lifter? push rod? something else? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-10-2010, 10:43 AM   #11
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ya good point well how hard you it be to take the heads off? it would be cheaper for me that way if i just took them off and looked
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Old 04-10-2010, 10:50 AM   #12
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I think I paid about $25 for my compression tester.

Here it is. http://cgi.ebay.com/Automotive-MOTOR...item4cee97a220

The head gaskets alone would cost more then that.
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Old 04-10-2010, 02:08 PM   #13
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would you have to replace the head gasket?

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Old 04-11-2010, 09:45 AM   #14
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ok ive been thinking about it more and a chiped piston doesnt realy make sence to me it has to be something witha the valve train cuz when you not boosting or min boost its fine when you go wot it knocks louder and hesitant and doesnt go any where. a i dont think a chiped piston would slow down the car at all at lest in my head but i dont know that much about motors
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Old 04-11-2010, 11:16 AM   #15
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I would pull the valve covers and inspect the valve springs. I worked on a car a while back that had under load issues. It passed every test we threw at it including a compression test. We found a broken valve spring on #6
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Old 04-11-2010, 11:38 AM   #16
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i just got back from advanced so im leting my motor cool down a bit before i look at the back i looked at the front it looked fine to me started it with the valve cover of nothin realy noticable but it sounds like the sounds coming from above the number 1 cylinder
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Old 04-11-2010, 11:44 AM   #17
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See if you can wiggle that rocker. If you have a bent push rod or a bad lifter the rocker will feel loose.
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Old 04-11-2010, 02:29 PM   #18
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well i looked at all the back plugs they where all fine, had both valve covers off looked at them both running didnt look like anything was wrong and i made sure all the rocker arms are tight checked all the springs they were fine. took it for a drive and it was actualy accelerating under boost till last gear or second to last gear its bogged down. i love this car but i wana just through it in the trash im done for today or i actualy will

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Old 04-11-2010, 02:32 PM   #19
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OK, so refresh us on the problem here. Does it stutter under WOT? But runs OK otherwise? If so, coils. Even if they test OK, they may still be the problem.
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Old 04-11-2010, 02:42 PM   #20
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it seems to bog down in higher gears at wot and it does run fine other wise. the coils were replace not that long ago but its possible i could have gotten a bad one but could the plate they sit on be bad? i do have a spare one of thoughs. but they what would the ticking noise be? and the metal shavings? my brother said it mite be a bad connecting rod but i dont think it would make that kind of tick
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