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Replacing Manifold

Posted: Wed Jul 05, 2017 10:45 pm
by beefio
I want to replace my original manifold with a Janspeed 421 that I've brought and I'd really appreciate any advice/tips on the best way to get the old one off and new one on?

Cheers

Re: Replacing Manifold

Posted: Sat Jul 08, 2017 7:09 am
by beefio
Come on don't leave me hanging...

Re: Replacing Manifold

Posted: Sat Jul 08, 2017 8:50 am
by quick_spider
Undo the bolts and put the new one on.

For the performance manifolds it's sometimes useful to lift the car quite high off the ground and undo the sump tie bar to get the clearance you need to negotiate the headers past the block.

Re: Replacing Manifold

Posted: Sat Jul 08, 2017 9:48 pm
by beefio
Yeah I hope it's that easy!

I've read that it's really tight and others have losened the engine mounts. But you think the sump tie bar will do it.

Any other thoughts?

Re: Replacing Manifold

Posted: Sat Jul 08, 2017 10:15 pm
by beefio
What/where is the sump 'tie bar'?

Re: Replacing Manifold

Posted: Sun Jul 09, 2017 10:50 am
by quick_spider
It's the engine mount attached to the sump.

Re: Replacing Manifold

Posted: Sun Jul 09, 2017 11:09 am
by beefio
Ah makes sense!

Re: Replacing Manifold

Posted: Mon Jul 10, 2017 3:17 pm
by flyingbanana
cjj did a how to on mg-rover.org iirc

Re: Replacing Manifold

Posted: Mon Jul 10, 2017 3:49 pm
by beefio
Yeah I read that. He said it took him hours and he had to lever the engine to get enough space!

Hence me posting this tread...

Re: Replacing Manifold

Posted: Sat Aug 12, 2017 2:18 pm
by beefio
Right I'm trying to change my manifold over and having trouble!

I even get the old one out!

Do I need to remove the down pipe for the manifold first? All the bolts are completely rusted sonwas trying without?

Do I need to remove the bracket that hold the heat shields so these are getting in the way?

Do I remove the o2 sensor first? I can't seem to get to it, what size spanner do I need?

HELP!!!

Re: Replacing Manifold

Posted: Sat Aug 12, 2017 6:21 pm
by Mikeadman
Done it yet?

Re: Replacing Manifold

Posted: Sat Aug 12, 2017 6:45 pm
by beefio
No had to give up and waiting for help!

Re: Replacing Manifold

Posted: Sat Aug 12, 2017 9:27 pm
by talkingcars
In plug the O2 sensor, it's easier to remove it from the pipe when it's off the car.

Remove the heatshield brackets if they are in the way.
Cut the pipes at the bottom where they bend.
Undo the head to manifold bolts.
You should then be able to remove the down pipe up and out.

Re: Replacing Manifold

Posted: Sat Aug 12, 2017 9:54 pm
by beefio
The bolts that secure the passenger side heat sheald also appears to fix the engine block to the gear box, so is it ok to remove these?

Also someone said to undo the sump tie bar to get clearance, where is it?

Re: Replacing Manifold

Posted: Sun Aug 13, 2017 11:16 am
by talkingcars
It's fine to undo one bell housing bolt,IIRC therd are another 14 holding it togeather.

The tie bar is obvious when you look under the engine.

Re: Replacing Manifold

Posted: Sun Aug 13, 2017 11:27 am
by beefio
Is the tie bar towards the rear with 2 bolts into the sump?