Cummins engine problem!
I have and exhaust manifold leak on my 02 cummins ISC 350 hp engine. When they tried to remove the bolts they broke off and then had to replace the entire head after doing a pressure test. Also the tu...
Forum Discussion
BuckBarker wrote:
I learned LONG ago to never, ever try to remove engine bolts before at least a couple days of soaking fasteners with PB Blaster and never use a cheater bar. A soft blow of a hammer on the end of the wrench will shock the bolt enough to get it to move.
^^This.
I had an exhaust manifold leak on my ISL400 about four years ago. I soaked the fasteners overnight with Kroil. The next day prior to putting the wrench on the first bolt, I smacked the head of each fastener with a brass hammer to try to "shock" the bolt threads and release whatever corrosion was present.
I put a wrench on the bolt and applied constant pressure while I hit the wrench firmly with a mallet. Each bolt broke loose and almost, I repeat almost, threaded the bolts out by hand. By this time the penetrant had creeped in enough that all the thread were wet/coated with Kroil.
I trued up the exhaust manifold, as it was warped by about .015", prepped the surface of the head and reinstalled using new gaskets and ALL new fasteners from Cummins. My local dealer had the bolts/studs in stock. I applied anti-seize on the fasteners and torqued them to factory specs.
Glad I didn't run into the issues that the OP had. Sorry to hear of this.
Mike.
