replacing oil pump - questions!

[EatDog]

Going to replace my oil pump, see if it gives the engine any more pressure (which is very low right now)
Is it a straightforward job.... how many hours work? Is there any issues I need to be aware of? And what is the difference between original and aftermarket parts? (when I've looked for parts, a few different manufacturers are available)

[Darth Garry]

Before you go tearing into the pump, have you verified without a doubt that the problem is the oil pump?  Are you positive it's not an electrical problem?  Have you hooked a mechanical oil pressure gauge up anywhere to see how things look?

The actual pump swap shouldn't be too hard.  Make sure you get the shaft lined up properly with the keyway in the vacuum pump dizzy.   I would recommend sticking with OEM, and perhaps a higher volume pump as an upgrade.  Also, some of the different pumps require longer bolts.  Make sure you get them if you buy one of the pumps.  Check out www.germanautoparts.com, they have a good selection.

Oh yeah, this is a good time for an oil pan gasket upgrade too!

Garry

[EatDog]

yes i've checked with a mechanical oil pressure gauge

what kind of oil pan gasket upgrade?

[subsonic]

Is it mech or hydro?  Andrew was kind enough to post the part number for the newer 36mm gear oil pump for the hydro engine.  I dont have it with me right now but if you search his posts with the word 36mm it will come up.

[CoolAirVw]

Here's the thread, I did the search for future generations.

http://www.vwdiesel.net/phpBB/viewtopic.php?t=7071&highlight=36mm

[QuickTD]

Intermediate shaft bearings?

That's where the smart money is. Nothing has an easier life than the oil pump, never seen one wear out. The intermediate shaft bearings, on the other hand, have a hard life and often wear out...

[EatDog]

Yes I also suspect it's the shaft bearings, in which case I will be shopping for a newer engine. By replacing the oil pump I may just be "delaying the inevitable" but if I can squeeze a few more miles out I'll be pretty happy.
 
068 115 105ANZ - so this is the 36mm pump that I need? or.. 028 115 105G? (believe this is for the 1.9TD?)
And... any brand, as long as the gears are 36mm in HEIGHT?

I have an '86 1.6TD

[tylernt]

You might need two longer bolts too, as apparently the entire oil pump housing is taller.

[EatDog]

Oil pumps do wear out!!! - I took the pump out and could barely even see the gears, or hear them turning. However, this one had 499,500km on it, assuming it's the original.

Thanks for the help with the part number!

[CoolAirVw]

Brand to use is Meyle (oem supplier)  Thats the part number from Libbybapa's thread.



Larger gears 36 mm.  Note: The smaller gears in the pic is the 30mm pump.  Vw's first pump had smaller gears than that.  In 85 (I think)  oil pumps were upgraded to 30mm.

[ilomax]

I swear, this is one of the WORST jobs ever....
I can't stand taking off the oil pan.
What is it, like 29 bolts?  Ohhh damn it sucks.

29 damn bolts to take an oil pump out that has two bolts holding it in.

Ohh, you better make sure they are torqued correctly or you'll have some leaks...

I do enjoy having an oil pan baffle.

[rallydiesel]

Will I need longer bolts going from 30 to 36mm? Where would I get these from. There were no bolts with the pump I bought.

[rallydiesel]

Does anyone know the part number for the longer bolts?

[EatDog]

You might not need longer bolts.
I have a 1985 Jetta TD and the bolts fit just fine. If yours is older than 85, it should fit just fine.

I would recommend anyone who's thinking about it, just do it. The pump is quite cheap and it's a 2-minute job once you've got the oil pan off. The oil pan is tricky though, be careful not to strip threads.

[rallydiesel]

It's a 1991. Will the bolts be the same? I don't want to take the pan off only to find out my bolts are too short.