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knocking noise


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greasemonkey41
New User

Jul 22, 2009, 4:15 PM

Post #1 of 3 (1378 views)
post icon knocking noise Sign In

hello first time on this site.... just picked up a 79 chevy dually engine has a loud knocking noise at start up at idle but goes away after. where should I begin?


Sidom
Veteran / Moderator
Sidom profile image

Jul 22, 2009, 6:03 PM

Post #2 of 3 (1366 views)
Re: knocking noise Sign In

I would start with the basics..... compression & leakdown test if the compression is off... Without hearing it, it could be a lot of things...... Some of those were good for piston slap..... This is a 30 year old truck we are talking about....Wink

If it's not to severe & your gonna drive it..... Do all the maintance stuff to it so you know we your at mileage wise......


greasemonkey41
New User

Jul 23, 2009, 3:24 AM

Post #3 of 3 (1358 views)
post icon Re: knocking noise Sign In

thanks for the reply. Its a 454, I was told it may be a rod, I was hoping it was minor.






 
 
 






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