coolant issue? UPDATED: now with pics! - 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 03-17-2004, 01:29 AM   #11
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Quote:
Originally Posted by jr's3800
So this is going to be the intake you put on your 95?
Yup, that'* the one. Even without the reinforcements. But hey, if she survives another 100k miles, maybe I'll splurge and buy her a new Dorman manifold

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Originally Posted by jr's3800
I'm shocked and pissed to see that it wasn't upgraded in 2000... I have a 99 intake..
Yeah, I'm kinda surprised myself -- and the guy I bought it from said it'* out of an '02 -- I wonder if it came from the factory with a two-year-old manifold on it? Or if the salesman was ... er, misinformed

-b
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Old 03-17-2004, 01:51 AM   #12
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Those are good pictures thank'* for posting them. Before you buy a new overflow tank take yours off and fill it with 50/50 bleach and water over night, worked for me. Comit and a brush cleans the outside ok.
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Old 03-17-2004, 02:08 AM   #13
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I know Pure Performance Fever has a kit to reinforce these.... Check it out!
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Old 03-17-2004, 10:02 AM   #14
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Quote:
So this is going to be the intake you put on your 95? correct... I'm shocked and pissed to see that it wasn't upgraded in 2000... I have a 99 intake..
Dittos. Man, does that suck. I thought I'd be able to get by without having to change it.

So much for thinking GM went to an improved intake starting in 99.....

Makes me wonder why there'* not a GM TSB out there for anything 99 and newer for the upper intakes. They must have changed SOMETHING.
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Old 03-17-2004, 11:43 AM   #15
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My 99 has a 195 thermostat and is 100% stock.

The casting date on the upper intake is 01/99.

Something had to have been improved, though, because GM doesn't have any TSBs for 99 and newer...coupled with the fact that I only know of one person having an upper intake problem on a 99 and newer (was actually on a 99).
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Old 03-17-2004, 01:20 PM   #16
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maybe you guys could find the answer if you stopped just looking at the upper intake and looked at the egr system as a whole, since that'* what causes the problems.

here'* a free tip: have someone with a brand new series 2 n/a take a picture of their upper intake and see what'* going on. once you've seen that, then start looking at other things...

matt
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Old 03-17-2004, 01:21 PM   #17
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free tip #2:

if you find that the *new* upper intakes that aren't failing are the same as the old ones, start asking yourself what an aftermarket kit that changes the design of that intake will do to the egr system as a whole...

just some food for throught

matt
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Old 03-17-2004, 02:32 PM   #18
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Quote:
Originally Posted by vital49
My 99 has a 195 thermostat and is 100% stock.

The casting date on the upper intake is 01/99.

Something had to have been improved, though, because GM doesn't have any TSBs for 99 and newer...coupled with the fact that I only know of one person having an upper intake problem on a 99 and newer (was actually on a 99).
the 99 and newers are just coming into the problems now on milage.

mkaake - the failures are a result of a thin walled coolant passage, and heat from the engine, and the EGR system.
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Old 03-17-2004, 03:20 PM   #19
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Quote:
Originally Posted by BonneMeMN
Quote:
Originally Posted by vital49
My 99 has a 195 thermostat and is 100% stock.

The casting date on the upper intake is 01/99.

Something had to have been improved, though, because GM doesn't have any TSBs for 99 and newer...coupled with the fact that I only know of one person having an upper intake problem on a 99 and newer (was actually on a 99).
the 99 and newers are just coming into the problems now on milage.

mkaake - the failures are a result of a thin walled coolant passage, and heat from the engine, and the EGR system.
trust me, i know. just suggesting (very strongly) that the upper intake is not the only part of the equation, and so you should never *just* look at the upper intake. also suggesting that if the upper intakes that are being made today are the same as the ones that were being made in '96, then something other than the upper intake was changed - and you'd be better off looking for that instead of changing the characteristics of your upper intake manifold...

matt
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Old 03-17-2004, 03:48 PM   #20
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Quote:
trust me, i know. just suggesting (very strongly) that the upper intake is not the only part of the equation, and so you should never *just* look at the upper intake. also suggesting that if the upper intakes that are being made today are the same as the ones that were being made in '96, then something other than the upper intake was changed - and you'd be better off looking for that instead of changing the characteristics of your upper intake manifold...
We already know that GM went to an improved intake at some point after 2000. Now, looking at the whole picture, we're trying to figure what was exclusive on 99 to not warant a TSB and not have seen many coolant issues.
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