rvbuilder1
Active Member
I have an RV4 with a rebuilt Lyc 0290D with 101 hrs since rebuild.
During a short hop the other day I noticed some differences in oil pressure readings from the last 100 hrs
On starting it usually goes to close to 100psi with cold oil even in the summer then drops to 85-90 when hot and pretty much stays there. On the ground at low throttle it is around 50.
On this flight upon starting it only went to 90psi. In the air it stayed at 85-90 at 2400 rpm. On the ground it was reading 45-50psi.
I have been going to chnge springs or pull washers to lower it to 85-90psi on start which is the spec for the Lyc 0290D and was surprised at the 10psi drop at starting without any changes to the oil pressure mechanism
The oil pressure is taken off the back of the engine and I have read that that is always lower pressure than if you take it off the front of the engine
SHOULD I BE WORRIED?
During a short hop the other day I noticed some differences in oil pressure readings from the last 100 hrs
On starting it usually goes to close to 100psi with cold oil even in the summer then drops to 85-90 when hot and pretty much stays there. On the ground at low throttle it is around 50.
On this flight upon starting it only went to 90psi. In the air it stayed at 85-90 at 2400 rpm. On the ground it was reading 45-50psi.
I have been going to chnge springs or pull washers to lower it to 85-90psi on start which is the spec for the Lyc 0290D and was surprised at the 10psi drop at starting without any changes to the oil pressure mechanism
The oil pressure is taken off the back of the engine and I have read that that is always lower pressure than if you take it off the front of the engine
SHOULD I BE WORRIED?