Gasket question please
Gasket question please
Author
Discussion

Andy70

Original Poster:

1,418 posts

186 months

Monday 13th July
quotequote all
Are there any gaskets or sealer required when putting the Y piece exhaust section back in? you have the band clamps 1 end and the other is it just some sort of paste maybe? cheers

BritishTvr450

561 posts

26 months

Monday 13th July
quotequote all
No.
You might find when trying to join the two manifold pipes to Y piece very difficult to line them up. This is simply because the manifolds tend to slightly go out of shape over the years.
One solution is to use a ratchet strap around both manifolds and draw them together so the clamps go on properly.
I preferred to undo manifold bolts at the heads so loosening the manifolds enough to manipulate them onto Y piece as I feel using a ratchet strap risks cracking the manifolds as that has been known to happen in the past but using a strap is definitely easier but not necessary a very proffesional solution.

Sardonicus

19,402 posts

248 months

Tuesday 14th July
quotequote all
BritishTvr450 said:
No.
You might find when trying to join the two manifold pipes to Y piece very difficult to line them up. This is simply because the manifolds tend to slightly go out of shape over the years.
One solution is to use a ratchet strap around both manifolds and draw them together so the clamps go on properly.
I preferred to undo manifold bolts at the heads so loosening the manifolds enough to manipulate them onto Y piece as I feel using a ratchet strap risks cracking the manifolds as that has been known to happen in the past but using a strap is definitely easier but not necessary a very proffesional solution.
This ^ Hello Alun beer

Andy70

Original Poster:

1,418 posts

186 months

Tuesday 14th July
quotequote all
BritishTvr450 said:
No.
You might find when trying to join the two manifold pipes to Y piece very difficult to line them up. This is simply because the manifolds tend to slightly go out of shape over the years.
One solution is to use a ratchet strap around both manifolds and draw them together so the clamps go on properly.
I preferred to undo manifold bolts at the heads so loosening the manifolds enough to manipulate them onto Y piece as I feel using a ratchet strap risks cracking the manifolds as that has been known to happen in the past but using a strap is definitely easier but not necessary a very proffesional solution.
Brilliant thanks for the info

BritishTvr450

561 posts

26 months

Thursday 16th July
quotequote all
Sardonicus said:
BritishTvr450 said:
No.
You might find when trying to join the two manifold pipes to Y piece very difficult to line them up. This is simply because the manifolds tend to slightly go out of shape over the years.
One solution is to use a ratchet strap around both manifolds and draw them together so the clamps go on properly.
I preferred to undo manifold bolts at the heads so loosening the manifolds enough to manipulate them onto Y piece as I feel using a ratchet strap risks cracking the manifolds as that has been known to happen in the past but using a strap is definitely easier but not necessary a very proffesional solution.
This ^ Hello Alun beer
Hi Simon. Miss you guys buddy wavey

PabloGee

849 posts

47 months

Thursday 16th July
quotequote all
I recently did this task too.
I chose to tighten the bolts on the manifolds, then use a ratchet strap.
My thinking was to avoid having to tighten the 16 awkward manifold bolts into the engine block if under tension.
I'd rather need to replace an exhaust band clamp than rethread an engine block.

BritishTvr450

561 posts

26 months

Thursday 16th July
quotequote all
PabloGee said:
I recently did this task too.
I chose to tighten the bolts on the manifolds, then use a ratchet strap.
My thinking was to avoid having to tighten the 16 awkward manifold bolts into the engine block if under tension.
I'd rather need to replace an exhaust band clamp than rethread an engine block.

That’s not an issue. It’s not the clamps you’ll need to repair/replace but cracks in manifolds have long since been a problem.
If you undo the manifold bolts just a few mm this then gives a high degree of movement at the clamp points and once connected the bolts do up very easily. Obviously you do them in a sequence that slowly draws them back onto the heads but having done this on a number of occasions there is little pressure on those bolts, and if they had I’d not advocate this technique!
Undoing them simply allows movement rather than twisting the manifolds trying to manipulate them in line with the Y piece.
Breaking a manifold is not ideal and then requires re welding which can cause even more distortion.
But hey go crack on, excuse the pun.