T
TheBreeze
Well-known member
Sled is a 2010 M8 Boondocker Turbo. I rebuilt the top end this summer due to a wrist pin circlip that came out of the PTO piston and gouged through the nicasil on the cylinder wall on its way out.
I installed new pistons, rings, wrist pins, wrist pin bearings, circlips, base gasket, o-rings, replated the PTO cylinder, and had the MAG cylinder re-cross hatched. During that process, I installed a KOSO egt gauge to supplement the A/F gauge that came installed on the sled.
The motor fired right up after the rebuild, idles normally, and revs up just fine on the stand. However, the PTO side consistently idles 70-80* hotter than the mag side on the EGT gauge. The temperature difference holds solid when I increase the RPM's on the track stand (Ive only had it up to about 5500 rpm's)
I have tried swapping the EGT probes around, and the temp difference stays consistent the PTO side. I have also sprayed a bunch of starting fluid around the PTO crank seal, reed boots, base of cylinder, etc with no noticeable increase in RPM's indicating an air leak.
I also bypassed the boondocker box and temps remained the same.
My 08 M8 would always run much closer temps from side to side, which has me worried about the integrity of this motor.
Is this something I should be concerned about at this point? Do EGT's tend to stabilize as the motor is broken in and run under load for a period of time?
If I need to tear back into this motor, now is the time.
I installed new pistons, rings, wrist pins, wrist pin bearings, circlips, base gasket, o-rings, replated the PTO cylinder, and had the MAG cylinder re-cross hatched. During that process, I installed a KOSO egt gauge to supplement the A/F gauge that came installed on the sled.
The motor fired right up after the rebuild, idles normally, and revs up just fine on the stand. However, the PTO side consistently idles 70-80* hotter than the mag side on the EGT gauge. The temperature difference holds solid when I increase the RPM's on the track stand (Ive only had it up to about 5500 rpm's)
I have tried swapping the EGT probes around, and the temp difference stays consistent the PTO side. I have also sprayed a bunch of starting fluid around the PTO crank seal, reed boots, base of cylinder, etc with no noticeable increase in RPM's indicating an air leak.
I also bypassed the boondocker box and temps remained the same.
My 08 M8 would always run much closer temps from side to side, which has me worried about the integrity of this motor.
Is this something I should be concerned about at this point? Do EGT's tend to stabilize as the motor is broken in and run under load for a period of time?
If I need to tear back into this motor, now is the time.