Attn: Mr Cheerful (re: crack in inlet manifold)

I can see that checking for cracks in an inlet manifold could be easy with the engine running. What about when it's not?

Reply to
Les
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You can diagnose whether it is too weak to start by manifold suction value when cranking with the throttle shut and of course if it will start with extra fuel (easy start) blown in (which presumably it did) Pressurising the engine via a plug hole with appropriate valves open and the exhaust plugged would also show it, but that would be going a bit far.

Reply to
Mrcheerful

One (hopefully) last question: would a leaking inlet manifold gasket have created the same non-start symptoms and susbsequent explosive effect as a cracked manifold?

Reply to
Les

yes, it certainly could have. But generally an inlet gasket only effectively leaks near one cylinder and usually the car will start but not run as it should do .

If you look closely along the edges of the break, and all is clean and the same colour then an inlet gasket leak is more likely, but if part of the break is discoloured then that is probably where the problem started.

Reply to
Mrcheerful

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