Thanks for this site. I am new here and hope to learn a lot.
I have two questions about an 1981 international truck with a cummins big cam 2 motor--both are start up questions.
1. When I first start the truck it has a hard time turning over and occasionally wont crank unless i release the starter and hit it again. Once it cranks it immediatly starts. Batteries are all good. It has a fair amount of white smoke on start up. I am wondering if this is a sign of a 'water hydraulic' resistance in a cylinder keeping the engine from turning over due to some sort of seal failure, cylinder crack, etc. Once running and it warms up for a few minutes it runs great with lots of power and a steady response at all RPMs. How would I investigate this?
2. Second. (and it may be related) When you first start this truck it runs rough and has lots of white smoke. At a certain time after it is initally running (about 3minutes) a switch or something 'clicks' and the engine immediately runs evenly, smoothly and the white smoke dissapears. This happens as the air pressure reaches about 60 PSI. The guy I bought it from told me this was 'air advance timing' Neither I (the inexperienced one) no my good friend and experienced heavy machinist and truck builder had heard of this. Any thoughts on this phenomena and could it be related to my first question?
Thanks in advance!
I have two questions about an 1981 international truck with a cummins big cam 2 motor--both are start up questions.
1. When I first start the truck it has a hard time turning over and occasionally wont crank unless i release the starter and hit it again. Once it cranks it immediatly starts. Batteries are all good. It has a fair amount of white smoke on start up. I am wondering if this is a sign of a 'water hydraulic' resistance in a cylinder keeping the engine from turning over due to some sort of seal failure, cylinder crack, etc. Once running and it warms up for a few minutes it runs great with lots of power and a steady response at all RPMs. How would I investigate this?
2. Second. (and it may be related) When you first start this truck it runs rough and has lots of white smoke. At a certain time after it is initally running (about 3minutes) a switch or something 'clicks' and the engine immediately runs evenly, smoothly and the white smoke dissapears. This happens as the air pressure reaches about 60 PSI. The guy I bought it from told me this was 'air advance timing' Neither I (the inexperienced one) no my good friend and experienced heavy machinist and truck builder had heard of this. Any thoughts on this phenomena and could it be related to my first question?
Thanks in advance!
