The Dark Wob

Sounds like it.

fried onions wrote: ↑Thu Nov 21, 2019 9:55 pm Compression test results are in.

1&2: zero
3,4,5&6: 150 psi.

Look on the bright side - you have a very healthy four cylinder engine there.

The other bright side is that if you have a sound bottom end, once that head is done (easy to say, I know....) that Humber will run longer than a Brexit debate.

Head gasket blown between 1 and 2.

Not a major drama. I'd get another head overhauled and ready so that it's a day's work to get it up and running again.

RELIABLE HUMBER ENGINE

It is extremely capable of being so again! And at less cost than a few hours chasing fault codes on a modern. Or MoT'ing a Jagwah.....

When I get chance I'll start with the simple things like those valve clearances and cylinder head bolt torques. But the compression test is saying a lot, especially between two adjoining cylinders. I am certain it has been overheating in the past due to neglect. Hopefully a chunk hasn't been blown out of the block, but these are pretty bloody strong engines and it would take a lot to stop one.

If it's blowing out of 2 when 1 is blocked then there's no point wasting time checking valves, the head gasket has gone between those 2 cylinders.

I am minded to agree, but with the rocker cover off anyway it's a simple check to make.

DodgeRover wrote: ↑Fri Nov 22, 2019 8:32 pm If it's blowing out of 2 when 1 is blocked then there's no point wasting time checking valves, the head gasket has gone between those 2 cylinders.

This is the answer and as the Rev said strip down the spare head and build it up ready to go. The gasket has blown between the 2 cylinders and hopefully it hasn't worn a groove in the block. No point messing with valve clearences if it is as described it's the gasket.