series I engine leaks & repairs (int coolant manifold)

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, Olds 98 91-96, Buick Lesabres and Park Avenue 91-96. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
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aukc
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series I engine leaks & repairs (int coolant manifold)

Post by aukc »

so I take my car into the GM dealer for it's annual service & inspection, tech finds a bunch of things to fix, I'll cover them one at a time, first is the coolant mainfold to intake manifold. I didn't even know this existed until the tech pointed it out, it's a small plate hidden under the throttle body attached to the back of the intake manifold, it was damp with coolant, tech recommended replacing gasket, also since must remove throttle body to gain access, bought that gasket too before starting job

drain some coolant - Image

remove throttle body - Image

gasket not in greatest shape, looks like leaking coolant both ways, to outside and into intake - Image

manifold plate removed - Image

cleaned up and ready to put back together - Image

back together, just need to install intake hose - Image
1995 SSEi
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Re: series I engine leaks & repairs (int coolant manifold)

Post by J Wikoff »

Where'd you find the coolant jacket gasket by itself? I couldn't ever find it anywhere but in a whole top end kit.
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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights
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Re: series I engine leaks & repairs (int coolant manifold)

Post by spoiledred94 »

If anybody would have the individual gasket my bet would be the dealer. close to a hundred dollars, but they'd have it. What else came up on your annual inspection?
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Re: series I engine leaks & repairs (int coolant manifold)

Post by 00Beast »

Not even dealers have that part. I know willwren cuts his own with a laser, and I think you can get it in engine gasket sets, like JWikoff said.
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Re: series I engine leaks & repairs (int coolant manifold)

Post by myfirstbonnie »

It looks like they are adding it to the UIM gasket sets now.

http://www.autozone.com/autozone/parts/ ... 66145_0_0_
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Re: series I engine leaks & repairs (int coolant manifold)

Post by aukc »

J Wikoff wrote:Where'd you find the coolant jacket gasket by itself? I couldn't ever find it anywhere but in a whole top end kit.
just want to make sure we're talking about the same thing, which is the gasket to seal this plate to the back end of the intake manifold -

Image

I didn't take a picture of the new gasket before I installed it, and there's nothing left of the old one, it was reduced to a pile of shavings once I scraped it off a bit at a time. I think it's called the engine coolant manifold gasket - part number 25534752, it did have to be special ordered, took a few days to come in, price was $7.95 CDN

throttle body gasket also had to be special ordered - part number 24501693, price was $11.20 CDN
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Re: series I engine leaks & repairs (int coolant manifold)

Post by spoiledred94 »

What problem were you having that this will fix?
2001 Bonneville SSEi. 1598xx mi.
great car. Wrecked

ImageImage
Burnt Bonny.

Note if you pull the injectors to obserbe fuel delivery...make sure you leave the plugs in and disconnect the ign. Believe me
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Re: series I engine leaks & repairs (int coolant manifold)

Post by 00Beast »

spoiledred94 wrote:What problem were you having that this will fix?
aukc wrote:it was damp with coolant, tech recommended replacing gasket
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RIP sandrock
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Re: series I engine leaks & repairs (int coolant manifold)

Post by J Wikoff »

aukc wrote:
J Wikoff wrote:Where'd you find the coolant jacket gasket by itself? I couldn't ever find it anywhere but in a whole top end kit.
just want to make sure we're talking about the same thing, which is the gasket to seal this plate to the back end of the intake manifold -

Image

I didn't take a picture of the new gasket before I installed it, and there's nothing left of the old one, it was reduced to a pile of shavings once I scraped it off a bit at a time. I think it's called the engine coolant manifold gasket - part number 25534752, it did have to be special ordered, took a few days to come in, price was $7.95 CDN

throttle body gasket also had to be special ordered - part number 24501693, price was $11.20 CDN
Yeah, same one.
Image
WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights
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