MOPAR things I learned the hard way..
When you replace a valve guide for an exhaust valve, make sure you ream it out properly and don't just shove the valve down in their during assembly thinking it will "wear in" with time. If you don't, the first or second time you drive the vehicle you will find:
1) a cloud of white smoke (steam) billow from the rear as the engine dies
2) your crankcase full of coolant
3) a spark plug electrode crushed
4) the head of an exhaust valve broken off
5) combustion chamber beat up
6) cylinder cracked
7) connecting rod bent
8) hole in forged piston
That's when I replaced the 280 degree duration .480 lift camshaft with the 312 degree duration .580 lift camshaft and went to town.
When you replace a valve guide for an exhaust valve, make sure you ream it out properly and don't just shove the valve down in their during assembly thinking it will "wear in" with time. If you don't, the first or second time you drive the vehicle you will find:
1) a cloud of white smoke (steam) billow from the rear as the engine dies
2) your crankcase full of coolant
3) a spark plug electrode crushed
4) the head of an exhaust valve broken off
5) combustion chamber beat up
6) cylinder cracked
7) connecting rod bent
8) hole in forged piston
That's when I replaced the 280 degree duration .480 lift camshaft with the 312 degree duration .580 lift camshaft and went to town.
