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01-14-2011, 12:16 AM
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#1 |
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Registered User
Join Date: Jan 2011
Location: North little Rock, Arkansas
Posts: 471
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help with diagnosing a knock in my engine
I have a 1984 Chevrolet 1/2 ton c 10 with a 250cu straight six.This is an amazing find i got it for only a $100 and for the shape its crazy i have only read about these finds but the only thing i noticed wrong with it is it has a knock in the engine. It sounds like it is coming from deep like almost the bottom of the block. I thought it might be a wrist pin and i tried pulling spark plugs caps on each cylinder at a time and that had no effect on the knock. Any suggestions? or maybe it is a wrist pin and isn't the piston still moving so maybe the knock would continue? makes sense i guess i am still learning so any advice would be great
Last edited by rollin thunder; 01-14-2011 at 12:17 AM. |
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01-14-2011, 01:00 AM
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#2 |
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Registered User
Join Date: Dec 2007
Location: Nanaimo B.C.
Posts: 604
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Re: help with diagnosing a knock in my engine
do you have oil presure?
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I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! |
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01-15-2011, 12:51 AM
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#3 |
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Registered User
Join Date: Jan 2011
Location: North little Rock, Arkansas
Posts: 471
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Re: help with diagnosing a knock in my engine
yeah I have oil pressure
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02-13-2011, 07:16 PM
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#4 |
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Registered User
Join Date: Jan 2011
Location: North little Rock, Arkansas
Posts: 471
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Re: help with diagnosing a knock in my engine
[IMG]100000046668860&aid=28782#!/photo.php?fbid=150207834990771&set=a.150203861657835.28782.100000046668860&theater[/IMG]
Last edited by rollin thunder; 02-13-2011 at 07:18 PM. |
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02-13-2011, 08:38 PM
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#5 |
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Registered User
Join Date: Nov 2007
Location: Sask Canada
Posts: 1,666
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Re: help with diagnosing a knock in my engine
we had a 250 with bad piston slap sounded like a deisel motor. ran a lot of miles like that.
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Trueman |
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02-13-2011, 10:54 PM
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#6 |
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Hand Crafted C-10
 
Join Date: Aug 2006
Location: Burien, WA
Posts: 5,180
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Re: help with diagnosing a knock in my engine
Flexplate?
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02-16-2011, 07:21 PM
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#7 |
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Registered User
Join Date: Jan 2011
Location: North little Rock, Arkansas
Posts: 471
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Re: help with diagnosing a knock in my engine
as far as it being a flexplate i forgot to mention (manual, 3 speed on column) i just recently replaced the entire clutch assembly flywheel included i figured since i was taking the transmission down i might as well check everything else out and replace it. but i am going to pull the motor and have it completely rebuilt at a performance shop locally so i can wait till then to find out what it is exactly and if it is just a piston slap which i got more information from some of the shops and they all agree its probably that then im good to drive it till i pull the motor i assume. Can not wait till the truck is finished i have a lot of plans for it i will try and get some pics on this thread soon of then and now
Last edited by rollin thunder; 02-16-2011 at 07:25 PM. |
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02-17-2011, 04:06 PM
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#8 |
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Registered User
Join Date: Jan 2011
Location: North little Rock, Arkansas
Posts: 471
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Re: help with diagnosing a knock in my engine
the day we brought it home
[IMG]  [/IMG]  the same day after we washed and waxed and replaced all fluids Last edited by rollin thunder; 02-17-2011 at 04:08 PM. |
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02-17-2011, 04:10 PM
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#9 |
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Registered User
Join Date: Jan 2011
Location: North little Rock, Arkansas
Posts: 471
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Re: help with diagnosing a knock in my engine
[IMG]
 [/IMG]About a month later here... and i`m gonna go take pics of it today here in a little bit |
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| 84 truck, chevy c10, engine knock, straight six |
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