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leak on oil pump? #1080327 04/16/16 05:11 PM
Joined: Dec 2003
Posts: 201
T
toyomorph Offline OP
Wheeler
I had to drop the diff and replace an ill advised use of cork oil pan gasket. I cleaned it up and used the good FIPG sealant. Got the leaking oil pan gasket fixed. While observing for leaks I notice some oil pooling up on the underside of the oil pump. Is there a bolt on the oil pump that was supposed to get rtv'd on install? The other two possibilities I can think of is the front main seal is leaking or the rubber seal in the oil pump body got kinked or was not good to begin with. Do you guys concur? Or know of any thing else that it could be? I did use a new main seal just 4K miles ago on the rebuild. I reused the oil pump gasket with pretty low miles on it also. (not much time in service)
Thanks


canyon country explorer
1993 4x PUP
From the Off-Road World
Re: leak on oil pump? [Re: toyomorph] #1080328 04/16/16 05:13 PM
Joined: Dec 2003
Posts: 201
T
toyomorph Offline OP
Wheeler
Also this engine prior to getting honed and correctly installed rings 4K ago did not leak one drop of oil.


canyon country explorer
1993 4x PUP
Re: leak on oil pump? [Re: toyomorph] #1080329 04/16/16 05:36 PM
Joined: Dec 2003
Posts: 201
T
toyomorph Offline OP
Wheeler
Well I wiped it off, started it up and watched. The oil appears to be coming from the seam between the oil pump and the timing cover at the very bottom of the oil pump between the two bottom bolts on it.
Unreal. I have never seen this before. Must be a bad rubber seal in side the oil pump. It is definitely not coming from the front main seal. Thankfully this should be an easy fix.

Last edited by toyomorph; 04/16/16 05:37 PM.

canyon country explorer
1993 4x PUP
Re: leak on oil pump? [Re: toyomorph] #1080330 04/16/16 05:38 PM
Joined: Dec 2003
Posts: 201
T
toyomorph Offline OP
Wheeler
Question? I just added new oil. How much oil to I have to drain so that it will not leak out the front when I take the oil pump off? Anyone know?


canyon country explorer
1993 4x PUP
Re: leak on oil pump? [Re: toyomorph] #1080336 04/18/16 04:50 AM
Joined: Apr 2002
Posts: 3,567
Snowtoy Offline
Roll Me Over
Yesm the bolts are supposed to get some rtv before install. If this is a 22re, the '85 FSM, linked in the FSM section at the top of this board, will show you which ones get the RTV, same with the timing cover bolts.

The seal on the pump is also a common point of leaks with age.


More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed
Re: leak on oil pump? [Re: toyomorph] #1080422 04/27/16 04:27 AM
Joined: Feb 2000
Posts: 6,217
4x4Wire Offline
Trail Leader
***
Once the draining starts it is hard to stop after a presumed measure. A bigger question is can you drain it into a container that you are assured of not contaminating with foreign matter (dust) that could be bad for your engine.


Re: leak on oil pump? [Re: toyomorph] #1080424 04/27/16 05:56 AM
Joined: Apr 2002
Posts: 3,567
Snowtoy Offline
Roll Me Over
Originally Posted by toyomorph
Well I wiped it off, started it up and watched. The oil appears to be coming from the seam between the oil pump and the timing cover at the very bottom of the oil pump between the two bottom bolts on it.
Unreal. I have never seen this before. Must be a bad rubber seal in side the oil pump. It is definitely not coming from the front main seal. Thankfully this should be an easy fix.


There is an o-ring that could have gone bad.
[Linked Image]

If you don't want to drain all the oil, I would crack the oil pump bolts loose, and let it drain into a pan, then top off with fresh oil.


More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed

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