Rick69
Active Member
This is probably an amateur question.
I have a 1969 440. I have only had this car for 6 years. I don't know who or when the motor was rebuilt. There is a light tapping especially when cold. There is also a little oil seepage past the factory valve covers. I removed the valve covers to take a look and replace the gaskets. I discovered there are individual adjustable rockers. I believe the factory set up used a rocker shaft with self adjusting lifters. I don't feel any looseness when I rotate the cam to base lobes so I'm thinking this is a hydraulic cam and lifters.
How would I tell for certain? Push on the rocker and see if there is any collapse?
If they are hydraulic, what is the best way to adjust? Would I check the adjustment with the engine cold or should I run it for a little bit first?
What would be the correct amount of adjustment? Take the play out of the pushrod and then go another 3/4 turn?
Appreciate any advice.
Ricky
I have a 1969 440. I have only had this car for 6 years. I don't know who or when the motor was rebuilt. There is a light tapping especially when cold. There is also a little oil seepage past the factory valve covers. I removed the valve covers to take a look and replace the gaskets. I discovered there are individual adjustable rockers. I believe the factory set up used a rocker shaft with self adjusting lifters. I don't feel any looseness when I rotate the cam to base lobes so I'm thinking this is a hydraulic cam and lifters.
How would I tell for certain? Push on the rocker and see if there is any collapse?
If they are hydraulic, what is the best way to adjust? Would I check the adjustment with the engine cold or should I run it for a little bit first?
What would be the correct amount of adjustment? Take the play out of the pushrod and then go another 3/4 turn?
Appreciate any advice.
Ricky