96 Cobra 4.6 4v. Wanted a quick check.. pulled valve covers off and removed my rocker arms / cams. Filled each cylinder with 70psi to check leak % and the results are as follows
I am assuming these are rings as I could only really hear the air leak through the crank case. I had been thinking, and hoping, valve stem seals but I realized I doubt air would be leaking past the valves since they're all 4 closed per cylinder with having no rocker arms attached. Just wanted some confirmation and thoughts from others before I start to pull the heads and do a ring job.
| Each cylinder filled with 70 psi | ||
| CYL | PSI | LEAK % |
1 | 55 | 21 |
2 | 59 | 16 |
3 | 52 | 26 |
4 | 56 | 20 |
5 | 60 | 14 |
6 | 60 | 14 |
7 | 54 | 23 |
8 | 56 | 20 |
I am assuming these are rings as I could only really hear the air leak through the crank case. I had been thinking, and hoping, valve stem seals but I realized I doubt air would be leaking past the valves since they're all 4 closed per cylinder with having no rocker arms attached. Just wanted some confirmation and thoughts from others before I start to pull the heads and do a ring job.