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Hello, have a 557 big block ford in my jetboat, Im having a problem with large amounts of oil in the bilge of the boat after a long run on the lake.

Heres some details ford motorsport block, crower billet crank and rods, LSM 55 mm roller cam, jesel lifters, kaase worked scj heads, danny b belt drive, tunnel ram with 2 gary williams dominators, compression is about 9 to one. makes 752 hp and about 730 ft lbs torque on the dyno. Motor works fantastic except for this oil leakage problem. Oil does not leak when sitting with motor off. Oil temp is about 230 in pan and 190 going into engine out of the cooler.

The funny thing is motor does not leak oil on dyno, or when we pressurize oil gallies with drill. It has a brand "D" 14 quart pan, with an oslon oil cooler, oil always seems to be coming out the crank area of block {flywheel side}. Im thinking since the ford has such a small main seal that oil from the pan is running up the back and putting a lot of oil around main seal. hence the leaking.

Im thinking I may have to lengthen windage tray to help control oil sloshing up back of the pan when accelerating or ????
Also motor has a kaase oil pump and two valve cover breathers, one on each cover. I am going to a puke tank and a larger hose set up to see if makes any difference when spring time rolls around. Running rotella 15/40 oil.

So, i guess im just looking for thoughts and opinions on this, if any one else has had problems like this. Thanks
 

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Bostick Racing Engines
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Hello, have a 557 big block ford in my jetboat, Im having a problem with large amounts of oil in the bilge of the boat after a long run on the lake.

Heres some details ford motorsport block, crower billet crank and rods, LSM 55 mm roller cam, jesel lifters, kaase worked scj heads, danny b belt drive, tunnel ram with 2 gary williams dominators, compression is about 9 to one. makes 752 hp and about 730 ft lbs torque on the dyno. Motor works fantastic except for this oil leakage problem. Oil does not leak when sitting with motor off. Oil temp is about 230 in pan and 190 going into engine out of the cooler.

The funny thing is motor does not leak oil on dyno, or when we pressurize oil gallies with drill. It has a brand "D" 14 quart pan, with an oslon oil cooler, oil always seems to be coming out the crank area of block {flywheel side}. Im thinking since the ford has such a small main seal that oil from the pan is running up the back and putting a lot of oil around main seal. hence the leaking.

Im thinking I may have to lengthen windage tray to help control oil sloshing up back of the pan when accelerating or ????
Also motor has a kaase oil pump and two valve cover breathers, one on each cover. I am going to a puke tank and a larger hose set up to see if makes any difference when spring time rolls around. Running rotella 15/40 oil.

So, i guess im just looking for thoughts and opinions on this, if any one else has had problems like this. Thanks
One thing to consider since it doesn't leak on the dyno... have you checked not the rear main seal but the rear pan hoop? Typically an engine on a dyno sits kinda level where as it sits at quite an angle towards the rear in a jet boat (typically in the 5* range). Not discounting the rear main idea... just another area to consider that can often times be mistaken as a rear main seal leak.
 

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Hello, have a 557 big block ford in my jetboat, Im having a problem with large amounts of oil in the bilge of the boat after a long run on the lake.

Heres some details ford motorsport block, crower billet crank and rods, LSM 55 mm roller cam, jesel lifters, kaase worked scj heads, danny b belt drive, tunnel ram with 2 gary williams dominators, compression is about 9 to one. makes 752 hp and about 730 ft lbs torque on the dyno. Motor works fantastic except for this oil leakage problem. Oil does not leak when sitting with motor off. Oil temp is about 230 in pan and 190 going into engine out of the cooler.

The funny thing is motor does not leak oil on dyno, or when we pressurize oil gallies with drill. It has a brand "D" 14 quart pan, with an oslon oil cooler, oil always seems to be coming out the crank area of block {flywheel side}. Im thinking since the ford has such a small main seal that oil from the pan is running up the back and putting a lot of oil around main seal. hence the leaking.

Im thinking I may have to lengthen windage tray to help control oil sloshing up back of the pan when accelerating or ????
Also motor has a kaase oil pump and two valve cover breathers, one on each cover. I am going to a puke tank and a larger hose set up to see if makes any difference when spring time rolls around. Running rotella 15/40 oil.

So, i guess im just looking for thoughts and opinions on this, if any one else has had problems like this. Thanks
Might be a good idea to put some oil dye in the system and actually finding where the oil is really coming from......

