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From: Scotty on 21 Apr 2010 07:19

"John_H" <john4721(a)inbox.com> wrote in message news:ib2rs5tti5fuahcdqajn4s8to83lau2ut2(a)4ax.com...
: Jason James wrote:
:
: >Did you take the readings for each cylinder? Done with a
: >compression gauge rated to 250 psi. Gauge either has a large tapered rubber
: >knozzle to fit in the plug hole,..or a screwed fitting. Its imperative you
: >hold open the throttle (wide-open) while someone cranks the engine for at
: >least 8 revs. What were the figures?
:
: And you've forgotten one absolutely vital requirement... any idea what
: it is? :)
:
: --
: John H

Apart from removing all plugs and the coil lead? Oh and the device rammed into the hole, its no good
in ya pocket now is it.


From: Scotty on 21 Apr 2010 07:21

"John_H" <john4721(a)inbox.com> wrote in message news:2tsss5hlsjqqnbls84u07cq0bmk8ajtipp(a)4ax.com...
:
: Never had much faith in the oil bit myself -- it's supposed to verify
: whether compression is being lost past the rings. If it is, there are
: plenty of more reliable indications than a compression reading.
:
: IMHO a compression gauge is a useful tool for sussing out valve
: related problems... and very little else.
:
: --
: John H

Isnt adding oil into the bore a 2nd test? At normal temp the correct reading will be gained. If low
compression on one pot then add oil. If the reading gets better then its most likely worn rings.

Am I wrong in this?


From: atec7 7 ""atec77 " on 21 Apr 2010 08:55
Scotty wrote:
> "John_H" <john4721(a)inbox.com> wrote in message news:ib2rs5tti5fuahcdqajn4s8to83lau2ut2(a)4ax.com...
>
> its no good
> in ya pocket now is it.
>
>

Isn't that what the Duchess asked the Duke ?
From: John_H on 21 Apr 2010 19:13
Scotty wrote:
>
>Isnt adding oil into the bore a 2nd test? At normal temp the correct reading will be gained. If low
>compression on one pot then add oil. If the reading gets better then its most likely worn rings.
>
>Am I wrong in this?

The blurb that comes with the compression gauge probably says so...
but why bother when the quick, easy (and far more effective) check for
blow by is to remove the oil filler cap while the engine is running.

Takes about five seconds, and even if you're deaf and blind you'll
still be able to smell it if it's bad enough to show up in a
compression test. :)

--
John H
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