Oil Pump Drive Query

[hiltow]

The oil pump is driven by a shaft with a gear on the end that's in turn driven from a drive on the intermediate shaft.

It's the gear on the end of the oil pump drive shaft that I'm interested in - ETKA shows the exploded diagram showing this gear and the dowels that fix it to the oil pump drive shaft.

My problem is that this gear is only shown on ETKA for a PL engine code and no other. I've bought a new genuine oil pump, but the gear doesn't come with it.

Question is: how do I go about buying a near gear for the end of the oil pump drive?!?!?!? My engine code is EW.

Surely, all the engines work off the same principle, so why is the gear part only showing for the PL engine?

[Blueshark]

If you look at the older Scirocco's 1982 - 1983 you will find that there is a loose gear.
But these are no longer available, so in fact you have or an old model pump or the wrong one.

Joost

[Nate]

i've got a mk1 1.6 lump if you want the oil pump from it

[hiltow]

Thanks guys, but I'm after a new oil pump. Car is a 1986 GT (1.6).

I've already got the oil pump from VW, which should be the right one (part 027 115 105E), but this doesn't have the gear on the end of the drive, which is puzzling.

I have a suspected fault where the gear on the end of the oil pump drive may possibly be slipping (rarely) very very slightly; so slightly as enough to make the engine lose it's own timing slightly (this drive and the distributor drive are interrelated).

Because this gear is under suspicion, that's why I went to buy a new oil pump thinking it would come with it because the only gear listed as a separate part is for the PL engine code (plus, there's no harm fitting a new pump anyway). It's critical that this issue is solved because otherwise, the underlying fault cannot be fixed.

If the worst comes to the worst, is it possible to remove the old gear and re-attach to the new oil pump drive (I have the new dowel fixings from VW ready to do this)?

[PeteGLi]

I thought the oil pump was driven from the distributor shaft. The lug on the top of the oil pump mates into a slot in the bottom of the distributor shaft, which, in turn, is driven from the cog on the intermediate shaft.

[jimmy h]

I thought the oil pump was driven from the distributor shaft. The lug on the top of the oil pump mates into a slot in the bottom of the distributor shaft, which, in turn, is driven from the cog on the intermediate shaft.

I agree with Pete on this, I know that is the set-up on EG code engines for a fact - and I know the basic layout on timing arrangements/configurations was pretty identical across the CC range on 1.6 upwards..

[hiltow]

I thought the oil pump was driven from the distributor shaft. The lug on the top of the oil pump mates into a slot in the bottom of the distributor shaft, which, in turn, is driven from the cog on the intermediate shaft.

Good point - you and jimmyh have made me think about this and believe you may well be right - well done! I've undone the packaging for the new oil pump and noted the lug on the drive of the shaft. Haynes doesn't mention anything about this, but there is a picture of the cog on the distributor in there which would fit the male lug of the oil pump drive.

What's throwing me now is the fact that my car loses it's own timing. The cog on the dizzy has been checked before and the whole innerds of the distributor have been renewed. Dizzy is securely clamped and does not move. Timing marks at the belt end remain in alignment.

Seems a poor system though, having the critical oil pump rely on the distributor like that.

[mark1gls]

Guess thats why VW fitted a loud buzzer and a flashing light to the dash if anything happens to the oil pump and the pressure drops.