Exhaust manifold gaskets, yay or nay?

[SweetWagon]

Quick query,

Currently in process of doing two engine conversions L36 > L67 v6's.

Something im not sure about is the exhaust manifold gaskets. The motor im using was from a wrecker's it didnt have any exhaust on it but there were gaskets stuck to the heads still, the other motor purchased from a forum member still had the stock manifolds on it with no gaskets. Holden also say there is no exhaust manifold gaskets for these motors (L36 & L67).

As both motors are getting pacemaker extractors, should i source some gaskets or just bolt them on directly?

Cheers

[Burnout124]

i would get some gaskets

[SweetWagon]

i would get some gaskets

Even if Holden fit them without gaskets from the factory?

[Burnout124]

if you are going to have extractors thay seal better but with origanal manafolds i would not bother

[SweetWagon]

if you are going to have extractors thay seal better but with origanal manafolds i would not bother

Hmm i cant say i can see any difference in the sealing between extractors and original manifolds, may have to consult the exhaust shop

[Darren_L]

some extractor/header manufacturers specify not to use gaskets.
That was the case with the Pacemakers I bought for my 304
I don't use gaskets, just a bit of high temp exhaust sealant and no leaks so far.

[SweetWagon]

some extractor/header manufacturers specify not to use gaskets.
That was the case with the Pacemakers I bought for my 304
I don't use gaskets, just a bit of high temp exhaust sealant and no leaks so far.

Alright cheers might look into that

[Burnout124]

Hmm i cant say i can see any difference in the sealing between extractors and original manifolds, may have to consult the exhaust shop

as a mechanic i can only say what i do

[Brett_jjj]

The VSV6 gregorys workshop manual also says that no gaskets are used on the exhaust manifolds.Heres what it actually says :
" the manifold and cylinder head sealing surface must be in perfect condition as no gasket is used".

[Blown V6 Hatch]

A light smear of high temp silicone is all you need. When it comes to extractors, gaskets belong in the bin.

[Tree cutter]

When i bought Pacemakers for my Calais with the L67 motor, they came with gaskets. The original manifolds had no gaskets.