oil pump to engine faces

[dimma]

would there be any oil pressure loss where the pressure side of the pump bolts to the block? im building an f7p and was thinking of recessing around the hole of the pump to fit an o ring.would it be worth doing? http://i268.photobucket.com/albums/jj39/dimmaclio/photo_zpsb2b4c658.jpg (http://s268.photobucket.com/user/dimmaclio/media/photo_zpsb2b4c658.jpg.html) http://i268.photobucket.com/albums/jj39/dimmaclio/photo_zps19547a85.jpg (http://s268.photobucket.com/user/dimmaclio/media/photo_zps19547a85.jpg.html)

[diditno]

No. Renault dont do it so i wouldnt bother.

[dimma]

To look at the block face I would think there's got to be some pressure loss because it isn't machined totally flat.im doing a turbo conversion on this and I'm trying to get as much pressure as possible

[diditno]

Didn't bother when mine was turbod and had no issues. You can always use a sealant when fitting it to give it a seal but not worth it imo

[dimma]

I bolted the pump on today and with filter removed and oil pump full of oil I put the end of a finger over the hole that supplies the filter with oil and turn the oil pump drive shaft wheel repeatedly and there is some oil leaking from where the pump meets the block so I'm going to fit a seal there.its got to give more oil pressure with that sealed up.

[dimma]

I recessed the pump,fitted an o ring then bolted the pump on and there's now no leaking at all.im happy with that,it's a much better job now.

[dimma]

http://i268.photobucket.com/albums/jj39/dimmaclio/photo_zps1b3f1b8b.jpg (http://s268.photobucket.com/user/dimmaclio/media/photo_zps1b3f1b8b.jpg.html)

[Vandella]

Good job mate! did you have a pressure reading before this? or have u generally started from scratch on this engine?

[dimma]

Good job mate! did you have a pressure reading before this? or have u generally started from scratch on this engine? I'm building the engine from scratch.new mains and big ends and I've also replaced the oil pump drive shaft bushings that are pressed into the cylinder block.hopefully will have super oil pressure, the last turbo conversion I did ended up with not that much oil pressure and after a while it would bring on the oil light when warm on tick over.

[dimma]

Would it make any difference to the engine to leave the sump oil splash guards that fit to the bottom of the engine and inside the sump off?

[Chris H]

I always use sealant on them, on any engine I build that has that setup I use sealant. Vags used to be like that but went to an o-ring in the same style you have done. If you leave the guards off then the oil will splash up to the crank on cornering. Its not advisable.

[dimma]

Would there be anything wrong with to much oil pressure?

[Chris H]

Would there be anything wrong with to much oil pressure?

You won't get too much pressure. The relief valve takes care of it. The pump is a simple device, it is always putting out what it can the only way to increase its output is to spin it faster. The relief valve just bleeds off oil back.

In the rare case of a stuck relief valve so you get high oil pressure the oil filter can explode which leaves a mess, usually never in passenger cars but happens in hgv's now and again. The hydraulic tappets pump up and open the valves so the engine dies. Seals etc don't leak as no seal is under oil pressure its crankcase pressure that pops seals out or worn seals weep.

The other issue is with the actual oil filter, I mentioned they can blow off but the oil filters have an internal bypass so the paper element doesn;t collapse and go through the oilways blocking them. When these valves act un filtered oil is put through the system, this isn't a big issue as the oil should be clean anyway, it will get filtered at some point. Cold starts for example will activate most filters valves with the higher oil pressure created by the thicker oil.