I've got a blowing exhaust gasket on my 400, so I've pulled the manifold off and plan to do the usual bank of modifications before refitting (notch lower holes etc...
The manifold itself...
Is in decent condition. I had a good look over it for signs of cracks etc. No real problems to note. The leaking gasket was fairly evident...
...by its black soot. I think it was this point where I noticed the biggest worry I have found yet. Soot, or rather the lack of it...
This is cylinder 5 (3rd from front) on the O/S manifold. Its not a trick of the light, that's a total lack of soot in there. The inside of the tube looks brand new. Ruh Roh. Surely the corresponding port on the head is...
...oh rollocks. Clean as a whistle. well, some mild soot but nothing like the others. Right....
I've either lost a spark, which seams unlikely as its never sounded like that, or I've dropped an injector... Thoughts? Its the only port that is as clean as this. I'm thinking it may be more likely to be a spark issue, and the cleanliness is from fuel wash?
The manifold itself...
Is in decent condition. I had a good look over it for signs of cracks etc. No real problems to note. The leaking gasket was fairly evident...
...by its black soot. I think it was this point where I noticed the biggest worry I have found yet. Soot, or rather the lack of it...
This is cylinder 5 (3rd from front) on the O/S manifold. Its not a trick of the light, that's a total lack of soot in there. The inside of the tube looks brand new. Ruh Roh. Surely the corresponding port on the head is...
...oh rollocks. Clean as a whistle. well, some mild soot but nothing like the others. Right....
I've either lost a spark, which seams unlikely as its never sounded like that, or I've dropped an injector... Thoughts? Its the only port that is as clean as this. I'm thinking it may be more likely to be a spark issue, and the cleanliness is from fuel wash?
