oil pressure relief valve
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- Posts: 23
- Joined: April 30th, 2008, 8:29 pm
oil pressure relief valve
I want to check the condition of the oil pressure relief valve and want to know what is the best way to remove the screw from the engine block? Is there a special tool or do I just need to get a really big screw driver?
Re: oil pressure relief valve
Try a cold chisel or punch on the corner of the slot. Should open.
Plunger ( relief valve) should fall out along with the spring and some oil.
Use a new gasket when installing.
Dietmar
http://www.quixoteracing.com
Plunger ( relief valve) should fall out along with the spring and some oil.
Use a new gasket when installing.
Dietmar
http://www.quixoteracing.com
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Re: oil pressure relief valve
OR.. you can fashion a perfect flat blade out of 1 X 1/8" flat stock. Then use a crescent wrench to twist your blade.
Weld or braze a nut on the end of the threaded plug to make it easy to remove next time.
Brian
Weld or braze a nut on the end of the threaded plug to make it easy to remove next time.
Brian
Re: oil pressure relief valve
A word of caution using teh chisel method on the screw. Depending on how tight it is, you may end up with a dimple on the sealing washer surface. It will not seal well when that happens, so be aware. I'd recommend machining or replacement if that happens, AND as Brian suggests, weld or braze a 13 mm nut on the bottom and removal will be very easy. BTW: you can buy aftermarket plugs with a recessed hex and they aren't that expensive.
-Jim
-Jim
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Re: Oil pressure Relief Removal
Craftsman (#009-34299), Drive Drag Link Socket Set, this is a set, or try to locate a single socket. Works great.
John
John
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Re: oil pressure relief valve
I have used all those techniques. An additional and very effective way is to use an impact driver or impact screwdriver. Not sure of the proper name but you hit this spring-loaded screwdriver with a hammer. Usually works first hit with no damage to anything. I expect the recommended socket would work on the impact driver for the perfect solution.
Greg Rice
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- Posts: 23
- Joined: April 30th, 2008, 8:29 pm
Re: oil pressure relief valve
I got the valve out with a cold chisel and hammer. It took a couple of hits to get it turning but came out pretty easy. I'm going to replace them with the allen head screw I saw on CB Performance's website.
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Re: oil pressure relief valve
I have had a Craftsman pc. that fits a 1/2" ratchet or extension and works perfectly. Got it about 40 yrs. ago, and don't have a part # for it.....sorry. If need be, I fit it on one of the old "slam hammer" style impact tools to break the screw loose. I agree on not liking the chisel....got a drawer full of ruined screws.
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Re: oil pressure relief valve
The stock spring may be too weak for many Vee engines. They're designed to bypass the oil cooler if the oil pressure is too high.
Re: oil pressure relief valve
If you do decide to put a stronger spring in either of the pressure valves, be very careful with the RPM on a cold morning session. A vee engine can push over 80 psi when cold at high rpm and blow a cooler or filter seal very quickly. I wait until I get some temp before running the engine all the way up.
The above post is for reference only and your results may vary. This post is not intended to reflect the views or opinions of SCCA and should not be considered an analysis or opinion of the rules written in the GCR.
Re: oil pressure relief valve
My "special" tool for this is a very large washer that will fit tite in the groove, with a small vise grips clamped to it at a right angle, might have to grind the washer some for fit. Works great.
Hal
D-13 88
Citation 88
Hal
D-13 88
Citation 88