'69 Intake Manifold on a '73 Engine?

bosco · 12-29-2003

Wondering if a 69 intake manifold (it has a 69 stamped on it kind of near where the 73 is stamped on my original manifold) will work on my 1973 GT. I can see that it is somewhat different around where the carb studs are....the 73 appears to be beefed up more. I like the older manifold because there is no EGR orafice, which I am having trouble sealing up properly (nothing seems to thread in there just right) and I no longer have the EGR pipe valve attaced.

Any help appreciated.

BQS4 · 12-29-2003

There are several ways to do it, one would be to just have it filled up by welding it.

Jim Branham · 12-29-2003

The 69 would work but the 73 manifold flows better and is the recommended one for porting for more performance. Check out the article by Rally Bob, it's on this site.

bosco · 12-30-2003

How does one find the article......all i can find are the pictures??? I'm trying to figure out how he plugged the egr opening in those pictures.

oldopelguy · 12-30-2003

Are you talking about one of the screwed-in fittings or the solid tube on the outside of the mainfold?

With the screwed-in fittings, unscrew them and get a brass pipe plug. The threads don't have to be a perfect match, it just has to start in the threads and tighten down. Between the soft aluminum and the soft brass the threads will malign enough to ensure you get a good seal if you tighten it enough. After all, do you really want the plug to come back out later?

If you're worried about the press-fit steel tube, or you don't think the plug will seal in one of the other holes, buy the next size larger brass plug and the tap to match. Drill the hole out with the size called for on the tap, tap the new larger hole, and screw in the plug. Obviously you'll want the manifold off so nothing gets into the motor.

bosco · 12-30-2003

I'm talking about the screwed in fitting. I put a cast iron pipe plug in there but it didn't go in very far before it got tight and it looks pretty obvious. I wanted something that looked less "hey I removed my egr valve" for when I go to get this thing smog tested every year. The one in "Rally Bobs" pictures looked like it was pressed in or at least fit down inside the opening. Maybe it would be easier to work with the brass plug to make it look better. Thanks for the tip.

Gary · 12-30-2003

Originally posted by bosco
How does one find the article......all i can find are the pictures??? I'm trying to figure out how he plugged the egr opening in those pictures.

It's in the Download section. Here's the download link: http://www.opelgt.com/modules.php?s=...op=getit&lid=6

bosco · 12-30-2003

Thanks Gary, but all I'm getting is pictures. Is there a worded explaination that goes along with it? I'm thinking there must be but I'm having trouble figuring it out.

Gary · 12-30-2003

Oops. Sorry, that download only has the pictures. I didn't check it before I posted the link. Try searching for "Ported intake" if you need more info.

If you are pulling the EGR pump off, Otto (tekenaar) is looking for one.

tekenaar · 12-30-2003

Originally posted by Gary
. . .

If you are pulling the EGR pump off, Otto (tekenaar) is looking for one.

THANKS for remembering, Gary!

If ANYONE has an old air pump from either engine (1.1 or 1.9) and used only on the early engines, '68 and '69 I believe, send me an e-mail. If from the 1.9 engine and you also have the mounting bracket, that would be a PLUS! Thanks.

opelenvy · 12-30-2003

I used a pipe thread plug. Got it at O'Rielly. I don't remember the size but it was standard.

tekenaar · 12-30-2003

Originally posted by opelenvy
I used a pipe thread plug. Got it at O'Rielly. I don't remember the size but it was standard.

Believe that would be a 3/8" NPT plug . . . have used them myself as thread is "close enough".

Old Hippie · 12-31-2003

bosco, if you want that "that's the way it is" look, get a female allen socket plug to put in there or a steel plug. The brass will stick out like a sore thumb to the inspectors.

bosco · 12-31-2003

I think you might be right. I have some Eastwood paint I could use on the manifold that matches the aluminum really well but not sure how long that would stay on there.

tekenaar · 12-31-2003

Originally posted by Old Hippie
bosco, if you want that "that's the way it is" look, get a female allen socket plug to put in there or a steel plug. The brass will stick out like a sore thumb to the inspectors.

