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Author Topic: exhaust manifold  (Read 1575 times)

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bigpat

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exhaust manifold
« on: 31 May 2010, 20:26:27 »

hi to all.ineed to do manifold gaskits both sides of my v6 3.0.has anyone got any hints that may help.it looks a pig of a job.thanks.......
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same #same#

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Re: exhaust manifold
« Reply #1 on: 31 May 2010, 20:31:31 »

A good supply of plasters :y
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JamesV6CDX

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Re: exhaust manifold
« Reply #2 on: 01 June 2010, 00:52:35 »

How old/worn are all the other gaskets?

May be easier to do a top end rebuld in the long run?
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tidla

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Re: exhaust manifold
« Reply #3 on: 01 June 2010, 01:04:44 »

have not done this job but heads off seams a bit drastic.

generally speaking if somethings tight i always use the drop the engine mounts to give more room.
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2woody

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Re: exhaust manifold
« Reply #4 on: 01 June 2010, 08:55:22 »

heads off is the easiest way to do this - by far.

Ok, it's going to cost you a pair of head gaskets, but every one I've seen recently has been corroded to quite an extent.

..... and it gives you the chance to do the cam box seals at the same time.
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bigpat

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Re: exhaust manifold
« Reply #5 on: 01 June 2010, 15:34:26 »

cheers for advice guys.not long had hg done.maybe try and get spanner and try tweekin nuts up.droping engine mount out sounds a got move.thanx. :y
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andyc

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Re: exhaust manifold
« Reply #6 on: 01 June 2010, 15:51:35 »

Done my heads the other week and there would have been no way of getting the manifold bolts out with the heads still in place.

Bolts on both downpipes snapped, i had two broken studs in both heads, half the studs came out with the nuts and all the heat sheild bolts were knackeded.

Took bloody ages to get all the bits of broken stubs out of various holes, one tip though, when you put everything back together use lamba sensor paste on all the fixings and you shouldn't have a problem next time they need doing

Oh, according to TIS its head off to do the manifolds

Cheers
Andy
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Iceni Automotive. Classic Vauxhall/Opel Specialist. Service, Repairs, Restoration
Thetford. Norfolk

Marks DTM Calib

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Re: exhaust manifold
« Reply #7 on: 01 June 2010, 17:59:27 »

Quote
Done my heads the other week and there would have been no way of getting the manifold bolts out with the heads still in place.

Bolts on both downpipes snapped, i had two broken studs in both heads, half the studs came out with the nuts and all the heat sheild bolts were knackeded.

Took bloody ages to get all the bits of broken stubs out of various holes, one tip though, when you put everything back together use lamba sensor paste on all the fixings and you shouldn't have a problem next time they need doing

Oh, according to TIS its head off to do the manifolds

Cheers
Andy

Pre 98?
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terry

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Re: exhaust manifold
« Reply #8 on: 01 June 2010, 19:07:34 »


http://www.omegaowners.com/forum/YaBB.pl?num=1187928695/0#0

Here ya go Big Pat, get your head around this, click on the link from JamesCDX, not a job for the faint hearted but but loads of help from the boys if you get stuck, the trick is if your in a rush to finish the job dont even start it, be methodical label all you remove, make notes, i replace as many bolts into the holes where i have removed an item (pulleys, water pump ect0 so im not hunting for the correct bolt in a box of different sizes.  small plastic bags you can wright on with permanant marker are usefull
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Marks DTM Calib

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Re: exhaust manifold
« Reply #9 on: 01 June 2010, 19:15:00 »

For info

The drivers side is not to bad to do, about 2.5-3 hours start to finish.

The passenger side is actualy quicker to do but, more painful due to having to do most of the job from underneath. It requires removal of the B bolt, front pipe and oil filter.....the secret to refitting is to fit the studs first and then the manifold!

Post 98 cars tend to be trouble free with respect to studs etc, before this there can be 'issues'
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terry

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Re: exhaust manifold
« Reply #10 on: 01 June 2010, 19:22:44 »

Is this with the heads on or of Mark ?
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Marks DTM Calib

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Re: exhaust manifold
« Reply #11 on: 01 June 2010, 19:23:16 »

Quote
Is this with the heads on or of Mark ?

Heads on
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terry

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Re: exhaust manifold
« Reply #12 on: 01 June 2010, 19:26:10 »

how do you get around the fixings in the back of the heat shields?
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terry

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Re: exhaust manifold
« Reply #13 on: 01 June 2010, 19:31:22 »

Just a thought Bigpat, if , as you say, if the head gaskets have not been done long, were the manifold gaskets not done at the same time?
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Marks DTM Calib

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Re: exhaust manifold
« Reply #14 on: 01 June 2010, 19:36:58 »

Quote
how do you get around the fixings in the back of the heat shields?

Passenger side is easy, drivers side requires removal of the coolant pipe.

Not hard
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