I am way better at repairing than diagnosing!
about 8 months after doing a new head, piston, rings, cylinder on my 96 400, its started running terrible all of a sudden. I had been fighting carb issues too, so at first I thought it was that. Long story short put a compression tester on there and I'm only getting 60 psi! Not even sure how thats enough to run at all but it is. It just falls on it's face on anything more than 10% throttle. I pulled the oil fill cap while running just for giggles and it sprayed oil everywhere and dang near sounded like an exhaust leak coming out of the crankcase lol. ( i know thats not advised but I wanted to see)
Kind of at a loss as to what could have failed as it ran great for 203 miles after the work I did.
Leaning towards the head gasket as the new one I put in had a rivet that was getting pinched between head and cylinder, so I cut the rivet out and manually aligned the gasket with sheer luck and the alignment pins(when the rivet was removed the gasket flayed out a bit on one side)
Everything had been fine until now. A few other issues I was having may help point a finger
1. my oil cooler fan is dead but never once got an oil temp light(other than when key is on and engine is off)
2. Carb is running an odd mixture of rich and lean and I'm not very good at carb tuning. No power/falling on face at high rpms, but smells gassy at other times when on moderate throttle. plug wasnt fouled or white just the usual tan ish color. Maybe the temps got too hot and smoked my gasket??
Thank you for any help. Dan
about 8 months after doing a new head, piston, rings, cylinder on my 96 400, its started running terrible all of a sudden. I had been fighting carb issues too, so at first I thought it was that. Long story short put a compression tester on there and I'm only getting 60 psi! Not even sure how thats enough to run at all but it is. It just falls on it's face on anything more than 10% throttle. I pulled the oil fill cap while running just for giggles and it sprayed oil everywhere and dang near sounded like an exhaust leak coming out of the crankcase lol. ( i know thats not advised but I wanted to see)
Kind of at a loss as to what could have failed as it ran great for 203 miles after the work I did.
Leaning towards the head gasket as the new one I put in had a rivet that was getting pinched between head and cylinder, so I cut the rivet out and manually aligned the gasket with sheer luck and the alignment pins(when the rivet was removed the gasket flayed out a bit on one side)
Everything had been fine until now. A few other issues I was having may help point a finger
1. my oil cooler fan is dead but never once got an oil temp light(other than when key is on and engine is off)
2. Carb is running an odd mixture of rich and lean and I'm not very good at carb tuning. No power/falling on face at high rpms, but smells gassy at other times when on moderate throttle. plug wasnt fouled or white just the usual tan ish color. Maybe the temps got too hot and smoked my gasket??
Thank you for any help. Dan
