Leaking upper intake AGAIN - Page 6 - 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 03-03-2005, 09:02 PM   #51
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Bob Dillon; pre test your RTV Silicone 24 hours before using on your car. I have two tubes of Permatex Ultra Black that will not cure ( become solid ) just sits there like stinky toothpaste. LOL
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Old 03-03-2005, 09:06 PM   #52
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man i really hope mine dosnt go ou\. but sincemy dad is hopefully moving back to this side of the state, if the intake does fail im not worried aboutthe cost to have it fixed since he is a mechanic. what are some signs to look for and thing to do to prevent the intake failer.
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Old 03-03-2005, 09:18 PM   #53
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Biggest thing to watch for is the coolant level. If you see a drop in coolant and there are no external signs of coolant, drain the oil ASAP.

As far as prevention, your best bet would be to run a 180 stat. Even with that, though, I'm not convinced that it'* THAT much prevention. I don't know. I had the 180 stat for about 6 months and hated it. Car would never warm up, sluggish acceleration, poor fuel economy and developed some condensation in the oil filler neck. I went back to a 195 (actually a 192 from AutoZone) and all those issues vanished.

I check my upper intake area at least once every two weeks just to inspect for coolant. I rely way too much on my car for it to be broken down so I try to stay on top of things. This thread originated because of one of my random checks. Watch for coolant that'* pooled in the lower intake castings.

Not be rude, just to prove a point...but yours will fail, it'* just a matter of when.
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Old 03-03-2005, 09:26 PM   #54
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The only signs I am aware of are using or leaking coolant. The only way to prevent it is not to drive it.
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Old 03-03-2005, 09:36 PM   #55
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i know it gonna fail it could be at 65,000 miles or 90,000 or 130,000 its gonn afail and im prepaired for it when it happens. i dont want it to but its gonna.
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Old 03-03-2005, 09:41 PM   #56
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Quote:
Originally Posted by L27Buick
i know it gonna fail it could be at 65,000 miles or 90,000 or 130,000 its gonn afail and im prepaired for it when it happens. i dont want it to but its gonna.
Good. You realize it!

What I would do is replace it in the summer as preventative maintenance. That'* what I did. That way the coolant never had an opportunity to saturate those bearings!
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Old 03-03-2005, 09:41 PM   #57
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I am unable to find a thread to the throttle body adapter for the aluminum upper described in this thread at Club GP, perhaps because I'm unfamiliar with the way that board works. Could someone please post a link?

I would certainly spend a few hundred bux for the aluminum upper and TB adapter rather than saw the engine with a hydrolock.
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Old 03-03-2005, 10:06 PM   #58
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Quote:
Originally Posted by Bob Dillon
I am unable to find a thread to the throttle body adapter for the aluminum upper described in this thread at Club GP, perhaps because I'm unfamiliar with the way that board works. Could someone please post a link?

I would certainly spend a few hundred bux for the aluminum upper and TB adapter rather than saw the engine with a hydrolock.
Yes, I'm with you. I really want to make an aluminum upper work too.

BTW, what are the specs on that 455 in your signature? I'm putting a 455 in my 79...
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Old 03-03-2005, 10:13 PM   #59
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Vital: the 455 is in my '72 Grandville cpnvertible. It is a .030 over 455 with TRW forged pistons, zero deck clearnace, a Summit short cam, and Crane lifters, valves springs and aluminum roller rocker arms. Summit headers, and about 9.4:1 with 6X heads. Mallory Unitlite ignition with an MSD box. Turbo 400 with a shift kit.

It is surprisingly fast for a 4700-pound car.
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Old 03-03-2005, 10:18 PM   #60
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Quote:
Originally Posted by Bob Dillon
Vital: the 455 is in my '72 Grandville cpnvertible. It is a .030 over 455 with TRW forged pistons, zero deck clearnace, a Summit short cam, and Crane lifters, valves springs and aluminum roller rocker arms. Summit headers, and about 9.4:1 with 6X heads. Mallory Unitlite ignition with an MSD box. Turbo 400 with a shift kit.

It is surprisingly fast for a 4700-pound car.
Damn. LOL. Awesome. Got some money tied up in it! I'm just beginning the build up...planning stages. I'm not looking for a track runner, but something that will really thrust you back in the seat when you stab it.

Sorry, back on track now...back to those upper intakes...
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