Oil Pump Query

[Dan318-is]

ok rebuilding my M20 lump no a very tight budget now

was wonedring if i should repalce the oil pump. I no its only 47 quid but thats a lot of money to a student like me

the current one has no play and seems ok

what did all the people who have rebuilt theres done?

[M5pilot]

Leave it.

[Dan318-is]

i think i mite just do that

any other thoughts?

[jaistanley]

Seriously? The oil pump is pretty fundamental. I ALWAYS change them when re-building an engine.

I haven't any experience of the M20 though, I know they are good for high mileage.. I'd still change the pump whilst I was there.

Jai

[Dan318-is]

thats what i thought, an its what most lecturers have told me

but i looked at the gears an they are hardly worn at all. iv cleaned the filter out too. 50 quid for a new one is a stupid amount of money to a broke student like me.

also its pretty easy to change at the end i spose i could just drop the sump and whip the three bolts off?

hm decisions

[Brianmoooore]

Seriously? The oil pump is pretty fundamental. I ALWAYS change them when re-building an engine.

I haven't any experience of the M20 though, I know they are good for high mileage.. I'd still change the pump whilst I was there.

Jai

Any other engine doesn't have BMW written on it though.
Most engines, I would change it as a matter of course, but BMW ones last pretty well.

[Dan318-is]

as i thought brian; iv never heard of an oil pump going on one

i will take your advice i think im on such a tight budget

thanks people

[Demlotcrew]

Its not that they "go" but they will become weak over time and wont produce the higher pressures.

Andrew

[E30cabalan]

I am rebuilding an M20 325 engine at the moment and I would agree with Brian that the build quality of the original oil pump is far superior to any Ԛ£50 replacement. How many zoners do you hear complaining about oil pressure problems in high miler six pots?
If you are going to replace it do so with a BMW original part. Really we are talking about the heart of the engine here.
For the record I will be keeping my origional oil pump.

[Demlotcrew]

Many six potters here dont have oil pressure gauges in their cars. And if you knew the trigger pressure of the stock idiot light then you would understand why when the light comes on its too late.

But saying that, not many M20 spin the barings or have oil starvation issues. So i would also say keep the BMW pump and donÔš't buy the Ԛ£50 Euro crap.

Andrew

[Dan318-is]

the masters have spoken

[Turbo-Brown]

I replaced the pump on mine (200K) 2.5 when I rebuilt it.

They cost Ԛ£90 from the dealers which for the peace of mind they give (and 40psi of oil pressure on hot idle) I'm glad I did it

[Dan318-is]

but then again yours is turbo so under more strain surely?

an im on a stupidly tight budget as mentioned!

[Brianmoooore]

I replaced the pump on mine (200K) 2.5 when I rebuilt it.

They cost Ԛ£90 from the dealers which for the peace of mind they give (and 40psi of oil pressure on hot idle) I'm glad I did it

If I was rebuilding a 200k engine, (to do another 200k), then I might consider replacing the pump and its drive.
Obvious thing to do I suppose is check hot oil pressure before the rebuild. If p[ressure holds up with a worn engine, then the pump is good.

[Dan318-is]

i checked the two gears an there was itny bits of wear on a few of the teeth, but nothing without examining it closely

filter was clocked were oil hadnt been changed

engine has clocked 130 miles

[Turbo-Brown]

but then again yours is turbo so under more strain surely?

an im on a stupidly tight budget as mentioned!

Fair point, it's not really under more strain, but it does have more things to supply than normal.

Like Brain says though, definately worth replacing the little drive shaft. They're about Ԛ£3 or 4 from the dealer

[Dan318-is]

which driveshaft, not the gears?

part number anyone? my ETK no work anymore

[Turbo-Brown]

It's part 10 in the diagram:

http://www.realoem.com/bmw/showparts.do ... g=11&fg=30

Just a little hexagonal shaft pressed into a sleeve (mine came with the two parts 11

Actually it looks as though you can buy just the gears if they were a concern.

[Dan318-is]

the gears are a good 15 quid each from bmw i think or around that

il ring tomorrow n check but im pretty sure if im replacing the gears i mite as well reaplce the pump?

i think il keep the old one and replace the shaft

thanks a lot!

PS aldershot isnt far from me!