Had to replace valve stem seals on L27? - 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 04-12-2008, 04:11 PM   #11
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Quote:
Originally Posted by sandrock
Without looking at that topic, was it you or Curt that used zip ties to keep the valves in the heads? That'* a slick trick.
Probably willwren...I use pieces of masking tape on the valve stems to keep them in place and in the right bore while working on a head while it'* off the motor.
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Old 04-12-2008, 04:19 PM   #12
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For the 1994-1995 L27 and L67 model years there were some issues with the valve stem seals and in some cases it was found to cause some spark knock as well as fouling out plugs...

We know its an issue on Brads car... But before its ever a real problem he'll be at 200K

But none the less this was an issue for the 94-95 L27'*.. 90-93 L27'* and L67'* did not suffer from this..

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Old 05-17-2008, 03:25 PM   #13
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Default Losing about 1qt/1000mi

I'm losing about 1 quart per thousand miles if I keep the level high, but it tapers off as the level drops. Is that normal for these valve stem seals?

I just replaced plugs, no fouling found. MPG is 22-24. Maybe I don't need to worry about it?

Thanks for all the great pics and tips. You guys are on top of it!
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Old 05-17-2008, 05:23 PM   #14
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Default Tools

To be clear:

The necessary tools are:

1. compressed air with fitting OR string/rope to hold valves up
2. spring compressor tool shown in clm2112'* picture
3. magnetic wand
4. tiny screwdriver
5. hemostats or needlenose pliers
6. Wrenches for valve covers
7. fine, lint free rags to cover oil passages

Also new gaskets

6 hours

at least 3 beers

Does that cover it?

--notagrampa
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