Chuck, sorry to hear about your engine damage. My Haynes manual shows the
oil flowing from the outside of the filter towards the center back into the
engine. You should be able to look at the adaptor off the engine and see
which line is ported to the outside and which is ported to the inside.
Also take a look at your check valve for the accusump. You should have a
check valve preventing backwards flow thru the pump from the accusump during
periods of low pump output. Without it your accusump would at least
partially dump back to the sump side. If this valve is in the wrong place or
backwards it could cause this problem.
May also want to check the screw-in bypass valve in the block, if it sticks
open your pump will dump back to the pan.
Mark
----- Original Message -----
From: "Chuck Arnold" <chuck.arnold@oracle.com>
To: "'Robert M. Lang'" <blang@mit.edu>
Cc: <6pack@autox.team.net>; <Fot@autox.team.net>
Sent: Wednesday, March 24, 2004 9:44 PM
Subject: RE: Motor Probs
> Well, I am sure that the oiling solution was part of the problem. The
> oil from the crankcase was blackish [engine only ran 15 minutes and it
> was a very clear non-detergent 30 weight that went in]. However, oil
> from the oil filter was like new -- i.e., it was not being used. The
> head showed no evidence of piston to head or valve problems, but number
> two cylinder was somewhat scarred and had traces of aluminum [so said
> the mechanic, presume that is form the rings?]. Anyway, the issue was
> probably hot oil and lack of adequate oiling. I am having him pop that
> piston and check the rings, hone the cylinder, examine the bottom end
> for any damages [thank god for nitriting], etc. Will now use the oil
> hose coming form the oil cooler to feed the Accusump and the external
> oil feed to number one.
>
> Does you happen to know, with the screw on oil filter adapter that
> includes ports for going to an oil cooler, which line [the top one or
> the bottom one at the adapter] is out to the oil cooler and which one
> the return?
>
> Chuck
>
> -----Original Message-----
> From: Robert M. Lang [mailto:blang@mit.edu]
> Sent: Tuesday, March 23, 2004 1:04 PM
> To: chuck.arnold@oracle.com
> Subject: Re: Motor Probs
>
>
> Hi,
>
> Looking at your pictures, I'm confused. Why did you set up a pressure
> feed
> to the #1 main only? Was there a block in the oil gallery in the engine
> block?
>
> If _I_ was plumbing this thing and wanted a feed to the #1 main, I'd put
> a
> "check valve" between where the line comes out of the block and the #1
> main.
>
> I have a funny feeling that you are getting some "funky" flow there. If
> the
> #1 main is hammered (also check the #1 rod bearing because it is fed
> from
> the # main) then you're getting inadequate oil flow and it'd be related
> to
> your plumbing job.
>
> As an aside, all the other engines that I've seen plumbed like that have
> a
> FAT hose and there is a feed to each main bearing gallery _and_ the cam
> oil
> holes.
>
> Regards,
> rml
|