Originally Posted by HeapBigEngin
Old Trucker.....I have read before about cracked manifolds on ISC engines. Do you recall any type of comments made or info shared regarding typical mileage or age levels where the problem seems more likely to develop? Thanks for additional info you can pass along.....
Hi Big Engine,
At the gear head session noted above and from other IRV2 comments on the subject, it seems that many are cracked in the 30,000 mile plus area. When I purchased my 99 model with 52,000 miles I did not look at the engine from under the bed. Point being, I am not sure if it was cracked at the time of purchase or not. But I did see the crack at 55,0000 miles.
It sems that the cost of parts and labor that I have seen costed agree with my wuote of $1300. This may vary with additional labor of broken stud bolts.
If you are having the problem, it is also a good time to do a thorough job of lubricating the pack brake. I am advised by the good folks at Pac Brake DO NOT DISSSASEMBLE, CLEAN AND ATTEMPT TO REASSEMBLE. I am told that the tolerances are close and they usualy stick and cause problems. There is also a new improved version of the brake available from PacBrake.
If I can be of furthur assistance, please advise. Old trucker