99 Tahoe Vortec 5.7 Problem

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99 Tahoe Vortec 5.7 Problem

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99 Tahoe Vortec 5.7 Problem - 11/14/2007 5:14:33 PM

yelo69

Posts: 1
Joined: 11/14/2007
Status: offline

Hi all.

My wife has a 99 tahoe (350) vortec 5.7. When starting in the morning or after it sets all day, there is a loud tick sounding almost like a collapsed lifter. Seems after vehicle warms up a little while it stops almost as if it has pumped up. I removed, flushed and changed the oil. It eliminated the problem for a little while and now it is getting cold out and it has started again doing the same as above.

My question is this: Are collapsed lifters a common problem with a vortec? If not, has anyone experienced anything like this?

Any thoughts on this??

Thanks

Andy

Post #: 1

RE: 99 Tahoe Vortec 5.7 Problem - 11/14/2007 5:36:04 PM

DAVID L. PAUL

Posts: 62
Joined: 11/2/2007
Status: offline

could just be varnish buildup or mabe a worn rocker

_____________________________

DAVID LEE PAUL

(in reply to yelo69)

Post #: 2

RE: 99 Tahoe Vortec 5.7 Problem - 11/14/2007 10:50:58 PM

Scoper50

Posts: 67
Joined: 10/14/2007
Status: offline

It couldn't hurt to try a can of restore or seafoam. I'm not really a big fan of "liquid cures", but I make an exception with those two products. They seem to do what they claim to do.

(in reply to yelo69)

Post #: 3

RE: 99 Tahoe Vortec 5.7 Problem - 1/24/2008 6:45:57 PM

therommelmann

Posts: 2
Joined: 1/24/2008
Status: offline

I have a similar problem if not the same problem and I finally found a solution.
http://www.pistonslap.com/
Hopefully that helps

(in reply to Scoper50)

Post #: 4

RE: 99 Tahoe Vortec 5.7 Problem - 2/14/2008 8:23:34 AM

f2foxes2001

Posts: 1
Joined: 2/14/2008
Status: offline

Had the same problem on my 96 5.7L. Went to a heavier weight motor oil to give it a short term fix, but eventually pulled the motor. Worked for about 1 month and then start the embarrassing knocking and ticking. My mechanic advised me that the engine was toast. Wish I had seen this issue on Piston Slap prior to spending money on a new engine or at least, I could have had GM pay for my engine.

(in reply to therommelmann)

Post #: 5