I recently bought an oil pump housing from mizumoauto
on ebay. The price was right. We found when installing it that the oil pump sprocket hits the casting preventing it from spinning, possibly bending the sprocket.
We ground down the high spot on the casting only to make a pinhole that needed to be welded and reground. This still was not enough and we had to turn out some of the inside of the sprocket to get it to fit.
Finally, when we went to bolt it to the block, we found that one of the bolts on the back of the oil pump hit the block. Grinding down the block for clearance was scary, but with enough rags and a vacuum we did it safely.
Be sure to check everything if you order a cheaper casting, even if its new, from ebay. I emailed the seller to see if they have heard of anyone else having troubles.
ebay oil pumps
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DJpowerHaus
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ebay oil pumps

Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
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jeffball610
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DJpowerHaus
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It was only $90 shipped. :-/
I then emailed them and asked if they wanted photos.Hi Michael,
I do apologize for that. That is really weird. Let me tell my boss about this problem so he can call up his supplier to tell them about the problem.
Thanks for telling me about the problem.
Thanks,
Helen
Please do supply me with the photos. I hate this oil pump. Too many problems.
Please send it to mizumoauto@hotmail.com
Thanks,
Helen

Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
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DJpowerHaus
- Sir Post A Lot
- Posts: 1779
- Joined: Wed Apr 07, 2004 3:24 pm
- Location: Baltimore, MD
- Contact: