Type 4 exhaust header differences - side specific??

[Wasted youth]

Go ahead and shit all over me for either not using the Search Engine or not knowing the answer to this question... I did try the Search Engine, and also looked in the Photo Gallery and the Classifieds because those are often good sources of information.

I am probably not using the right keywords. Anyway... what application is exhaust header A meant for?

Header B fits the 2.0 Type 4 engine. By the way, they are both oval port.

[Hoody]

They are both for the 75-78 type 4 exhaust. There is a right and a left side. You cannot use two lefts or two rights. I had a parts seller on here try to tell me he's been doing this for 40 years and this is the first time he had ever heard of such a thing.

[SGKent]

What Bob said.

one left one right, look at the flanges. Oval port with tin. Scarce with tin. I have one NOS one and looking for the other side. Probably none exist anywhere in the world - been looking for 11 years.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[Wasted youth]

Thanks. It’s all coming back to me now. Absolutely... a left and a right side. The long side is on the Passenger side of the engine.

But... what if you moved the heads around. Or matched up two heads that used just one style. I imagine the exhaust nomenclature would be crooked.

[tommu]

Yes, the manifolds will fit the heads fine but will not be able to mate to the 'afterburner' u shaped pipes.

I had a lot of trouble with cracked headers. I took a video of leak testing one that looked perfect. I taped up the ports, sprayed washing detergent on the harder and reversed the output of my shopvac to see if they leaked. All the used ones I bought leaked.



Link

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[SGKent]

I have a headache.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[Hoody]

If I am not mistaken those can be tig welded where they are leaking. That is where the stainless meets the regular steel. They are only junk when the stainless part of the pipe cracks. Because as most people who weld know welding stainless that is cracked is pretty much pointless. I had Scott at GS rebuild my f pipes and u pipes with new laser cut flanges and they are as good as new. Actually better than new because they are also ceramic coated externally as well as internally. No more tins and I am confident the coating of both sides of the pipe will yield less heat than the original asbestos and sheet metal did.

[Wasted youth]

[Xevin]

[Wasted youth]

To add to the confusion, take a look at the photos from this ad for a 1977 bus exhaust system (ad dated Jan 24, 2018 and renewed this month) from Chris Morrice; note how BOTH exhaust headers have the deep flange.

https://www.thesamba.com/vw/classifieds/pix/7752937.jpg

https://www.thesamba.com/vw/classifieds/pix/7752939.jpg

https://www.thesamba.com/vw/classifieds/pix/7752939.jpg

And here is another ad from 1584man in the Classifieds showing basically the same thing; both sides have the deep flanges:

https://www.thesamba.com/vw/classifieds/pix/7823834.jpg

https://www.thesamba.com/vw/classifieds/pix/7823846.jpg

The 2.0 engine I am working on requires one deep flange and one flush flange (left and right side). I do not know the history of this engine, except that is was poorly maintained (gee, no shit, right?) The air box number begins with GD but it has hydraulic cam followers and it's in a model year 1978 and should be a GE engine. Frankenmotor?

The seller bryan wilson advertises this piece as the Right Side for model years 1975-1978:

https://www.thesamba.com/vw/classifieds/pix/7972484.jpg

And he also shows these all for model years 1975-1978 yet there is not a single flush flange in the bunch. All deep flanges:

https://www.thesamba.com/vw/classifieds/pix/6833105.jpg

https://www.thesamba.com/vw/classifieds/pix/6833104.jpg

Hopefully tomorrow I can post a photo of one each of the different cylinder heads in my stash. I think I have one that is deep and one that is shallow. Both for a 2.0

[WhirledTraveller]

If you need a flush flange it's because somebody threw a square port head on one side and then cut the ends of the header to fit. Nothing from the VW factory 1978 and prior came that way. Common for disreputable engine builders to build the engine with whatever they have laying around including mix-and-matching oval and square port heads.
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1977 Westy, Automatic. Big Valve heads, CS Cam.

[Wasted youth]

[WhirledTraveller]

[Hoody]

Yes I just realized that top one has been modified. Someone chopped the top of it off as stated to work with a square port head. I did not see that before. Whoops.

[Wasted youth]

Confirmed today the oval port head I have requires deeper exhaust header B and the shallow port head I have is square port, so I agree that header A in my picture is a modified oval port exhaust header made to fit the square port cylinder head. Square port exhaust gasket allows oval exhaust header to seal.

[notchboy]

[Wasted youth]

Oh, I know! All kinds of lead-ins!

[SGKent]

If Notchboy or anyone else has a NOS Manifold F-pipe 021-251-551 he should PM me because I have a NOS 021-251-552.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[notchboy]

[SGKent]