look at my oil pump bolt

**Nankas** · 18th February 2010, 10:58 AM

I recently replaced my oil pump bolt. I was just cleaning up and picked up the old bolt that i had removed and cleaned it up a bit. Look at what i found. Instead of putting myself at rest i now have a concern that the thread in the pump is screwed. What are your thoughts as to whether i need to redo the bolt again and possible retap the thread in the pump. Has anyone come across this.

Regards

Nankas
/Users/paulnankervis/Pictures/iPhoto Library/Originals/2010/18:02:2010/DSC_0836.JPG[PHP]

**Graeme** · 18th February 2010, 12:32 PM

My old bolt looks perfect. I'd be replacing the pump, either with a good s/h one or a new one, and as a priority too.

**Nankas** · 18th February 2010, 12:44 PM

Thanks Graeme,

I have started looking into it. So far $600 for s/hand pump and $200 labour. Has anyone had the thread in their pump re tapped. Marty at Deacons recons that the thread in the pump is hardened steel and difficult to re tap.

Regards

Nankas

**p38arover** · 18th February 2010, 01:22 PM

Originally Posted by Nankas

Thanks Graeme,

I have started looking into it. So far $600 for s/hand pump and $200 labour. Has anyone had the thread in their pump re tapped. Marty at Deacons recons that the thread in the pump is hardened steel and difficult to re tap.

Regards

Nankas

If that's the case, the thread in the pump maybe OK.

**Graeme** · 18th February 2010, 02:04 PM

You could remove the new bolt and see if there's any deformation of its thread. If not, the shaft could be OK and the previous (perhaps not original) bolt was overtightened.

**Lotz-A-Landies** · 18th February 2010, 02:12 PM

All I can say is it's a good thing that you have replaced the last one.

You don't get much warning between when the pump fails and the engine is ruined.

**Nankas** · 18th February 2010, 03:34 PM

Yes, i think it might be a matter of doing it all again, inspecting the thread inside the shaft and taking it from there. I will not have peace of mind with this hanging over my head. The question now is will i need to remove the pump to inspect the thread?

**Urban Panzer** · 18th February 2010, 06:08 PM

Was the bolt lose, if it was and it was "chattering" around in the pump, and the Pump is harder steel, that may have "flattened" the thread as well

**Blknight.aus** · 18th February 2010, 06:25 PM

run a thread cleaning tap into the pump housing.

if it screws in by hand to full depth then you have nothing to worry about.

**slug_burner** · 18th February 2010, 07:21 PM

If the replacement bolt has gone in ok I don't know that you are going to get much more info by running a tap. If you used loctite I would be tempted to leave it in there.

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