Remove Exhaust Manifold Rb20

[rayj]

Hi

In the process of installing a turbo. While off I thought it would be a good idea to get the exhaust manifold off too, check for any busted gaskets or studs.

So far the process has been pretty straight forward.

Problem is I can't get the exhaust manifold off. All 12 nuts have been removed, but the manifold isn't budging. Is it meant to slide off relatively easy?

I've tried prying it off with force, it's moving a little, but I can see it's starting to stuff up the thread on some studs.

Is there some sort of trick, or do you just keep swearing and try pulling it off from every angle?

Cheers for any help

[Missileman]

Mine came off quite easily, but I had two broken studs, the outer ones on cylinder 1&6

I would recommend replacing all ex studs including washers, yokes and nuts while its all apart.

[Hadouken]

Take out some of the studs with the mani. It would have "deformed" over its long life of heat cycles

[rayj]

I will replace all of that stuff for sure, even if it looks as if it's already been off some time recently. Gasket looks clean and fresh.

Just gotta get the manifold off first, turning out to be the hardest part.

One thing I did notice when taking everything off, which didn't seem right, was how loose everything was.

Dump pipe was loose, turbo on the manifold was almost finger tight, same with the exhaust manifold.

[75coupe]

Heat and vibration tends to loosen the manifold to turbo nuts unless you use conical nuts or some sort of thread lock or tighten them when really ficken hot