Blowing oil filter seal on motor.

2594 Views 40 Replies 10 Participants Last post by Fyhr Factor, Sep 21, 2008

90nova

Discussion Starter · Jun 13, 2008

Just got a new "project" boat which is turning to be worse than I could ever imagine.Just got one of the motors ready to fire up last night and ended up getting an oil shower :angry1: Upon start up the oil filter seal blew off the filter and sprayed oil about 15ft in the air and all over the boat.I replaced the filter thinking maybe I had left the old one loose and it did the same thing.I did not have time to check the oil pressure gauge because it happens immediately on start up.It has a remote filter on mounted on top of the motor.Also noticed that the seal was leaking oil at the filter pad on the block.Looking for some thoughts on this.The motor hasn't been run in 3yrs,could the oil pump relief be stuck causing excessive pressure or maybe a blockage in the lines?

1 - 20 of 41 Posts

Mkos1980

· #2 · Jun 13, 2008

Do you still run the stock bypass? There should be one in the pump and one in the filter housing thing.

DonMan

· #3 · Jun 14, 2008

Are you 100% sure that you are using the correct filter ?

What is the brand / part # ?

90nova

Discussion Starter · #4 · Jun 14, 2008

The filter is a Fram PH5.The motor is a factory merc 420 that is coupled to a borg warner 72c tranny.I was thinking about removing the remote filter and oil cooler and just screwing the filter directly into the block.What is the direction of flow,does the oil go to the filter or cooler first?

Fyhr Factor

· #5 · Jun 14, 2008

90nova said:
What is the direction of flow,does the oil go to the filter or cooler first?

Depends on who installed it,,, just look at the oil filter adapter on your engine, follow the the hose connected to the center fitting, if it goes to the remote filter, then your oil is cooled before the filter, if not, it's vise versa..

90nova

Discussion Starter · #6 · Jun 14, 2008

Thanks,just checked and it goes through the cooler first.

DonMan

· #7 · Jun 14, 2008

90nova said:
The filter is a Fram

There`s your first clue. Fram filters are JUNK. But, I doubt that is the sole reason that you`re blowing gaskets out.

Maybe you should try a Wix Racing filter. Part number would be 51060R. They have a 500 psi burst rating.

90nova

Discussion Starter · #8 · Jun 15, 2008

Thanks alot for the info.I will check the piping against the other motor.I will be pizzed off if it is wrong.I was told that the motors were fine and only manifolds were in need of replacement.So far the list of items that I have found wrong are rivaling santa's list! The remote filter looks to be factory,it has a mounting base built into a plate on top of the tranny.Thanks again for the help I will post when I find the problem.

Fyhr Factor

· #9 · Jun 15, 2008

cfm said:
What if your 'in' oil line is connected to the out on the remote filter adapter. And say, maybe, the filter has a check valve/anti'drainback valve. Would the filter basically try to stop all the flow and thus creat the extra psi and bust a move?

I dunno, never tried, and never will. But I'd check the oil line routing throughout. This wouldn't be near the first person to mix up oil line routing.

True, That sure would be something to consider.. wouldn't be the 1st time someone mixed up the routing.., easy to check though, most are marked In & Out on the Remote housings & adapters..

90nova

Discussion Starter · #10 · Jun 15, 2008

I will try to look for markings,the engine bay is really tight, I had to hang upside down to see the leak at the filter pad on the block.

Fyhr Factor

· #11 · Jun 15, 2008

90nova said:
I will try to look for markings,the engine bay is really tight, I had to hang upside down to see the leak at the filter pad on the block.

The fitting in the center on the engine adapter is the IN. (filtered) .to the engine, the other off center fitting is OUT from the engine (thats your pressure side from the pump)

RSCHAP1

· #12 · Jun 15, 2008

What about sticking check valves...?

DonMan

· #13 · Jun 15, 2008

cfm said:
What if your 'in' oil line is connected to the out on the remote filter adapter. And say, maybe, the filter has a check valve/anti'drainback valve. Would the filter basically try to stop all the flow and thus creat the extra psi and bust a move?

Great call Scott. I agree here, if the anti-drainback valve has enough strength to hold off say, 50 psi, then there is no place for the oil to go. The oil filter gasket would be the weakest link.

90nova

Discussion Starter · #14 · Jun 15, 2008

Here are some pics of the set up.looks to be factory,both motors are piped the same.The pics of the piping are from the other motor that I don't have manifolds for yet.Where would the check valves be.I can't fit the filter on the block because of lack of clearance at the oil pan.

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90nova

Discussion Starter · #15 · Jun 15, 2008

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90nova

Discussion Starter · #16 · Jun 15, 2008

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90nova

Discussion Starter · #17 · Jun 15, 2008

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Fyhr Factor

· #18 · Jun 15, 2008

By-Pass Valve is in the adapter on the engine, so you will need to remove the adapter, off-course it's probably not in the most convenient place, right...??
now seeing your set-up, the hose thats going straight-up should be your return to the engine (in) on adapter , and (out) on the remote filter housing, but it should be marked to confirm that..

90nova

Discussion Starter · #19 · Jun 15, 2008 (Edited)

I removed the adapter and checked this spring,it was ok.Also noticed how milky the oil is,guessing on a cracked block or oil cooler. :angry1: The piping arrangement looks right to me.The line that goes straight up to the remote filter is the outlet from the oil pump and feed the outside of the oil filter.I blew through all the lines and they are clear.Gonna try another filter and try starting it again,not sure what else to check.

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90nova

Discussion Starter · #20 · Jun 15, 2008

Well just tried it again with the 3rd filter.At 900 rpm the oil pressure gauge pegs past 100psi and the oil filter seal blows out.Guess I need to pull the engine and take apart to see what is clogged.

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