01-01-15, 12:40 AM
01-01-15, 06:15 PM
Thanks guys!
I will be measuring lift on the rockers when the weather warms up a little.
I will be measuring lift on the rockers when the weather warms up a little.
01-02-15, 12:39 AM
To check for sunken valves, pull your rockers off, and run a straight edge across the valve tips. Any that sit higher, are sunk.
01-02-15, 12:49 AM
67440Dodge Wrote:To check for sunken valves, pull your rockers off, and run a straight edge across the valve tips. Any that sit higher, are sunk.
You just make things too easy...
01-02-15, 12:58 AM
When I get a chance, I'll post a picture of a poster child of sunken valves..
01-02-15, 12:14 PM
67440Dodge Wrote:To check for sunken valves, pull your rockers off, and run a straight edge across the valve tips. Any that sit higher, are sunk.Or sloppy head work and different valve with longer tip installed sometime in its life
01-02-15, 12:54 PM
or core shift
01-05-15, 08:50 PM
Pulled valve cover and rockers on drivers side. Put my machinist level on the valve stems. There is about .010 rock on the stems. Hard to see who was the bad guy. Either #3 or #5 cylinder.
visual inspection shows #5 exhaust excessive tip wear with a sharp burr on the valve stem.
These are "906" heads. Leaded gasoline. I assumed they were updated to run on unleaded? Perhaps not.
Havent checked the other head yet. 20 degrees cold in garage!
visual inspection shows #5 exhaust excessive tip wear with a sharp burr on the valve stem.
These are "906" heads. Leaded gasoline. I assumed they were updated to run on unleaded? Perhaps not.
Havent checked the other head yet. 20 degrees cold in garage!
01-05-15, 09:15 PM
Also: # 5 was the no change hole pulling one plug wire at a time...while running....
01-05-15, 11:16 PM
1) Pulling #5 wire has no effect when engine is running.
2) #5 Exhaust valve stem tip is showing excessive wear. (Can be indicative of worn guide).
3) #3 or #5 valves appear to be sitting higher than the rest.
I think you can see where I'm going.... I wouldn't bother with checking the other side.
These pictures are from a set of 906 heads I had on a 440. Compression was good, except for 1 cyl was little low. Nothing crazy, but didn't run right.
This picture is with a ruler over the valve stems for 3 and 5. It sits level on them, but is showing air on the intake for 5 and 7.
5442
Here are the chambers.. you can clearly see the sunken exhaust valves.. I pulled the valves a few weeks ago, and they were all level when off the head and on the bench
5443
2) #5 Exhaust valve stem tip is showing excessive wear. (Can be indicative of worn guide).
3) #3 or #5 valves appear to be sitting higher than the rest.
I think you can see where I'm going.... I wouldn't bother with checking the other side.
These pictures are from a set of 906 heads I had on a 440. Compression was good, except for 1 cyl was little low. Nothing crazy, but didn't run right.
This picture is with a ruler over the valve stems for 3 and 5. It sits level on them, but is showing air on the intake for 5 and 7.
5442
Here are the chambers.. you can clearly see the sunken exhaust valves.. I pulled the valves a few weeks ago, and they were all level when off the head and on the bench
5443