trevor19 Posted August 6, 2017 Share Posted August 6, 2017 I have a Triton EA7-470 with engine problems. Has anyone come across a snapped value steam that has caused engine failure? Only has done 500,000 kms Any input would be great. Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/50693-mack-ea7-triton-head-valve-problem/ Share on other sites More sharing options...
Ezrider Posted August 6, 2017 Share Posted August 6, 2017 i am dealing with a snapped bridge guide right now, i personally have never heard of or seen a broken valve stem in my life, i have seen bent valve stems. typically caused by a loss of valve train control (to many rpms) and the valves float then causing a interference between the piston and valve, or the other common cause would be if the stem sticks in the guide typically a result of overheating. i would imagine that if a stem actually broke the resulting damage to the piston. cyl and head even possibly the rod would be quite severe. Quote Link to comment https://www.bigmacktrucks.com/topic/50693-mack-ea7-triton-head-valve-problem/#findComment-376777 Share on other sites More sharing options...
Mack Technician Posted August 8, 2017 Share Posted August 8, 2017 Most breaks i've seen have started with a broken valve spring that releases the keepers. I experienced it ......Slap slap slap slap bang. Once had a valve spring break, release the keepers, snap the head off stem, drive head sideways splitting piston and cracking head dumping entire cooling system into engine. 302 Ford. Quote Link to comment https://www.bigmacktrucks.com/topic/50693-mack-ea7-triton-head-valve-problem/#findComment-376909 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.