turbosl2
Well-Known Member
Looking for everyone’s technical input.
08 challenger 230 with twin 215s
One engine has been using coolant and oil. I taped an overflow bottle to the coolant reservoir and did a WOT run and the bottle was full - indicating a head gasket as I suspected.
Visual inspection I see oil running out around the head gasket, valve cover gasket, water pump hole, oil cooler o rings…etc. pretty much if it has a rubber oring or gasket it leaks. So I degreased the engine so it was spotless if oil. Ran it again and oil appeared around the HG and the valve cover gasket within a day.
Today I brought the boat home, did a compression and leak down test. Unfortunately these were done stone cold after the boat has not run for a week. I also did the same on the good motor to compare results. I am confused how it can run!
Engines cold:
Bad motor:
35psi, 55psi, 55psi
All plugs out.
Leakdown - 50%, 60%,60%
I can hear air through the dipstick hole since I took it out.
Good motor:
90psi, 90psi, 90psi
All plugs out
Leakdown - 10%, 10%, 14%
I am in the process of pulling the head on the bad motor but what I was trying to see is if the rings are shot. I really don’t want to have to rering it unless I am sure.
Since I know the HG is shot how can I really tell if the motor needs new rings or not when the HG seems to be leaking.
The motor NEVER smoked blue or anything. It always started right up and ran great. Boat always did ~ 50mph and the only reason I am pulling the head is due to the coolant loss and I am not sure about the disappearing oil. I figured it’s a different issue , and not the rings. Only because it goes through about a quart every weekend 2-4hrs of runtime. If it were burning it I figure I would see it blue on the trailer or on plane. Here is a picture of the plugs.
One plug just looks wet because the spark plug tube had oil in it that ran down the threads amd I could not tip it up straight before the oil got to the electrode.
Thoughts?
08 challenger 230 with twin 215s
One engine has been using coolant and oil. I taped an overflow bottle to the coolant reservoir and did a WOT run and the bottle was full - indicating a head gasket as I suspected.
Visual inspection I see oil running out around the head gasket, valve cover gasket, water pump hole, oil cooler o rings…etc. pretty much if it has a rubber oring or gasket it leaks. So I degreased the engine so it was spotless if oil. Ran it again and oil appeared around the HG and the valve cover gasket within a day.
Today I brought the boat home, did a compression and leak down test. Unfortunately these were done stone cold after the boat has not run for a week. I also did the same on the good motor to compare results. I am confused how it can run!
Engines cold:
Bad motor:
35psi, 55psi, 55psi
All plugs out.
Leakdown - 50%, 60%,60%
I can hear air through the dipstick hole since I took it out.
Good motor:
90psi, 90psi, 90psi
All plugs out
Leakdown - 10%, 10%, 14%
I am in the process of pulling the head on the bad motor but what I was trying to see is if the rings are shot. I really don’t want to have to rering it unless I am sure.
Since I know the HG is shot how can I really tell if the motor needs new rings or not when the HG seems to be leaking.
The motor NEVER smoked blue or anything. It always started right up and ran great. Boat always did ~ 50mph and the only reason I am pulling the head is due to the coolant loss and I am not sure about the disappearing oil. I figured it’s a different issue , and not the rings. Only because it goes through about a quart every weekend 2-4hrs of runtime. If it were burning it I figure I would see it blue on the trailer or on plane. Here is a picture of the plugs.
One plug just looks wet because the spark plug tube had oil in it that ran down the threads amd I could not tip it up straight before the oil got to the electrode.
Thoughts?
