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Discussion Starter · #1 ·
Well, I have a replacement manifold arriving for my 2.0l G today as the one on it is cracked (common fault on the X20XEV engine).

So thought I would ask if anyone has got any tips for removing the old manifold and avoiding sheering the mounting studs when you take the bolts off? I had an X20XEV in an Omega before which had 3 sheered bolts, cost me about £500 to get it in a garage and have them drilled out, retapped etc then put back together!
 

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A.O.N - Approved Vauxhall Specialist (Anthony)
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If you are replacing the manifold, then you don't have to worry about the manifold to downpipe bolts snapping - just need new ones when you put the new manifold on.

For the manifold studs, they will generally wind out of the cylinder head rather than snap if you use something like a air powered ratchet, or a battery or air powered impact gun to 'buzz' them out.
 

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Discussion Starter · #3 ·
Unfortunately don't have access to that, its tools on the drive mode for me. Ill be working penetrating oil onto them all for a good 24 hours prior to starting on it which might help free them up, then just work at them slowly and hope for the best I think :)
 

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Discussion Starter · #4 ·
Well, job done this weekend.

All the original studs came out easily, as said they just screwed straight out of the head still attached to the bolts. I had replacement studs and bolts anyway so not a problem.

It would appear this has previously suffered with a sheared bolt as one of them had been drilled and retapped with a bigger bolt, so had to put that one back in as I didn't have anything to fit.

Finally, not blast of exhaust gases in the cabin everytime I start the car from cold :)
I did leave a reasonable amount of skin from my right hand on various parts of the fan housing though while undoing the bolts, so thats a little sore haha.
 
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