bmposer

iTrader: (3)

Hi,
Does any body no what the tolerance is for an oil pump on a 1995 wrx?
I have a couple of old pumps and would like to find out if there within spec.
Thanks.
Kieron.

bmposer

iTrader: (3)

Can anyone help?

merlin24

iTrader: (1)

Download the workshop manual from SN member 'slipstream uk' - all the specs are in there Kieron.

Mick

bmposer

iTrader: (3)

Thanks for the advice Mick.
I will get one downloaded and have a look.

bmposer

iTrader: (3)

I have got a workshhop manual but still can find what i am looking for in it.
I would like to no the,

Outer rotor-to-body clearance,
Inner-to-outer rotor clearance,
Rotor endfloat.

merlin24

iTrader: (1)

A quick copy and paste :

1. TIP CLEARANCE
Measure the tip clearance of rotors. If the clearance
exceeds the limit, replace rotors as a matched set.
Tip clearance:
Standard
0.04 — 0.14 mm (0.0016 — 0.0055 in)
Limit
0.18 mm (0.0071 in)

2. CASE CLEARANCE
Measure the clearance between the outer rotor and the
cylinder block rotor housing. If the clearance exceeds the
limit, replace the rotor.
Case clearance:
Standard
0.10 — 0.175 mm (0.0039 — 0.0069 in)
Limit
0.20 mm (0.0079 in)

3. SIDE CLEARANCE
Measure clearance between oil pump inner rotor and pump
cover. If the clearance exceeds the limit, replace rotor or
pump body.
Side clearance:
Standard
0.02 — 0.07 mm (0.0008 — 0.0028 in)
Limit
0.15 mm (0.0059 in)


Mick

bmposer

iTrader: (3)

Thanks for that, just what I needed to no,
The manual I downloaded didn't have that info in.

merlin24

iTrader: (1)

Check the relief valve bore in the pump carefully - any scoring and its scrap.

Mick