Compression 150, 90, 75, 150 ....question (archive)

... on a warmed-up open-throttle plugless engine. And besides being a daily driver with no oil loss, according to MacCartney these engines shouldn't work with a compression less than 100 PSI!

After a squirt of oil into the combust' chamber, pressures are 150, 95, 80, 150.

-leaking valves, leaking bores?

-Guess I'm looking at both a head and block rebuild.

-I'm thinking about just a head rebuild but am I wasting my time?

TIA

Follow Ups:

Re: Compression 150, 90, 75, 150 ....question michael 13:20 6/26/2001 (1)
- plane head, replace head gasket, drive away! michael 13:22 6/26/2001 (0)
Head Gasket darrell 11:39 6/26/2001 (0)
Here's what I'd do..... Colin 07:53 6/26/2001 (1)
- If you need a new gasket... michael 16:10 6/26/2001 (0)
I'll vote for a leaky head gasket Tkent02 20:33 6/25/2001 (0)
Re: Compression 150, 90, 75, 150 ....question Paul 19:20 6/25/2001 (0)
Re: Compression 150, 90, 75, 150 ....question rjb 18:28 6/25/2001 (0)
Re: Compression 150, 90, 75, 150 ....question M///Hard 18:23 6/25/2001 (0)
Re: Compression 150, 90, 75, 150 ....question 02 Maik 18:07 6/25/2001 (2)
- Wow that was fast... Warren, Australia 18:13 6/25/2001 (1)
  - Then off with her head it is! Thanks to all who replied! 20:27 6/25/2001 (0)

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