Upper Intake Failure Supercharged Series 1 - 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 05-09-2004, 12:01 AM   #1
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Default Upper Intake Failure Supercharged Series 1

Anyone have any experience with this??
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Old 05-09-2004, 12:02 AM   #2
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nope, got a series II, sorry
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Old 05-09-2004, 12:21 AM   #3
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i am leakin radiator fluid on one side and oil on the other and i saw radiator fluid on top of the intake and it also looked like it mixed in my reservoior (spelt wrong) is my lower bearings gone since i am letting it sit over night since that is the only choice i have
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Old 05-09-2004, 12:55 AM   #4
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You don't have an upper intake, you have a supercharger! The super replaces the upper intake... You've possibly blown a head gasket. Oil is not a symptom of a banged up upper intake either.
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Old 05-09-2004, 03:02 AM   #5
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trhe head gasket was what I was trying to think of when the radiotor and oil leaked out. Now that its really coming to me, did you check the dipstick to see if your oil is mixed with anti-freeze? If not check it in the morning and see if your oil looks grey then yeah, you have a small problem.
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Old 05-09-2004, 10:37 AM   #6
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ok if i did blow the head gasket then what?
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Old 05-09-2004, 11:00 AM   #7
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Quote:
i am leakin radiator fluid on one side and oil on the other and i saw radiator fluid on top of the intake and it also looked like it mixed in my reservoior (spelt wrong) is my lower bearings gone since i am letting it sit over night since that is the only choice i have
Well first, don't worry about your lower bearings for now. It will take a little bit of time to do irreversible damage.
Don't drive it.
You will have to begin a careful teardown of the upper engine.
What mixed in what reservoir? I assume you mean oil mixed in your coolant overflow reservoir. Check your oil for coolant contamination. It will look whitish color if coolant has gotten in. If there is water in your oil then it is a head gasket.
Remember that your oil pressure is a lot higher than your coolant pressure, so most likely just the oil has gotten into the coolant and not vice versa if the leak is at the intake manifold / supercharger.
My initial guess is you have lost a seal between your supercharger and intake manifold. That has to come off first before your heads, so you may not have to go any further than taking off the supercharger without having to take off the heads.
Where exactly is the oil and coolant leaking from?
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Old 05-09-2004, 11:06 AM   #8
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If you did blow a head gasket it needs replaced. Not a light job but not technically difficult. It'* pretty labor intensive, not something i recommend if you haven't done it before. Took two people about 4 hour to do it on BADSSEI. Went something like this...

disconnect neg battery
Remove valve covers
Remove rockers
remove pushrods
remove fuel rail/injectors
remove supercharger
remove intake manifold
remove heads
replace gaskets
reverse
Flush coolant
Change oil

Mind you there was a lot of other little things at least on the series 2 like removing the alternator to get acces to the rear valve cover, removing the intake to get the SC off, etc... The above is not intended to be a walkthrough just a general overview of ome of what will be involved.
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Old 05-09-2004, 12:05 PM   #9
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Quote:
Originally Posted by 2000SilverBullet
Quote:
i am leakin radiator fluid on one side and oil on the other and i saw radiator fluid on top of the intake and it also looked like it mixed in my reservoior (spelt wrong) is my lower bearings gone since i am letting it sit over night since that is the only choice i have
Well first, don't worry about your lower bearings for now. It will take a little bit of time to do irreversible damage.
Don't drive it.
You will have to begin a careful teardown of the upper engine.
What mixed in what reservoir? I assume you mean oil mixed in your coolant overflow reservoir. Check your oil for coolant contamination. It will look whitish color if coolant has gotten in. If there is water in your oil then it is a head gasket.
Remember that your oil pressure is a lot higher than your coolant pressure, so most likely just the oil has gotten into the coolant and not vice versa if the leak is at the intake manifold / supercharger.
My initial guess is you have lost a seal between your supercharger and intake manifold. That has to come off first before your heads, so you may not have to go any further than taking off the supercharger without having to take off the heads.
Where exactly is the oil and coolant leaking from?
it jus mixed in the resorior i will take pics in a min let me get my camera phone and show u
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Old 05-09-2004, 12:29 PM   #10
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Well if you have oil in your coolant its probably your head gasket. They really arent too bad to do, well the rear head isnt the easiest. But it does get kind of expensive, Ive done one for about $500 including machine costs, there was a crack in the gasket allowing coolant in the combustion cylinder and other way around it burned the head so I had to get them milled .020 =(
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