compare head gasket $ and you'll buy a Deere any day as Cat could get $ nuts on some parts .Digitup.i just purchest a d3b & contain the very same problem with theleft pedal sticking i will test oil to-morrow . I've a question. is it ordinary for just a loud deisel knock?many thanks for any info on this cat.don.Not sure which Caterpillar tractor eng… Read More