Question about manifold intake/outtake on Willys MB

[Wild Bill Kelso]

Now that I'm here I want to ask you something, please note that I'm not a native speaker
My problem is as follows:
I have to re install a new intake and outtake manifold. Both are new and I don't know how to do it. From some friends I got different answers...and my question is: Do I have to screw in- and outtake at first together (on a plain underground for sure) and install them at last on the engine block....or should the connection between them be a little "loose" while I install them on the engine block and bring them all together while installing?

I hope you understand what I mean and would be happy for any tips.

Wild Bill Kelso

[dfast]

Second option is better.
It is not needed to tight them extra strong, you will probably use new gaskets.
After engine is driven for some time, you can tighten the bolts a bit more.

[Chuck Lutz]

You might be able to bolt them to the block and THEN tighten the four bolts that connect them but if they were obtained from different engines or there was any warping to them you would not know that in advance and not be able to overcome that and you might crack a casting or not get a perfect seal.

You are spending thousands of dollars/euros on the engine and jeep...as far as I know, the only sure way to get a perfect seal is machining the two manifolds once they are bolted TIGHTLY together.

[artificer]

What Luc said. Make sure the manifold heat valve is free to move plus fitted properly before both manifolds are assembled.

[Wild Bill Kelso]

Machining the two manifolds means to bolt them together on a very exactly underground (Table) and then to grind
the half moon cutout’s that they will match together?
What I have noticed is (when I screwed together the intake and outtake incl. sealing, I have different
used original parts) that they don’t fit 100% at the point where they come together on the two bolts.
There is no round hole....no matter which parts I put together. The two holes are always a little bit displaced.
I will post a picture asap for a better understanding...

[Wild Bill Kelso]

Yes, this problem about the thickness have I found on an a repro manifold.

I’m a bit unsure about the stud, if I will grind a little bit for to make some place for the stud wont’t I bring the manifold out of the correct position for the exhaust gas?

[Wild Bill Kelso]

Attached a photo from repro-stuff only for to show what I mean:

Repro1.jpg (118.91 KiB) Viewed 662 times

[Chuck Lutz]

....and another pic of an early GPW manifold set that ARE original, not repop junk:

Early GPW Intake Exhaust Rear.jpg (195.29 KiB) Viewed 654 times

[Wild Bill Kelso]

I will report by tomorrow how it was going on....

[nick peters]

Bill
The manifolds that are in Chucks picture are quite correct. I suggest before you grind anything that you contact the supplier/manufacturer of the parts in question. I'm sure that you have been supplied something which has been miss machined in error, and that they will quickly exchange the items for correct units. If you grind anything they could walk away from the problem. If on the other hand they are unwilling or are unable to rectify the problem. I would suggest you ask for reimbursement of the cost of what seems at this moment, to be manifolds which are unfit for purpose. In my opinion
good luck. Regards Nick

[Wild Bill Kelso]

You are right, I've contacted the seller for a solution and will report what happened...

Meanwhile I've got a used one and will take a photo if assembled

[Wild Bill Kelso]

Seller will take back his stuff
Attached a photo from the correct installation, thank you all for your support and for helping me!

Wild Bill Kelso

[nick peters]

There ya go Billy boy
regards Nick
ps Hope that the repro manifold mistake was just a one-off

[Wild Bill Kelso]

I'm not sure...a lot of repro-scrap is around here in Europe...Seller told me they never ever had problems...it's normal that there is always a little work on the mainfolds and I would be the first person which complains

I can't belive....

[nick peters]

Bill It may well be that you have been the one unlucky person to have received a faulty item. One thing for certain IF the problem persists then a lot of people will indeed be knocking on the supplier/manufacturers door. In my opinion, its Good that you made others here on 503 aware of this. Thank you
regards Nick