11 hours ago
Thanks for the various comments.
Whilst I didn't really think it was leaking past the spark plugs I have now ordered two different types of sealing washer from what was Green Spark Plugs but now seem to be Green Classic and Vintage. One type are what they call "Budget" steel washers whilst the others are rather like copper "O Rings" and is their recommendation.
I'm going to change these when they arrive and see if it has any effect as this would be by far the easiest fix.
If I've still got an issue I'm thinking the exhaust manifold gasket would be the next most likely culprit. It's an Ulsteroid and has a replica Ulster design exhaust manifold so there's a manifold plate which bolts to the block and the top edge of this plate lies along the head / block joint which is why I can't really tell where the apparent leak is coming from.
I'm actually rather reluctant to disturb this as the inner fixings, which also retain the aluminum manifold, are sock head cap screws rather than studs and, knowing my luck, these will shear or damage the block if I try to remove them.
Anyway, I'm awaiting delivery of the spark plug washers and will see what effect that has.
John.
Whilst I didn't really think it was leaking past the spark plugs I have now ordered two different types of sealing washer from what was Green Spark Plugs but now seem to be Green Classic and Vintage. One type are what they call "Budget" steel washers whilst the others are rather like copper "O Rings" and is their recommendation.
I'm going to change these when they arrive and see if it has any effect as this would be by far the easiest fix.
If I've still got an issue I'm thinking the exhaust manifold gasket would be the next most likely culprit. It's an Ulsteroid and has a replica Ulster design exhaust manifold so there's a manifold plate which bolts to the block and the top edge of this plate lies along the head / block joint which is why I can't really tell where the apparent leak is coming from.
I'm actually rather reluctant to disturb this as the inner fixings, which also retain the aluminum manifold, are sock head cap screws rather than studs and, knowing my luck, these will shear or damage the block if I try to remove them.
Anyway, I'm awaiting delivery of the spark plug washers and will see what effect that has.
John.