1963 C10 Chevrolet stovebolt 230 engine dead miss on 5-6

[p0689109]

Was the gasket actually blocking the pathway or just torn?

 

[8ob]

Aside of whats been written in the other posts you can tell a lot from one of those point and squirt thermometers , pointed at the exhaust manifold you will soon see which cylinders you are dealing with.
https://www.ebay.co.uk/itm/Digital-...hermometer-Non-Contact-IR-Laser-/222869270706

Bob

 

[Allthegearnoidea]

The gasket was pushed up. I would say it was partially blocking the inlet port. Funny thing was I did have a listen around the manifold and couldn’t hear anything. A vacuum gauge may have shown the problem but never had much luck with the vacuum gauges. It’s ok if you new what the engine was running before the problem.

For future reference I’m interested to know how the IR sensor would have helped for an air leak? I just pulled the HT leads. If the sound doesn’t change there’s the problem cylinders.

Been caught out in past with manifold leakage and never really found a satisfactory method of identifying them. Tried the wd40 trick never works for me. How do the pros do it?

Chris

 

[Shox Dr]

I’ve used brake cleaner on the GMC motor. It worked well finding leaks on the throttle body and carb, as well as manifold. I now paint the gaskets with Rocol ‘Oilseal’
No had any leaks since using it, in either inlet or exhaust manifolds

 

[armalites]

The gasket was pushed up. I would say it was partially blocking the inlet port. Funny thing was I did have a listen around the manifold and couldn’t hear anything. A vacuum gauge may have shown the problem but never had much luck with the vacuum gauges. It’s ok if you new what the engine was running before the problem.

For future reference I’m interested to know how the IR sensor would have helped for an air leak? I just pulled the HT leads. If the sound doesn’t change there’s the problem cylinders.

Been caught out in past with manifold leakage and never really found a satisfactory method of identifying them. Tried the wd40 trick never works for me. How do the pros do it?

Chris

If the cylinder isn't firing then it won't be hot.

You can buy machine that pump smoke in which find all the gaps

 

[Allthegearnoidea]

Do you get a change to the engine noise when the cleaner is sucked in ?

 

[Shox Dr]

Do you get a change to the engine noise when the cleaner is sucked in ?

Yes. RPM will increase momentarily.

 

[p0689109]

OK who fitted the gasket and manifold? Come on, own up!

 

[Allthegearnoidea]

No actually this time I’m actual squeaky clean for once. It was my friend. This is the same friend that tightened down all the tappet bolts last week, because he thought they were a bit loose and that may have been engine the problem.

 

[p0689109]

Dangerous man to be near an engine I would have thought!!