But then again..it is a Ford, and i have been told that Ford and Harley's
are kinda the same....if they aren't leaking oil,
must be time to add some:p:)grn
 

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But then again..it is a Ford, and i have been told that Ford and Harley's
are kinda the same....if they aren't leaking oil,
must be time to add some:p:)grn

It's not an FE :|err




If you can pull it out use the shop-vac on blow with some soapy water to locate it.

Does it leak oil with only 12 qrts in it?

S CP :D
 

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Bostick Racing Engines
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It's not an FE :|err




If you can pull it out use the shop-vac on blow with some soapy water to locate it.

Does it leak oil with only 12 qrts in it?

S CP :D
Come to think of it... this topic has been covered before...


Dude... that's not a leak... Fords do not leak... it's called Normal Operating Freshness Seepage... its there plain as day in the Ford Service Manual....

"... what may to the untrained eye be an oil leak, as Ford products do not leak this is most certainly not the case. For several decades now, FoMoCo drive train components feature a tried and tested unique feature to assure fluids are fresh, this feature is known as the "Fluid Freshness Seepage". It assures that all fluids in FoMoCo component have fresh fluid in at all times. Normal operation of this feature will show puddles, wet spots, drips, and other signs of what may be consider “a leak”, but this is merely the proper operation of this feature. Normal operation only requires that the fluid levels be topped of and maintained and that filters be changed at their indicated interval. If fluid seepage is not present, this indicates either the fluid level has dropped below acceptable levels and must be replenished, or it is not working properly and must be taken in to an Authorized Ford Service Center for proper repair, service, and/or calibration. Never attempt to alter, modify, or change the operation of this feature as it will void any warranty expressed or implied.”1

See… Chevy guys worry about leaks from time to time… and try to fix them. With a Ford… it’s built in and supposed to be there.




1. FoMoCo Service Manual, Dearborn, 2009 Pgs 203-204
 

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Discussion Starter #6
It's not an FE :|err




If you can pull it out use the shop-vac on blow with some soapy water to locate it.

Does it leak oil with only 12 qrts in it?

S CP :D
she leaks no matter how much oil is in it, Also I've never heard the term pan "hoop", what is that ?
 

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Bolts?

Any chance the coupler bolts are too long?.....Looks like they would press against the seal.....Ray
 

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Any chance the coupler bolts are too long?.....Looks like they would press against the seal.....Ray
checked all that, all good. I just dont know if oil temp gets hot enough on dyno to simulate conditions, same with rake of motor. I think im going to pull pan and look a the distance between widage tray and rear of motor, may have to lenghten windage tray to seal around back of pan area better. I have never really been happy with pan "D" the way it fits and the control of oil, id like a pan that makes more hp too. I dont know if stephs makes a pan for a bbf, just my thoughts
 

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Its possible....

checked all that, all good. I just dont know if oil temp gets hot enough on dyno to simulate conditions, same with rake of motor. I think im going to pull pan and look a the distance between widage tray and rear of motor, may have to lenghten windage tray to seal around back of pan area better. I have never really been happy with pan "D" the way it fits and the control of oil, id like a pan that makes more hp too. I dont know if stephs makes a pan for a bbf, just my thoughts
Its possible for a jet pump mis alignment to push things sideways/forward. Check the rear main for excessive wear, and/or the thrust surfaces......Ray
 

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Its possible for a jet pump mis alignment to push things sideways/forward. Check the rear main for excessive wear, and/or the thrust surfaces......Ray
Jack at mpd did pump install and setup, but i will check it on reinstallation. thnaks
 

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. I dont know if stephs makes a pan for a bbf, just my thoughts







Yes they do make a BBF pan :)grn

If you pull the engine, before you pull things apart to find the leak reverse flow a shop vac into a valve cover and put soapy water on the pan(seal the rest of the engine) the soapy water will show you where the leak is coming from.

When you put the engine back together use a bead of RTV on the pan.

S CP :D

Big Inch Ford lover
 

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Yes they do make a BBF pan :)grn

If you pull the engine, before you pull things apart to find the leak reverse flow a shop vac into a valve cover and put soapy water on the pan(seal the rest of the engine) the soapy water will show you where the leak is coming from.

When you put the engine back together use a bead of RTV on the pan.

S CP :D

Big Inch Ford lover


Motor looks clean Jon , you want to come over and detail mine?:D
 

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Well after some more messing around, we found problem, bad main seal. We put compressed air in oil galley but nothing at first, rotated engine and wham-o air came gushing out. Dont know what caused the seal to go bad, just looked real abraided in one spot. Back together and back to the lake!
 
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