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#1
02-05-2004, 09:18 PM
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Ring job or replace
I have a 1990 GMC Sierra K2500 with a 5.7 Mr. Goodwrench engine. #3 cylinder is pumping oil. About a quart every 50-60 miles. I'm not a mechanic but I can only think of two reasonable options, #1 Pull head replace rings, #2 replace with a used moter. Which is the most cost effective? Or are there other options. I'm a shade tree mechanic ( very little mechanical knowledge. I've replaced starters, radiators,window motors and that's about it).
Thanks TJ 
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#2
02-06-2004, 09:01 AM
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Re: Ring job or replace
Smartest thing is to find out where the oil is coming from.
It may be something as simple as a split valve stem seal.
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#3
02-10-2004, 12:09 AM
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Re: Ring job or replace
Do a compression check, its an easy decision maker.
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#4
02-20-2004, 01:35 AM
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Re: Ring job or replace
a used motor would be easier. if you do put in a used replace the rear oil seal before installing it. if you do have a bad valve seal it's an easy fix. i agree with herefordman compression tells all
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#5
02-17-2005, 08:37 PM
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Compression, How Much it too little??
Just wondering if anybody has any info on how low it can go... Compression that is. I have a 95 sierra 4x4 1500 5.7 tbi. When I ran a compression check ( to figure out a loping problem) I found that all 8 are between 128-140.. The engine uses no oil and has great power. The body is super with no rust ( New England Miracle) I'm hoping to get many more years out of it.
I think that I have solved the loping problem thanks to this site. It was skipping/hesitating just off idle 1100-1500 rpms I finally just plugged the egr line and it seems to have taken care of it. After Fuel pump, filter, tps, MAP, Plugs, Wires, Cap, Rotor, Junkyard TBI..... Wish I had found this site earlier... Anybody need a Good TBI??? I guess I'll just need a new EGR unless it turns out to be the actuator, can they be checked? I tried Vacuum on the EGR with my handheld vacuum pump, it seems to take some vacuum and then bleed off slowly, I then looked at some new egr's online and one had a note next to it " can not test with vacuum" WTF? How can I be sure mine is or isn't bad?? Thanks for the help and sorry for the rambling.. CHris
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