Help please. I have looked in search and have not found the numbers. My Chilton manual say to torque lower intake in sequence in two steps. Step 1, 8 foot/lbs. Step 2, 11 foot/lbs. I did this and drove approximately 1000 miles and water is leaking from the water passage in the lower intake into #1 cyl. Are these torque values right?
tbirdbrain thnks for the reply. That is the procedure I followed. However 11 lb/feet of torque is almost nothing. They call for more to secure the upper intake to the lower intake than to secure the lower intake to the heads. I was wondering if this is the same torque specs that Ford recommends. I appreciate the help I am receiving on this problem.
Ive had mine at 11ft/lbs for just less than a year now and have had no problems. I always go over the final torque sequence 3 times to make sure they're all tight. You'd be surprised, I've always found loose ones when tripple checking the sequence. Did you clean the head and intake surface completely? Any gasket material left over will cause a leak, guaranteed.
1988 Notch Mustang: - 438W, direct port n2o, t56 2003 SVT Focus: - SCT X3 tuner
Thomas, thanks for the reply. I did the torque sequence twice. The heads were milled 12 thousands and looked brand new. I cleaned the lower intake surfaces with a commercial aluminun cleaner and finished the process with acetone. I feel certain the surfaces were prepared properly. When I pulled the lower intake, I could see where water was going into Number 1 cylinder. I was just wanting to be sure the specs in the Chiltons was not a misprint.
The reason I ask that, is because if you take too much material off of the block and/or the head, you change the way the intake sits on the heads and that'll cause a leak. It's actually a pretty common occurrence.
I was told by my shop that 12 thous is too much too have shaved for this heads.
shaving too much will change compression. remember you are making the heads slightly shorter so this will change the distance between each head (going across the span where the intake sits). This will change the way the intake sits on the head and may be the cause of your problem.
If you are sure that is where it is leaking I would pull the intake off and try to pinpoint the problem to a specific area. Maybe you tore the intake gasket or got some debris between gasket and intake. Maybe you missed a crack.
Good luck though.
Last edited by CincyT-Bird; 10-21-2005 at 10:17 PM.