review of oil pump cover wear - Defender Source
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  #1  
Old May 6th, 2012, 09:12 AM
flananuts
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Matthew
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review of oil pump cover wear

I'm doing a rebuild on my oil pump with a melling high volume set and I wanted to get opinion on the wear showing on the front cover. thoughts?
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  #2  
Old May 6th, 2012, 09:39 AM
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J. Michael McCaig
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It's hard to tell from the picture but it looks like lines from the original machining are visible through most of the polished area and there is no wear ridge at the edge of the polished area. It does not look like significant wear to me and I would most likely continue to use the front cover.
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Old May 6th, 2012, 09:43 AM
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Matthew
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Thanks, what I noticed was the lower right area which is quite shiny and what I would call ground in. There is no wear ridge noticeable. If I need to take a more detailed picture of that area, I can definitely do so. Also, does the pressure relief valve itself come out? Right now, only the bolt and spring are out.
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Old May 6th, 2012, 02:17 PM
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Is that a gouge right about 12 o'clock?

Aside from that - I agree with Mike, clean it up real well and reinstall. If you have to mess with it, you can do the plate of class, cutting oil, and superfine wet/sand paper with the figure 8 motion to true the surface up.
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Old May 6th, 2012, 09:01 PM
flananuts
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Matthew
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Hey Dave, that is indeed a circular gouge in the cover. It's not dramatic but it's there. From what I understand it's the clearance between the gear and the walls of the cover where loss of pressure happens. Appreciate your input.
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Old May 6th, 2012, 09:13 PM
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I think it looks worse than it is from the flash of the camera, when I replaced the gears in my Classics oil pump the housing looked like that. How many miles are on your truck?
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Old May 6th, 2012, 09:19 PM
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Dont know if you read the manual for the oil pump. Before you put everything back together fill the oil pump housing with petro jelly so it wont run dry for those first few moments.
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Old May 7th, 2012, 06:19 AM
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Thanks Bill, I did catch that. I plan to also manually run the oil pump with my drill first to ensure I'm flowing oil before I put the valve covers back on. With also much of my engine removed, now would be the time to consider the TDI

Phil, 80k. One other note- the timing cover gasket on the drivers side near the top of the motor was largely nonexistent when I pulled off the cover.
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Old May 9th, 2012, 08:00 AM
flananuts
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So a bit of a problem at the moment. I cannot get the pressure relief valve out of the oil pump cover. Anyone have any suggestions?
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Old May 9th, 2012, 10:44 AM
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not sure how they go together. is the ball staked in? as for the pump cover wear, there should be a spec given and you can check it with a feeler gauge and straightedge. The wear you have is not going to get any better, that would be one way of thinking about it. Wear in the cover increases end float in the gears increases the backlash between the gears, decreases oil pressure.

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Originally Posted by flananuts View Post
So a bit of a problem at the moment. I cannot get the pressure relief valve out of the oil pump cover. Anyone have any suggestions?
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  #11  
Old May 9th, 2012, 03:09 PM
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I got the valve out and need to do some cleaning. There was definitely some gunk build up so as soon as I do that I'll look further. The land rover docs talk about checking the gears and the timing cover but it doesn't discuss the oil cover. I did find a possible after market cover but it doesn't look like it has a place for a temp sensor or pressure sender. I emailed the company to get some feedback. I think it is called silver-seal.com.
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Old May 9th, 2012, 08:16 PM
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Usually there is an end float spec on one of the gears that is obtained with a feeler gauge and straightedge across the tops of the walls of the gear housing. Then you add the depth of the gouge in the cover.
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Present:
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Past:
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Old May 10th, 2012, 06:26 AM
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Thanks and congrats in making it to game 7.
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  #14  
Old May 10th, 2012, 01:17 PM
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go caps
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