[Vwdiesel] The importance to lining up oil pump gears with markings on ea...

[brian gochnauer]

Actually when the main bearing are truely 'spun' they'll often increase oil
pressure becase they seize to the crankshaft sealing the oil hole.
Rod bearings can cause a hard knock as the bearing allows the piston to
reach up and tap the head on exhaust/intake stroke.
But with 35k miles, for me, it's likely the knock is a bad injector steaming
fuel unevenly in the cylinder causing the piston to 'rock' or slap in the
cylinder.

imho
BrianG
iowa


On Mon, Oct 5, 2009 at 11:37 AM, Bryan Belman <dieselwesty at yahoo.com> wrote:

> Well, no way it is intermediate shaft bearing causing this oil pressure
> loss on this motor.  The motor only has like 35K on it all in all.
> Injectors were new with the engine, these sounds seem like they are coming
> from deep down in the motor and with the oil pressure drop I was seeing,
> that tells me main bearings have spun.  I did not see any coolant or
> particals of metal in the oil when I drained some into a dish to examine
> before dumping it all in preps. to remove the motor.
> Coolant has no oil in it either.
> I has gotten 29.5MPG on my last trip, that is really good for a Vanagon.
> All seemed to be preforminng properly, good power as well for the first 500
> miles after swapping oil pumps.
>
> ??
>
>  Bryan Belman, Pt. Pleasant, NJ
> 04 Jetta Wagon TDI PD, 100hp, 5sp -- running :)
> 92 Jetta 1.6 Eco-Turbo Diesel -- running :)
> 82 Diesel Westy 1.9NA -- running :}
> 70 Type 1 stock Beetle -- Not running :(
>
>
>
>
> ________________________________
> From: "LBaird119 at aol.com" <LBaird119 at aol.com>
> To: vwdiesel at vwfans.com
> Sent: Monday, October 5, 2009 11:32:42 AM
> Subject: Re: [Vwdiesel] The importance to lining up oil pump gears with
> markings on ea...
>
>   That kind of knocking CAN be caused by bad injector/s.  Will just
> found that out.  Oil pressure drop is usually from non replaced int
> shaft bearings.
>   Not quite sure what you mean by lining up the gears.  You do need
> to always be sure the drive shaft slot and tab properly engage so that
> the oil pump will turn but I don't recall mesh/timing marks on the
> gears themselves.  Even so, it would continue to pump oil, just perhaps
> less efficiently and the pump might wear but the oil filter should catch
> the wear particles and so long as you don't drive it with no pressure,
> the mains should survive fine and you'd just need to replace the oil
> pump.
>   Ahhh, just realized what the "mail" bearings are!  "L" typo for an "N".
> :-D
>   Maybe it's just something with the oil pump AND a bad injector or
> two instead of bearings?  :-)
>     Loren
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