Stephan D
Well-Known Member
In order to chase down the cause of my shakey idle, I have now had a leakdown test done with the following result:
Cyl PSI Leak % Cyl PSI Leak %
1 150 3 2 145 9
3 150 7 4 140 6
5 155 3 6 142 8
7 140 8 8 150 10
Any input on these figures, good or bad?
According to the workshop it was not too bad for a 40+ year old non restored engine, but not up to todays standards in any way.
Not sure if I will have the engine torn down coming winter, but it will cost a lot as I can't do it myself and labor cost is very high in this corner of the globe.
They also found a leaking throttle shaft, it's easy to fix so I have ordered a new bushing kit.
Ignition is stable, 13* initial at idle.
The idle shake for those that haven't seen it:
Cyl PSI Leak % Cyl PSI Leak %
1 150 3 2 145 9
3 150 7 4 140 6
5 155 3 6 142 8
7 140 8 8 150 10
Any input on these figures, good or bad?
According to the workshop it was not too bad for a 40+ year old non restored engine, but not up to todays standards in any way.
Not sure if I will have the engine torn down coming winter, but it will cost a lot as I can't do it myself and labor cost is very high in this corner of the globe.
They also found a leaking throttle shaft, it's easy to fix so I have ordered a new bushing kit.
Ignition is stable, 13* initial at idle.
The idle shake for those that haven't seen it:
