Bob,
It is normal. The rings will not wipe all the oil from the walls unless
there is enough compression to spread the rings open- that's how they work.
They are relaxed until combustion takes place and then spread open to seal
against the walls and wiping oil as they go. Take a good look at the rings
and you will see that they are not just washers on the pistons.
Later,
Larry
>From: Bob Tom <tigers@bserv.com>
>Reply-To: dakota-truck@buffnet.net
>To: dakota-truck@buffnet.net
>Subject: Re: DML: oil on cylinder walls, suggestions needed
>Date: Wed, 22 Nov 2000 09:33:55
>
>At 12:47 AM 11/19/00 -0600, you wrote:
> >I have the cylinder heads off the 360 so I can see the pistons. When I
> >rotate the engine, there's a little bit, not much, of oil that gets left
> >behind on the cylinder walls. Is this to be expected? I was wondering if
> >I should replace the pistons along with new rings. Suggestions?
>
>I'd do a compression test first.
>
>Bob. Burlington, Ont., Canada.
>'97 Dakota CC, 5.2L, 4x2, 3.92 SG, auto., 4265 lb.
>Dyno: 231.2 rwhp 340.0 lb-ft rw torque
>PB: 14.737 @ 91.75 9.364 @ 72.95
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