MB replaced the cylinder head due to leaky valve
#1
Super Member
Thread Starter
MB replaced the cylinder head due to leaky valve
I'm not sure how widespread this info is, but MB extended the warranty for exhaust value issues on the M157 and M278 motors.
If you have a compression test failure / misfire caused by worn valve seats, at less than 10y and less than 120k miles, you could get a new cylinder head.
I just got my GL550 back from having this done, much better now.
If you have a compression test failure / misfire caused by worn valve seats, at less than 10y and less than 120k miles, you could get a new cylinder head.
I just got my GL550 back from having this done, much better now.
The following 3 users liked this post by mekantor:
#2
Member
I'm not sure how widespread this info is, but MB extended the warranty for exhaust value issues on the M157 and M278 motors.
If you have a compression test failure / misfire caused by worn valve seats, at less than 10y and less than 120k miles, you could get a new cylinder head.
I just got my GL550 back from having this done, much better now.
If you have a compression test failure / misfire caused by worn valve seats, at less than 10y and less than 120k miles, you could get a new cylinder head.
I just got my GL550 back from having this done, much better now.
#3
Super Member
Thread Starter
There might be a code stored in the ECU which Xentry can read. IT would say something like "the injector adjustment is beyond acceptable parameters" but it wouldn't necessarily misfire enough to store an OBDII code.