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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 06-14-2005, 01:44 PM   #1
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Default Need gasket help

Hi all. I bought a 180 thermostat for my 95 SE and I'm planning on installing it this weekend. I bought the gasket that goes on the thermostat but I had to special order the gasket for the thermostat housing...(nobody has them and a few places have said you can't get them). Anyway, the gasket came in but it lists that it'* for a 1990-1994 231 V6 VIN C, L,1. My car is a 95 with a Series II 3.8. Is the gasket the same? The part I have is a Fel-Pro 35534 and it replaces a 25535214.
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Old 06-14-2005, 01:59 PM   #2
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Default Re: Need gasket help

Quote:
Originally Posted by 95seand78z28
Hi all. I bought a 180 thermostat for my 95 SE and I'm planning on installing it this weekend. I bought the gasket that goes on the thermostat but I had to special order the gasket for the thermostat housing...(nobody has them and a few places have said you can't get them). Anyway, the gasket came in but it lists that it'* for a 1990-1994 231 V6 VIN C, L,1. My car is a 95 with a Series II 3.8. Is the gasket the same? The part I have is a Fel-Pro 35534 and it replaces a 25535214.
it is for a different for your series II. you got the wrong one, because the one you got is for series I. I dont think it will work. A gearhead will chime in soon.
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Old 06-14-2005, 01:59 PM   #3
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Default Re: Need gasket help

Most of them are the same. I think mine is off a 350 chevy. Autozone only had the o-ring, not a gasket. I had some extra'* in my tool box from either a big block or small block chevy. Trim it and it works just fine.

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Quote:
Originally Posted by 95seand78z28
Hi all. I bought a 180 thermostat for my 95 SE and I'm planning on installing it this weekend. I bought the gasket that goes on the thermostat but I had to special order the gasket for the thermostat housing...(nobody has them and a few places have said you can't get them). Anyway, the gasket came in but it lists that it'* for a 1990-1994 231 V6 VIN C, L,1. My car is a 95 with a Series II 3.8. Is the gasket the same? The part I have is a Fel-Pro 35534 and it replaces a 25535214.
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Old 06-15-2005, 04:36 PM   #4
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Ok, I went home last night and I checked the gasket vs. the housing (without taking it apart) and it looks like the housing will fit. The gasket is the typical oval shape with a little leg that sticks out. I can see the leg on the current gasket. Anyone know what'* different?
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Old 06-29-2005, 02:43 PM   #5
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I finally installed my thermostat and I just wanted to post my findings. Everything went well despite a few setbacks. The tstat housing gasket is different, Series I to Series II. The position of the bolt are offset differently in relaton to the center hole. I managed to cut the center hole out a bit and I RTV'd the heck out of it....

I also had a problem with the gasket the goes around the thermostat. I don't know if it was for a Series I or not, but the gasket that came off the old tstat has a flat edge. The one I got from the parts store, had an edge like a flush mount. I used the old gasket and just cleaned it up.

All and all nothing leaked and my temp doesn't reach 200.


Just passing it along.
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Old 06-29-2005, 02:58 PM   #6
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Glad it worked out. And just so you don't feel overly "ghetto", when I still lived at home, my Dad and I never bought gaskets for stuff like this. We just had a big sheet of gasket material. If we changed a part like a T-stat, we would just cut one ourselves out of the material. I once used a couple of layers to make valve cover gaskets for a 350 from a Caprice I drove.

Ah, the good old days when shade tree mechanicing was promoted, not discouraged....
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Old 06-29-2005, 03:47 PM   #7
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My buddy the mechanic and I did some work to the car last night. Part of it was the transmission fluid change. He told me that we were reusing the original gasket. When I asked why he told me to wait, then showed me once it was off.

Original gasket in this particular area is metal w/rubber in it. New one is just total rubber. Original was deisigned to be reused for the life of the car. I took his word for it and it'* not leaking at all...cleaned up and good to go.
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Old 06-29-2005, 04:11 PM   #8
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Quote:
Originally Posted by BillBost37
My buddy the mechanic and I did some work to the car last night. Part of it was the transmission fluid change. He told me that we were reusing the original gasket. When I asked why he told me to wait, then showed me once it was off.

Original gasket in this particular area is metal w/rubber in it. New one is just total rubber. Original was deisigned to be reused for the life of the car. I took his word for it and it'* not leaking at all...cleaned up and good to go.

That'* good to know.... A tranny filter and fluid is next on my list.
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Old 06-29-2005, 05:10 PM   #9
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Oh..having a mechanic buddy do it that has the huge collector is great. if you are doing it yourself..put down cardboard and expect to bathe in it.
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