[JZA80RR]

yes i did search..
i did read all post about crank walk an blown FMS,
fms starts to leak,on my rebould 2jzgte aristo engine,so i put in a new oem,drove for som time an then,that ring also starts to leak...

i was fear of crankwalk so i replaste the set of crankshaft thrust washer
even that the old one did se good out,and the cranc is not mouving
so i bought a new PHR oilpump,put a new oem ring in and put oilpump/oil pan's in place

so the next day i try to start op the car hopefully...
oilpressure is good when cranking and what happens when it starts up, yes oil leak again from the FMS :blast:
after max 2 min with 1000--->1500 rpm

what shoud i du ?? whan is wrong ??

 

[Kwiktoy]

Are you sure the new seal went in absolutely squarely?

 

[scarface007]

to much crankcase pressure ? maybe blow by . impropper install of the timing gear or crank pulley .

 

[DentGuy]

Its possible that you plugged the oil drain hole with silicone when you put the oil pan on. Check to make sure that hole is clear, if it isn't just the slightest buildup of oil pressure will push right out the FMS before triggering the internal pressure release. Also make sure you dont bottom out the seal against the oil pump housing, just put it in far enough so the face of the seal is flush with the pump housing.

Hope this helps Bob

 

[Vu]

Don't take this the wrong way, but are you positive that it's the FMS that's leaking? It could be one of your cam seals and the oil is dripping down to where the FMS is. Take off the cam gears and No.5 timing plate and double check.

 

[exvelocity]

Did you check the crank where it comes in contact with the seal? It may have worn a groove or someone could have damaged it when pulling the old seal

 

[RogueSupra]

Kinda shocked no one asked if you checked or replaced your..... wait for it... PCV... yes the Pressure Check Valve... its on the driver side or Right side valve cover... You said you have a Aristo motor so there is no way to know how old the PCV is and if its working at all... and the PCV is like a $5 part... the Grommet is another few bucks I think as well. This could be your problem.

 

[JZA80RR]

thank you all for helping me
the fms is mountet right and the face of the seal is flush with the pump housing, timing gear and crank pulley are also in right order
its not the cam seals,the crank looks good and no groove where the fms goes
i am running open filters on the valve cover's (PVC on the left valve cover is removed and a bigger size alu pipe is welded on for the open filter) so both side's are "breating" good

am i left with to mutch crankcase pressure from blow by then ? (if the oil drain hole not is plugged with seal fron the oilpan)

 

[kuzi]

also if you have a single disk clutch that is rated for high (800) horsepower
you could have this problem on start up
i have heard that the general li supra has this problem a lot
sollution bypass the clutch among start up or go with a twin or triple disk clutch

 

[DentGuy]

Its not crankcase pressure, its oil pressure. I was having a similar issue with my car and I also thought the crank case pressure was causing my FMS leak. After talking with Jerry at SP he informed me that he has seen high boost Supras crack ring lands on the dyno (pressurizing the crankcase like crazy) and not pop a front main seal. Is the oil pump brand new? did you just rebuild the engine? If so then I would make sure the drain back hole is clean and clear. If there is any excessive internal pressure in the oil pump it will push past the FMS easily. Also make sure the spring on the back didn't fall off, also you can use the spring off your old FMS and add it to the new one (it will hold a little tighter).

 

[JZA80RR]

Its not crankcase pressure, its oil pressure. I was having a similar issue with my car and I also thought the crank case pressure was causing my FMS leak. After talking with Jerry at SP he informed me that he has seen high boost Supras crack ring lands on the dyno (pressurizing the crankcase like crazy) and not pop a front main seal. Is the oil pump brand new? did you just rebuild the engine? If so then I would make sure the drain back hole is clean and clear. If there is any excessive internal pressure in the oil pump it will push past the FMS easily. Also make sure the spring on the back didn't fall off, also you can use the spring off your old FMS and add it to the new one (it will hold a little tighter).

the PHR modded oem oilpump is brand new yes, engine was rebuild last year,but been driven all last summer with it
how can it be oil pressure if the oil pump and fms is brand new ??

i did see some blue smoke on high rpm enginebraking/vaakum when i was on the dyno a month ago so it might be a bad piston ring making high crank pressure...?
i got a SPEC 3 clutch,but when i started it up car was in neutral and clutch was not pressed down

 

[DentGuy]

I highly doubt this is a crankcase pressure issue. did this leak start after installing the oil pump? or just randomly one day. If that seal is installed even a little crooked it will leak right away

 

[Rich B]

And al this time, I thought PCV meant "Positive Crancase Ventilation"

 

[93na]

ill second that. PCV does stand for Positive Crankcase Ventilation. It does incorporate a check valve known as the pcv valve. I would think from that high of crankcase pressure you would be having issues elsewhere before the FMS.

 

[JZA80RR]

I highly doubt this is a crankcase pressure issue. did this leak start after installing the oil pump? or just randomly one day. If that seal is installed even a little crooked it will leak right away

the motor was rebuild last year, after a while it become damp from the fms,so i did change the seal,but it become damp again,so now i did put in a new PHR oilpump and new fms,and 2 min after i started it up it now oil is flow'ing from the fms...

i woud hate to do the fms job for the 3 time just to pop another seal again

eny ides ?

 

[DentGuy]

I would call Power house, I hate to say it but there may be an issue with that pump. There seems to be to much pressure building up behind the FMS, there could be an internal pressure release problem as well

 

[OcLpRk8699]

Your pcv valve plays a big part in creating suction in the lower crank case allowing your rings to properly seal to the cylinder walls. typically the valve doesnt break though, a lot of people like to eliminate them altogether which is a terrible idea especially with a turbo car. Oil pressure btw would NOT play a part in the front main seal going bad. Its simply not a pressurized area by the oil pump its only an area where oil flows. We should note oil in the crankcase typically JUST sits level right at or below the front main seal. My guess is bad rings causing excessive blow by. Even then it takes a LOT. I had a 7m with a 1" diameter hole in cylinder 6 and it popped my front main seal right out of engine.

 

[JZA80RR]

I would call Power house, I hate to say it but there may be an issue with that pump. There seems to be to much pressure building up behind the FMS, there could be an internal pressure release problem as well

well as i did hav problem with the fms on the old pump and the new phr oilpump i start to wonder if it might be bad piston ring...

 

[DentGuy]

well as i did hav problem with the fms on the old pump and the new phr oilpump i start to wonder if it might be bad piston ring...

Crankcase pressure is not causing this.

 

[OcLpRk8699]

Crankcase pressure is not causing this.

i'm not trying to question you or anything but how can you be so sure?

Aside from the fact that he would be burning mad oil...