My Rx7 is getting a complete new (rebuilt from Mazda). The installer is quiet well qualified rotary mechanic. He currently has both engines out of the vehicle side by side. I am having new (not rebuilt) factory turbos put in. The only part stock on the turbo assembly are the oil return lines. He was explaining to me that the engine will begin to leak oil in two spots. One was the inside oil return line, closest to fire wall, bolting to the block. He said they inherently will start to leak. It would seem there has to be a fix.

DOES ANYONE KNOW OF THIS PROBLEM OR HAVE A SOLUTION?

Now is the time with everything accessible. I am also going to find out where he thought the other area would begin to leak oil.



Jon

 

i had this problem when i did my last motor

i'm going to use the mazda factory pan sealant for the return lines and see if that helps

 

I noticed that sealant on the oil pan. The degree of oil pressure should remain constant through the oil pan and turbos, which the sealant might do the job. (?) I did not get a good look at the gasket being used. This gasket could possibly be to small, or do you think it might be due to lack of un-even torque coverage on the gasket, which might be in turn give a weak point in the gasket causing the leak?

 

Punch dimples on the bottom of the housings (contact areas) and the oil pan. This gives the silicon something to stick to.

 

there is no pressure in oil pan or return lines

 

/\ you are correct there should be none.. if the pcv system is malfunctiong you will presurize the crankcase and exacerbate oil pan sealing problems.