[Vwdiesel] RE: re riniging rabbit oil pressure bad

[Bart Wineland]

Oh no.  Replace camshaft? Yes I did, line bore? No I didn't.  The guy that 
rebuilt it originally 25k miles ago broke away the cam slot where the lock 
plate goes. I took the cam from my original low mileage 69k engine and 
thought it fit just perfect and thought myself pretty handy. I did measure 
the journals as careful as I could with mics. and they appeared identical 
but sounds like it is not that simple? I re-used the bearing caps that were 
in it. I think I am taking my lumps for being a bonehead.
thanks,

Bart

At 09:01 AM 10/19/2004 -0400, greg rich wrote:


>Did the intermediate shaft bearings get changed? -both?)
>my neighbour had a machine shop rebuild his 1.9 td and they didn't change 
>them, exactly the same situation, lots of cold oil pressure, non when hot, 
>he lost his turbo very soon afterwards...
>It took three times for them to figure it out (re and re engine). They 
>would not admit to it being there mistake. They kept saying they installed 
>a new oil pump, sure it was new but no markings on it (was it meant for a 
>turbo diesel?) as they are larger pumps.
>
>I don't think your head can cause low oil pressure like that UNLESS you 
>changed the camshaft and the bearings don't match-the cams are not 
>interchangable without a line boring to match them.
>
>
>Most machine shops that are not familar with VW never know about those two 
>bearings inside there.
>Check over your bills and see if they were done
>Greg
>
>
>Re-ringing a Rabbit --Oil pressure test bad
>
>>This is exactly my problem with oil pressure.  I get great pressure on start
>>up 70 psi using 15w-40 shell, once warmed up I get 8psi at idle and 20psi at
>>55mph in 5th gear. This reading from the oil filter housing port. The head
>>shows zero pressure after warm up. This is after a complete rebuild, new
>>everything except the head. It still has the original valve seals which had
>>40k on them, I'm a dumb A@@ for not changing them out. The machine shop
>>decked the head to make it flat due to it being out by .004  They looked
>>over the rest and said it looked good and it vacuum tested great so the
>>valves were sealing. I should have just had them do a complete head work and
>>been done with it but I wasn't thinking. The engine has new pistons, rings,
>>bearings and oil pump. So the low oil pressure is a mystery and the engine
>>has 3300 miles on it now running with low oil pressure. I installed the head
>>and followed the Bentley to the letter. Gasket is installed correctly,
>>torque bolts to specs everything. Could it be possible that the cam saddles
>>are worn excessively? Just a thought.
>>Don't mean to make this sound bad but it is good to see someone else out
>>there with the same problem. Maybe, finally this low oil pressure issue can
>>be solved.
>>I have light smoke blue in color out the exhaust, but only after the engine
>>is warmed up, at least it seems that way for the most part, don't notice it
>>much on initial cold start up and run till warm. I do get black smoke under
>>heavy acceleration, even thought this is an ECO diesel. I wonder if my cat
>>is shot now?
>>Nick
>>
>>
>>
>>
>>-----Original Message-----
>>From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
>>Behalf Of Bart Wineland
>>Sent: Monday, October 18, 2004 10:01 PM
>>To: vwdiesel at vwfans.com
>>Subject: Re: [Vwdiesel] Re-ringing a Rabbit --Oil pressure test bad
>>
>>I need to clean the engine off again to see where the oil is leaking from.
>>When I could see the oil bubbling around the exhaust flange donut while it
>>is running my first thought was it was from oil getting by the rings into
>>the exhaust and thought that may explain the heavy white/gray smoke and low
>>oil pressure also. But that oil could have come from when I had the valve
>>cover off?? Wouldn't blow by cause a loss in low oil pressure?  It does
>>tango alright. From a high of 70 psi with a cold engine (about 40 degrees
>>outside) to under 10 psi after it warms up for 12 minutes. I did use old
>>cut off head bolts with slots filed in them (per archives) to keep the head
>>gasket aligned. It is a hydraulic head with the extra oil port so the
>>gasket can't go on upside down. Torqued it according to Bentley in sequence
>>I think 30# first pass, 40# second, then with just a breaker bar for the
>>final pass, although Bentley calls for an additional 1/2 rev. on each bolt
>>I could not get that. Maybe 1/4 rev. I was sure the headbolts were going to
>>twist off. I forgot to mention that the oil pump was replaced last fall
>>before all this started also, so it only has 9 or 10k miles on it and oil
>>pressure was not a problem before I pulled the engine and fixed everything
>>:)   Pressure at the pump sensor? You mean the sensor at the filter?
>>"Don't you give up."  You guys make that pretty hard.
>>
>>Thanks,
>>Bart
>>
>>
>>At 08:21 PM 10/18/2004 -0400, you wrote:
>> >It would seem to me that oil pressure, oil leaks and blowby are three
>> >completely unrelated items.  Does your oil pressure tango?  How low does
>> >it go?
>> >(warmed up and idling?  Did you use cut off bolts to keep the head gasket
>> >in place?
>> >  How 'bout pressure at the pump sensor?  Don't you give up.
>> >Andrew
>> >P.S.  I once had an engine Sieze approx. six months after complete rebuild.
>> >Started it up backed out the driveway, first gear, went to shift into
>>second,
>> >stalled.  That's wierd she never stalls!  Click, click went the
>> >started.  0 to
>> >very bad day in 1 second.  Aparently a little piece of aluminum (not a
>>diesel
>> >VW) from the align bore had finally made it to the crank bearing.  (Why
>> >didn't the pressure washer blow it out of the gallery?) Pinch.  I bet if I
>> >had been
>> >under load I might/might not have felt a hiccup before it clearanced
>>itself.
>
>
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