FW: MC -Low oil pressure - Update 4 (oil pump)

[Livolsi, Stephane]

Don't know if this will be applicable to you, but you never know..

Many moons ago, I rebuilt the 4 cyl engine in my Toyota 4X4.  I completely
dismantled and then sent the block away to be hot tanked, bored and have the
new pistons and crank installed (the only part of the job I didn't trust
myself to do properly)  Got the block back and reassembled the engine and
installed it.
It was incredible, after assembly and double checking, and filling fluids,
the truck started and ran like a top.  Everything was perfect except there
was no oil pressure.  I hunted for 2 weeks to find out why.  Finally removed
the oil pump and packed it with grease, yes, grease because my friends and I
were going on the assumption that the pump could not make enough suction to
get primed.  Reassembled and lo and behold oil comes squirting out the side
of the block.
The shop that did the block work for me had removed an oil gallery plug and
didn't replace it.  I didn't notice it.  Put a plug in and the engine gave
me another 120,000 kms before I sold it, still running strong.

Like I said, I don't know if this will help you out at all, but has anyone
else done anything to that engine that you may not know about?

Stephane

> ----------
> From: 	E Bavely[SMTP:veetesse at hotmail.com]
> Sent: 	November 29, 2002 7:35 AM
> To: 	quattro at audifans.com
> Subject: 	MC -Low oil pressure - Update 4 (oil pump)
>
>
> Hello all...
>
> So...in efforts to solve the oil pressure problem in my newly rebuilt MC
> turbo engine in the 4ktq, I resigned myself to changing the oil pump with
> a
> known good unit.
>
> As I said before, the oil pump I took off the engine looked fine when I
> took
> off the endplate, so I was skeptical about replacing it as the solution to
> the problem.
>
> I worked on the car yesterday, got the oil pump changed and everything
> else
> in place.  Replaced the front crank seal, used the pressure relief valve
> from the known good engine, even used the gasket from the pickup tube to
> the
> oil pump (seemed thicker than the new one I had from the gasket kit).
>
> I started the car with the best of hopes...oil pressure was fine when cold
> and warming up (as normal) and then... same behavior all over again.  As
> soon as the fan cycles, the engine produces around 10 or so psi at idle
> and
> really won't make much more than 20-25 psi when revving. Oh hell...
>
> Obviously, the oil pump was NOT the problem.  Others had told me that the
> pumps never go bad and it would seem they're correct.  Oh well, I had to
> eliminate this from the equation.
>
> The problem is that I've just about run out of things to check with this
> engine.  I'm going to pull the pan again today (yeehaw - 3rd time!) and
> have
> a look at the piston squirters just to try and eliminate them as being the
> problem.  Shouldn't be a problem to get to them with the crank out of the
> way and the long extension on the ratchet...Maybe I'll do as one lister
> said
> and rig up some kind of test setup to see if they're opening when they
> should...
>
> The saga continues.  This one is really starting to get to me.  I was so
> stoked to get the project done and the engine started after about a year's
> planning... On the upside though, I feel pretty good about getting good
> experience by checking everything that I can think of.
>
> Any ideas / suggestions / comments are of course welcome...
>
> Elliott Bavely
>
> 86 4ktq
> 88 80 fwd
> 83 CGT
> 81 Coupe ITB
> 83 Rabbit GTI (2x)
> etc.
>
>
>
>
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