Heat shield doesn't fit

Dmcbrass · 07-25-2004

I just changed the Exhaust/intake manifold on my GT. I was surprised to find that the heat shield didn't fit the replacement intake manifold. It seems that there are at least two different configurations of intake manifolds. The replacement one has a shorter rise at the carbureter connection. The bent ends of the heat shield are hitting the manifold leaving it 1/4" above the gasketed surface. Anyone else run into this? Are there different heat shields for different manifolds or did some Opels come without heat shields?

tekenaar · 07-26-2004

Originally Posted by Dmcbrass

I just changed the Exhaust/intake manifold on my GT. I was surprised to find that the heat shield didn't fit the replacement intake manifold. It seems that there are at least two different configurations of intake manifolds. The replacement one has a shorter rise at the carbureter connection. The bent ends of the heat shield are hitting the manifold leaving it 1/4" above the gasketed surface. Anyone else run into this? Are there different heat shields for different manifolds or did some Opels come without heat shields?

None came without heat shields. Parts manual lists two P/Ns for the heat shield:

P/N 850990 - '68-'72 Kadett and '69-'73 GT
P/N 850991 - '71-'74 All Model 50 (Manta/1900)

Can't tell you what the difference is though.

Dmcbrass · 07-26-2004

Based on my experience this weekend, I'm guessing that my new manifold is from a 71-74 Manta and that the difference is in the height of the heat shield.

oldopelguy · 07-26-2004

Don't forget that the Solex also had a 1/4" thick phenolic spacer under it, which might have been under the heat shield, I can't remember. Even if it wasn't origionally, no reason one or 2 of the spacers couldn't go under the heat shield now to make up the difference. Much better idea, I think, than modifying the heat shield.

Dmcbrass · 07-26-2004

Oldopelguy,
That's a good idea. Where could I find a phenolic spacer?

oldopelguy · 07-26-2004

Well, that depends on how handy you are and what kind of tools you have. If you have a drill, saw, and at least a round file, I'd go with this:
http://cgi.ebay.com/ws/eBayISAPI.dll...829031212&rd=1
And make your own spacer(s). This retailer has been great with me in the past, and this material should do the trick nicely and leave you with plenty for spares or just in case.

If you're not so handy you could try to source a couple of stock Opel spacers, but they will need to be opened up anyway (to match the larger bore of the Weber) to work well, so the work is about the same.

Dmcbrass · 07-26-2004

Thanks for the info!

07-25-2004	#1 (permalink)
Dmcbrass Member Join Date: Jan 2004 Location: Virginia Posts: 392	Unanswered: Heat shield doesn't fit I just changed the Exhaust/intake manifold on my GT. I was surprised to find that the heat shield didn't fit the replacement intake manifold. It seems that there are at least two different configurations of intake manifolds. The replacement one has a shorter rise at the carbureter connection. The bent ends of the heat shield are hitting the manifold leaving it 1/4" above the gasketed surface. Anyone else run into this? Are there different heat shields for different manifolds or did some Opels come without heat shields?

07-26-2004	#4 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Saint Michael, MN Posts: 1,727 Logbook Entries: 3 Provided Answers: 2	phenolic gasket Don't forget that the Solex also had a 1/4" thick phenolic spacer under it, which might have been under the heat shield, I can't remember. Even if it wasn't origionally, no reason one or 2 of the spacers couldn't go under the heat shield now to make up the difference. Much better idea, I think, than modifying the heat shield. __________________ 1958 Rekord Sedan, 1958 Olympia Wagon, 1959 Opel Olympia Sedan, 1967 Kadett Coupe, 1967 Admiral Sedan 4L CIH-6, 1968 Kadett fastback 1.1L, 1970 Kadett Wagon Turbo 2.2L, 1971 Kadett Sedan 1.1L, 1975 Manta Wagon 4.3L V-6

07-26-2004	#6 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Saint Michael, MN Posts: 1,727 Logbook Entries: 3 Provided Answers: 2	how handy are you? Well, that depends on how handy you are and what kind of tools you have. If you have a drill, saw, and at least a round file, I'd go with this: http://cgi.ebay.com/ws/eBayISAPI.dll...829031212&rd=1 And make your own spacer(s). This retailer has been great with me in the past, and this material should do the trick nicely and leave you with plenty for spares or just in case. If you're not so handy you could try to source a couple of stock Opel spacers, but they will need to be opened up anyway (to match the larger bore of the Weber) to work well, so the work is about the same. __________________ 1958 Rekord Sedan, 1958 Olympia Wagon, 1959 Opel Olympia Sedan, 1967 Kadett Coupe, 1967 Admiral Sedan 4L CIH-6, 1968 Kadett fastback 1.1L, 1970 Kadett Wagon Turbo 2.2L, 1971 Kadett Sedan 1.1L, 1975 Manta Wagon 4.3L V-6

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07-26-2004	#3 (permalink)
Dmcbrass Member Join Date: Jan 2004 Location: Virginia Posts: 392	Based on my experience this weekend, I'm guessing that my new manifold is from a 71-74 Manta and that the difference is in the height of the heat shield.

07-26-2004	#5 (permalink)
Dmcbrass Member Join Date: Jan 2004 Location: Virginia Posts: 392	Oldopelguy, That's a good idea. Where could I find a phenolic spacer?

07-26-2004	#7 (permalink)
Dmcbrass Member Join Date: Jan 2004 Location: Virginia Posts: 392	Thanks for the info!

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