Hi guys,
After I had a sticking valve in the No.1 cylinder, I inspected all 4 on my RV-9, equipped with a Lycoming O-320-D2J. They were all found in a rather sorry state and I decided to replace all four with factory new cylinders.
The plane is equipped with a James Holy cowl and today I flew for the first time. Cylinder 3 is the hottest and won't cool down under 400F. In climb it went as high as 440F. Before the cylinder change, No.1 was the hottest but would cool down to be within 25F of the other cylinder head temperatures in cruise, all around 375F depending on OAT.
Oil cooler is behind No.3 cylinder and takes a chunk of the cooling air but this was never a big issue before.
Attached is picture in cruise of CHT's and EGT's.
What would be the best approach to solve this issue ?
Your advice would be very much appreciated.
Best regards.
After I had a sticking valve in the No.1 cylinder, I inspected all 4 on my RV-9, equipped with a Lycoming O-320-D2J. They were all found in a rather sorry state and I decided to replace all four with factory new cylinders.
The plane is equipped with a James Holy cowl and today I flew for the first time. Cylinder 3 is the hottest and won't cool down under 400F. In climb it went as high as 440F. Before the cylinder change, No.1 was the hottest but would cool down to be within 25F of the other cylinder head temperatures in cruise, all around 375F depending on OAT.
Oil cooler is behind No.3 cylinder and takes a chunk of the cooling air but this was never a big issue before.
Attached is picture in cruise of CHT's and EGT's.
What would be the best approach to solve this issue ?
Your advice would be very much appreciated.
Best regards.