- Oct 9, 2003
- 968
- 1
- 17
I noticed that my rear lower intake-to-block seal had started leaking, so I removed my lower intake to fix it. I pulled the lower and found a few issues.
1) big split over #2 cylinder. It appears that the top half of the entire left half of the pass side gasket has shifted (racked) a bit to the left.
2) back seal destroyed. It's essentially cut in half.
3) small split over #7 cylinder.
4) oil leaking into middle cylinders at the bottom of the intake runner.
5) oil seeped up into the middle bolt holes (#9-12). You can see in the pics that there is so much that it was running down the gasket after I took off the lower.
Does this appear like I've overtightened the intake, particularally in the middle?
I used gaskasinch on the entire surface of the gasket-to-head side of the gasket and the head. I then used a light coating of ultra black RTV encircling the water ports on the gasket on the intake side of the gasket and the intake. And use the blue rubber end seals that come with the MS93334 gasket set with a tiny bit of RTV at the ends where they meet the 1250's. Never had any probs until now.
When tighening, I orgininally tightened the anti-seize covered threads with a beam torque wrench in the correct pattern to about 15 lb-ft. I tighened them all to 5 to start with and had to go round about 5 times to get them all to 5, then moved up to 10, and same thing, about 5 times around to get them all to 10. Same thing for 15.
I have since re-torqued these bolts in the same meticulous manner about 6-7 different times (every time the upper intake is off, mostly when adjusting valves). Each time, the bolts had apparently dropped to about 10 lb-ft. So I tightened them up. I wonder now if I should have just done this re-torque once (or twice) and let it go? I wonder if I continually squish the gasket each time? I wonder if I squished the lower rubber gasket so much that the inside half got pushed into the lifter valley and the outer half got squished out?
Thanks,
Rick
1) big split over #2 cylinder. It appears that the top half of the entire left half of the pass side gasket has shifted (racked) a bit to the left.
2) back seal destroyed. It's essentially cut in half.
3) small split over #7 cylinder.
4) oil leaking into middle cylinders at the bottom of the intake runner.
5) oil seeped up into the middle bolt holes (#9-12). You can see in the pics that there is so much that it was running down the gasket after I took off the lower.
Does this appear like I've overtightened the intake, particularally in the middle?
I used gaskasinch on the entire surface of the gasket-to-head side of the gasket and the head. I then used a light coating of ultra black RTV encircling the water ports on the gasket on the intake side of the gasket and the intake. And use the blue rubber end seals that come with the MS93334 gasket set with a tiny bit of RTV at the ends where they meet the 1250's. Never had any probs until now.
When tighening, I orgininally tightened the anti-seize covered threads with a beam torque wrench in the correct pattern to about 15 lb-ft. I tighened them all to 5 to start with and had to go round about 5 times to get them all to 5, then moved up to 10, and same thing, about 5 times around to get them all to 10. Same thing for 15.
I have since re-torqued these bolts in the same meticulous manner about 6-7 different times (every time the upper intake is off, mostly when adjusting valves). Each time, the bolts had apparently dropped to about 10 lb-ft. So I tightened them up. I wonder now if I should have just done this re-torque once (or twice) and let it go? I wonder if I continually squish the gasket each time? I wonder if I squished the lower rubber gasket so much that the inside half got pushed into the lifter valley and the outer half got squished out?
Thanks,
Rick