Bosch O2 - Follow up - 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 06-18-2005, 08:17 PM   #1
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Default Bosch O2 - Follow up

Thanks for the tips!

Your correct, oil leaks. Did miss the LIM bolt under the SC bypass, but found it when I couldn't tear the top off the engine . There'* a bolt on the back corner, opposite the SC bypass, under a sensor (I think it'* the ECT), that I took off with an open wrench. I wanted to ask advice on pulling the sensor. Anything to it, isn't mentioned in the SM. Does it need anything for the threads on replacement?

Will be doing all the other work you mention, using Fel-Pro gaskets, 180 thermostat, Autolite 605 plugs, Taylor wires, etc. Other than disconnecting a fair amount wires and hoses, it'* going pretty smoothly. I did pick up a Chilton #28200, much better than the Haynes. Have a bid in on Ebay for the FSM'*, nobody better clothes-line me . I've got the LIM and VC'* off. The rear VC had more grime on the inside and looked more baked then the front, as did the rockers to a lesser extenet. Is this a normal thing or is it an indication of a problem?

I've been using Mobil 1. I know synthetics are thinner then regular oil. Will this hassen leaks? What oil'* do most use?

On cleaning the TB. Should the gasket be replaced? And is Valvoline TB cleaner a good choice?

Hope this isn't aking for too much info, but you guys know your stuff and I like doing it right!

Thanks again
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Old 06-20-2005, 01:03 AM   #2
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As for the TB gasket, if you haven't replaced it yet, do so. The new ones are much improved and are reusable.

For TB cleaner, i say just remove all the sensors then use whatever solvent you want, from carb cleaner to gasoline, but let it dry before installing the sensors.
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Old 06-20-2005, 01:12 PM   #3
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FSM'* if someone snipes you...check out www.helm.com I picked up mine for about $60 including a new owners manual for my car.
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Old 06-20-2005, 04:03 PM   #4
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Yep, I got jumped. Was outside working on the car, came in and was out bid. So it goes...
I'll check out your sire, thanks.
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