Axel
New Member
Machine: 2012 Super Tenere, about 35 k miles, I'm the second owner.
While changing air filter, I decided to have a look at the spark plugs, and with the plugs being removed, 'decided to check compression. Expecting to get readings up to 100 or more psi, I was disappointed in getting 64 on left and 74 on right. Isn't that too low? Shouldn't I be expecting higher pressure?
IF those triple-checked readings are abnormally low, what's the cause: rings? valves seats? (I haven't done the oil-in-the-cylinder test yet. BUT this is where I need thoughts...would valve gap (we used to call them tappets) affect compression? I'm thinking that worn lobes, arms, or shims on an overhead cam would allow valves to close tighter...or am I missing something?
It would be great to get thoughts from more Tenere-experienced folks than I am.
Thanks
While changing air filter, I decided to have a look at the spark plugs, and with the plugs being removed, 'decided to check compression. Expecting to get readings up to 100 or more psi, I was disappointed in getting 64 on left and 74 on right. Isn't that too low? Shouldn't I be expecting higher pressure?
IF those triple-checked readings are abnormally low, what's the cause: rings? valves seats? (I haven't done the oil-in-the-cylinder test yet. BUT this is where I need thoughts...would valve gap (we used to call them tappets) affect compression? I'm thinking that worn lobes, arms, or shims on an overhead cam would allow valves to close tighter...or am I missing something?
It would be great to get thoughts from more Tenere-experienced folks than I am.
Thanks