Re: compression woes

[Eric Walter <ewalter@domain.elided>]

bob prohaska wrote:
> 
> Hi all,
> 
> My '72 Scout II (V345, auto) has developed a serious lack of
> compression, but only in the two frontmost cylinders (1 and 2).
> Number 1 shows about 90 psi, number 2 is only good for 72.
> 
> Squirting about a tablespoon of oil in number 1 raises the
> pressure to about 160, but it takes about 3 times that much
> oil in number 2 to get a mere 130 psi.
>
Bob,
One trick is to rotate the engine till valves are closed, then put
compress air in through the spark plug hole and see where it comes out
(sump, exhaust, carb).  Blow nozzle with a rubber tip works pretty good,
but you can make an adapter by breaking the ceramic out of a sparkplug
and brazing on a pipe fitting.  You can also use an adapter from some
compression testers.
Good luck,
Eric