend doin to give me more power...like i said not a lot but u know somethin i can brag a little about..haha

01-25-2003, 01:21 AM	#6
Dads72 Registered User Join Date: Nov 2002 Posts: 427	The first step in getting more power is to get what you have working correctly. You don't have that yet. Change the oil and filter. Replace the exhaust manifold gaskets. If the "knock" is still there, you need to keep asking questions until it's fixed. Remember, those were only my suggestions. Lots of other people on this list know a lot more than I do. Get what you have working correctly. Then go for the upgrade stuff. "Patience, Grasshopper" Jeesh! I sound old.

01-25-2003, 01:24 AM	#7
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	ok..get what i have running correctly first...it makes it hard to have patience when everytime i start to work on my truck it snows 5 inches or something..ahhhh..lol...i sound like a whiner now..lol..what about mixing lucus with my oil when i change it..does that stuff work or do u know

01-25-2003, 01:42 AM	#8
Dads72 Registered User Join Date: Nov 2002 Posts: 427	We have to stop meeting like this. I've never been a fan of oil additives, but others may feel differently. Warm it up, change the oil and filter, replaced the exhaust manifold gaskets and see what happens. You can always add stuff to the oil afterwards if you want. Here's a trick that really works. Get (beg, borrow, steal) a chunk of old radiator hose - a section of garden hose would work. Put it up to your ear and poke the other end around in there. You'll be able to hear where your knock is coming from. Just keep your head out of the fan. All the best. Paul

01-25-2003, 11:20 AM	#9
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	I think i have some hose layin in the corner of the yard..lol...I cant do much now..snow...ill change the oil and everything next weekend..if there is no snow...o and i need a battery..my neighbor stole it..hahaha.....well thanks for the help..if this doesnt work..ill post again

01-25-2003, 08:28 PM	#11
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	Well im sure my dad did nothing to it..he parked it in my grandpas field..and it sat there for like 3 and a half yrs...but then i came along and got it started..lol...i dont think it was worked on much cus in the glove box it says last oil change was in 76...lol i dont know if thats true or not..so im gonna change the oil and see what happens from there...

01-25-2003, 11:17 PM	#13
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	The truck is a 67 c10...the tranny is a 2 speed powerglide...



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01-26-2003, 09:25 PM	#14
Will67 Registered User Join Date: Jan 2003 Location: Lebanon MO Posts: 57	tttt

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