Re: [Chrysler300] Engine/Compression question

[G Barker <gbarker@xxxx>]

Make sure when you take your compression readings that you hold the throttle wide open.
if you don't you will get false readings. Another thing you can do to see if it is
rings is to put 5-6 squirts of oil in the cylinder that is low. crank the engine over a
few times to spread the oil around. Then take your compression readings again. If they
come up a good amount it means your rings are leaking. If it makes very little
difference then it is valves or gasket.....Gary Barker

Jonathan Sacks wrote:

> Hi all,
>
> Quick question about compression:
>
> I just had my 413 rebuilt along with the carb.
> Replaced/rebuilt a lot of the other engine components
> at the same time.
>
> Unfortunately, after putting it all together and
> starting it up I find that I have low compression in
> two chambers. Around 30 when of course it should be up
> around 90.
>
> Now I've heard differing views on this, but my
> question is, can the compression problems be anywhere
> besides inside the chamber. Like in the carb, maybe?
> Or does it have to be either the rings or how the
> valves are seated?
>
> I guess what I'm asking is, am I going to have to pull
> the engine off and get the rebuilders to take it apart
> again?
>
> Always grateful for the advice,
> Jonathan
>
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