If you get a brass or steel "Allen head" type, you should be able to screw it in far enough to be flush with the outside of the manifold and virtually unnoticeable unless pointed out. JM2CW

12-29-2003	#1 (permalink)
bosco Member Join Date: Nov 2003 Location: Las Vegas, NV Posts: 494	Unanswered: Intake Manifolds Wondering if a 69 intake manifold (it has a 69 stamped on it kind of near where the 73 is stamped on my original manifold) will work on my 1973 GT. I can see that it is somewhat different around where the carb studs are....the 73 appears to be beefed up more. I like the older manifold because there is no EGR orafice, which I am having trouble sealing up properly (nothing seems to thread in there just right) and I no longer have the EGR pipe valve attaced. Any help appreciated.

12-29-2003	#2 (permalink)
BQS4 Southern Red Neck Join Date: Mar 2002 Location: Snellville, GA Posts: 6,027 Real Name: Gene Provided Answers: 12	There are several ways to do it, one would be to just have it filled up by welding it. __________________ "Yes, I do have a rifle rack in my Sportwagon"

12-29-2003	#3 (permalink)
Jim Branham Opel fan Join Date: Mar 2003 Location: N.J. Posts: 380	intake manifold The 69 would work but the 73 manifold flows better and is the recommended one for porting for more performance. Check out the article by Rally Bob, it's on this site. __________________ Jim B.

12-30-2003	#5 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Saint Michael, MN Posts: 1,727 Logbook Entries: 3 Provided Answers: 2	drill, tap, plug Are you talking about one of the screwed-in fittings or the solid tube on the outside of the mainfold? With the screwed-in fittings, unscrew them and get a brass pipe plug. The threads don't have to be a perfect match, it just has to start in the threads and tighten down. Between the soft aluminum and the soft brass the threads will malign enough to ensure you get a good seal if you tighten it enough. After all, do you really want the plug to come back out later? If you're worried about the press-fit steel tube, or you don't think the plug will seal in one of the other holes, buy the next size larger brass plug and the tap to match. Drill the hole out with the size called for on the tap, tap the new larger hole, and screw in the plug. Obviously you'll want the manifold off so nothing gets into the motor. __________________ 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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12-30-2003	#4 (permalink)
bosco Member Join Date: Nov 2003 Location: Las Vegas, NV Posts: 494	How does one find the article......all i can find are the pictures??? I'm trying to figure out how he plugged the egr opening in those pictures.

12-30-2003	#6 (permalink)
bosco Member Join Date: Nov 2003 Location: Las Vegas, NV Posts: 494	I'm talking about the screwed in fitting. I put a cast iron pipe plug in there but it didn't go in very far before it got tight and it looks pretty obvious. I wanted something that looked less "hey I removed my egr valve" for when I go to get this thing smog tested every year. The one in "Rally Bobs" pictures looked like it was pressed in or at least fit down inside the opening. Maybe it would be easier to work with the brass plug to make it look better. Thanks for the tip.

12-30-2003	#8 (permalink)
bosco Member Join Date: Nov 2003 Location: Las Vegas, NV Posts: 494	Thanks Gary, but all I'm getting is pictures. Is there a worded explaination that goes along with it? I'm thinking there must be but I'm having trouble figuring it out.

12-31-2003	#13 (permalink)
Old Hippie Senior Contributor Join Date: Jun 2003 Location: Paxico, Ks. Posts: 787	bosco, if you want that "that's the way it is" look, get a female allen socket plug to put in there or a steel plug. The brass will stick out like a sore thumb to the inspectors.

12-31-2003	#14 (permalink)
bosco Member Join Date: Nov 2003 Location: Las Vegas, NV Posts: 494	I think you might be right. I have some Eastwood paint I could use on the manifold that matches the aluminum really well but not sure how long that would stay on there.

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