Oil Pump won't fit!

type3 · Post by **type3** » Sat Jan 08, 2005 10:15 am

Haven't touched my engine project for months and decided today to do a bit of spanner turning. I went to fit my oil pump and it wouldn't go on the studs, looked at it for a bit and then I saw the problem...

One of the holes on my Shadek Oil pump is smaller than the others! It's no biggy as I can drill it out. Just a bit odd that one measures 8mm and the other three are 9.1mm. Any one else seen this before?

cheers,
type3

Post by **Piledriver** » Sat Jan 08, 2005 10:19 am

Make sure you have plenty of clearance for the cam bolts...

type3 · Post by **type3** » Sat Jan 08, 2005 10:36 am

Piledriver wrote:Make sure you have plenty of clearance for the cam bolts...

I've had all the necessary work done for the 30mm pump conversion so that side is all sorted. It's just that everytime I've trial fitted it though the case halves have been apart (so only using two of the holes and studs). Today was the first time with the case together so needed all four holes and studs only to find one of the mounting holes in the oil pump was too small! I'll fix it on the drill press tomorrow, just wondered if anyone else has come across this anomaly.

cheers,
type3

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Sat Jan 08, 2005 11:37 am

What cam gear are you using and was it modified for the TI pump as well?

type3 · Post by **type3** » Sat Jan 08, 2005 12:46 pm

MASSIVE TYPE IV wrote:What cam gear are you using and was it modified for the TI pump as well?

Yep, the cam gear has been modified so that the bolts are recessed... but what I'm seeing isn't to do with the oil pump to cam gear/camshaft clearance.

Sorry for the basic drawing, here's what I'm seeing when I measure the oil pump mounting holes:

Odd isn't it?

Easily fixed though.

cheers,
type3

MattKab · Post by **MattKab** » Sun Jan 09, 2005 11:46 am

If the hole centres match and the studs are M8 and straight it should still fit? It would centre the drive dog in the cam better?

type3 · Post by **type3** » Sun Jan 09, 2005 2:03 pm

Hi Matt,
In theory as the smallest hole was 8mm it *should* have fitted the over the corresponding M8 stud.... but it didn't, maybe the hole was slightly offset too? If I rotated the pump 180 degrees (no cam or camgear in the case) the oil pump would slide on a bit then get wedged, same thing if I rotated 90 degrees either way. Turn it to the correct orientation and it just wouldn't want to know at all.

I went to my workshop today and drilled the offending hole to 9mm and now it fits nice and snug. I'm assuming the main body of the pump that slides into the case will keep it centered.

Looks like I got a duff pump casting!

cheers,
type3

VGM · Post by **VGM** » Sun Jan 09, 2005 7:34 pm

Had the same thing on a Shadek pump a few weeks ago.Easy fix but makes you wonder what they will screw up that isnt so obvious next time...

Chris Percival · Post by **Chris Percival** » Mon Jan 10, 2005 4:07 am

Mine was alright. Bit worrying though isn't it?

type3 · Post by **type3** » Mon Jan 10, 2005 12:43 pm

Hi Chris, yeah it is a bit worrying as it's something so simple. How could they get it wrong? I thought Shadek was supposed to be an okay brand!

VGM, sorry to hear that you had probs too, although at least I now know that I'm not going mad... well not yet anyway.

cheers,
type3

VGM · Post by **VGM** » Mon Jan 10, 2005 9:10 pm

No,the fact is there are more than just us, and we have all gone gaga...