Oil Leak

leroy

leroy

Donating Member
I'm pulling the oil pan on my Syclone today. I have done this 6 or 7 times trying to fix a leak. It appears to be leaking between the front cover and oil pan. I have tried 2 different front covers and 2 different oil pans. The results are always the same. I use new gaskets and grey silicone. Am I overlooking something?
 
sy1907

sy1907

SYCOTIC
Re: Oil Leak

Do you have a pcv system or are you using breathers? Sometimes breathers will not work well on a boost application and you may be pushing oil out of the seals. Just an idea......
 
leroy

leroy

Donating Member
Re: Oil Leak

I thought of that and I'm using breathers. I may go back to PCV's or exhaust powered crankcase ventilation. If I remember right, it started leaking when I still had PCV, though.

Thanks.
Jim
 
myclone

myclone

Donating Member
Re: Oil Leak

Jim,

If youre using a stock one piece molded rubber oil pan gasket and a stock pan/timing chain cover there shouldnt be any leaks (especially after 6 or 7 pan R&Rs).

Are you sure the leak isnt the crank seal in the timing cover? Its not uncommon for a timing cover seal with some miles on it to wear into the harmonic damper as well as the seal itself get some wear on it and start leaking oil down the front of the motor.

Of all things GM has done wrong the one piece oil pan seals isnt one of them and Ive never seen one leak more than an ever so slight amount even after 100k+ miles as long as the oil pan and timing cover were the correct pieces.

BTW, pulling the pan 6 or 7 times with the motor in the truck HAS to be a test of ones sanity. Im finishing up a JS coil over/motor mounts install and noted that you have to practically take the entire front of the truck apart to get the oil pan off with the motor in the truck. No thanks...
 
#2875

#2875

built, not bought
Re: Oil Leak

i have done mine twice now (in the truck) and never any leaks. i only use silly cone on the 4 inside corners and around the radius and only a little bit. oh and i use the black stuff. the grey is for aluminum pans/blocks.
 
#2875

#2875

built, not bought
Re: Oil Leak

btw i use the felpro gasket. its way cheaper than the victor and easier to work with.
 
leroy

leroy

Donating Member
Re: Oil Leak

I'm using the felpro gasket. I have replaced the timing cover seal at least 3 times. I have used 2 different oil pans and 3 different front covers.

Now I have a new problem. I sheared off a bolt in the crankshaft pressing the balancer back on. <sheesh>

Jim
 
leroy

leroy

Donating Member
Re: Oil Leak

It's back together now. No leaks yet, but haven't driven it much. It took a couple of days tinkering to get the broken bolt out of the crankshaft.

Jim
 
Syclone#2960

Syclone#2960

What ever it takes!!
Re: Oil Leak

I was told that the chrome covers are more prone to leaking.
This leak must be pretty common on all rebuilt trucks ( I guess) cause both my trucks leak. A lot of it has to do with high crank case pressure and running breathers instead of PVC's.
Oh yeah...some of the covers from China had a defect with the holes not lining up correctly to the block and causing the cover to either lower or raise a little. Which caused the front seal to wear out quicker from rubbing up against the crank.
 
Daron

Daron

Active member
leroy

leroy

Donating Member
Re: Oil Leak

Daron said:
Hey Jim,
I have considered running this setup also. Do you know anyone who has done it on a syty?
Daron
Click to expand...

My plan is to set it up like the stock pcv system, except run the back one to the exhaust instead of the intake tract. One pcv will always be working when the engine is under vacuum, and the other will work as exhaust velocity picks up. It will keep all the oil out of the intake.

Jim
 
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