Exhaust Manifold Removal

[aphid]

Hey all,

Got all the nuts off the head studs, the only thing i can see still holding the manifold to the block is the gasket, and the bitch won't move.. I've wedged a breaker bar between the head and the manifold and put a fair bit of pressure on it but it seems to no avail..

Has anybody got any hot tips on how to get this f**ker off, or what might still be holding it on?

cheers in advance,

Mark

[sinistaGTR]

lol you sure you have all the nuts off, they should come off with out much force, but try wiggling from side to side.

[aphid]

yeah mate pretty sure all the nuts are off, the gasket is sticking it together like all hell, i'm afraid to use too much pressure with the pry bar... i've never actually had to remove a manifold off an RB before, are there any hidden bolt locations that i could've missed like there is with the head? :S

[Craved]

100% you have 12 nuts off the manifold? wouldnt use the pry bar too much (from the head anyway) since its aluminium.

[aphid]

the aluminium head is the reason i don't want to put too much pressure on it

yup, just went and counted 10 nuts with no bolts on them, and 2 holes where there were no studs, obviously been taken out at some stage during the engines life and not replaced :S

have any other people had occurances where the gasket had caused the manifold to stick to the head?

Edited July 20, 2007 by aphid

[MANWHORE]

It'll come off. I've had one a bit sticky before. It was because one of the studs was half snapped, and it was wedged against the edge of one of the holes (if that makes sense), since the manifold was warped.

Try tapping it lightly with a mallet. Lightly, not smash it like crazy

[aphid]

yeah she was just stuck up stiff on some of the studs.. decent taps with a sledge in this instance is your friend

[MANWHORE]

Make sure you get the manifold machined.

You most likely will also need to clean up the holes with a die grinder just to make it fit on flat.

[sinistaGTR]

off topic but what plenum do you have