M400 Manifolds

[Richie350]

Hi all

What are the differences between M400 & 3 exhaust manifolds and are they a direct replacment? or are any other parts required to fit them?? Richie350

[EddieC]

Noble now only provide one type of replacement manifold which was originally for the m400. It is much stronger and has additional plate welded to each side to provide a greater level of support to the turbos and hopefully won't break again.

The manifolds are a direct replacement for the old, the only extra parts you would need are replacement gaskets etc.

I am in the process of getting mine replaced due to cracking. The supply of the manifolds are £179 each and the gaskets are £56, all plus VAT.


Eddie

[Adrian W]

Still made out of chocolate, the price seems to be going up faster than petrol, the last set i bought were 140quid the pair, from Noble

[Richie350]

Hi Adrian, has anyone had any manufactured from Stainless or are the later M400 a better chocolate mix?

[F.C.]

Richie350 said:

Hi Adrian, has anyone had any manufactured from Stainless or are the later M400 a better chocolate mix?

My M400 manifolds cracked and needed some work. Best you get some additional gussets welded in or they'll crack again!
F.C.

[S26VE P]

I have been thinking about either buying a second set and beef up or just remove mine and beef up. whats the best choice? or could i have a pair sitting here for PPL to exchange?

[Adrian W]

Richie350 said:

Hi Adrian, has anyone had any manufactured from Stainless or are the later M400 a better chocolate mix?

They are stainless, but the fundamantal problem is that the turbo's are hung off of them and it's this weight that stresses the manifolds eventually cracking them, the only way to stop them cracking would be to move the turbo away and support it properly,

[NobleGuy]

My turbos appear to have a supporting metal arm attached at the bottom. Anyone else have this?

[Adrian W]

NobleGuy said:

My turbos appear to have a supporting metal arm attached at the bottom. Anyone else have this?

They all have, doesnt work though, the turbo is just to heavy for the way it is mounted

Edited by Adrian W on Tuesday 27th May 11:06

[S26VE P]

Strange that this is a problem, The rover coupe turbo has the same turbo fitted with NO supports and has seem 118k with no problems, well apart from the head gasket

[Adrian W]

S26VE P said:

Strange that this is a problem, The rover coupe turbo has the same turbo fitted with NO supports and has seem 118k with no problems, well apart from the head gasket

wouldnt mind a look sometime, there must be a subtle difference, bet the manifold is cast and stress relieved

[S26VE P]

Quite possibly cast i guess do have one somewhere in the shed will try to find it at some point.

[MadMacMcMad]

Is the Rover 4Cyl. If so, it'll have a bit more support from there.

[S26VE P]

Ah good point.

[NobleGuy]

[quote=Adrian W]....the turbo is just to heavy for the way it is mounted
[quote]

Yay!

[Biggriff]

When we were doing the VNT upgrade the manifolds were cracked to b***er and some issues were identified with both the design and the manufacture.

The conclusion of the Engineers was that they need to be cast in a better quality material.

As mine were chopped up anyway to make the VNT's fit we went with gusset welding what was left of the standard ones.

The conclusion that the turbo's are too heavy is relevant but if the manifolds had been made properly that should not be an issue.