AJ02Vet Posted June 10 Share Posted June 10 My 2002 RD is at it again.. it all started with a miss and a tick. Within seconds it became a hard knocking and the damage was done. Number 4 cyl has bent valves (but not pushrods?), the exhaust bridge won't lift off by hand.(bent bridge guide) and strangely the injector cap plug was just lying there... The threads have broken off the head completely! The piece was between the outer valves. Loosely, on edge, of the water manifold side. From this, I guess, I will have another boat anchor! I would appreciate any thoughts of what you fellas think caused this failure. BTW, none of the valves have un-keyed. Quote Link to comment https://www.bigmacktrucks.com/topic/74252-e7-350-injector-retainer-plug-and-threads-broken/ Share on other sites More sharing options...
Joey Mack Posted June 10 Share Posted June 10 is the outboard intake valve 'High' compared to the others? was the engine pushing coolant recently? was a valve adjustment done shortly before this happened? did the driver overspeed the engine? Quote Link to comment https://www.bigmacktrucks.com/topic/74252-e7-350-injector-retainer-plug-and-threads-broken/#findComment-553447 Share on other sites More sharing options...
AJ02Vet Posted June 11 Author Share Posted June 11 None of the above. I had the heads worked about 2 years ago. I drive the truck myself. It has a roll-off body and most of the loads are under 14k. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74252-e7-350-injector-retainer-plug-and-threads-broken/#findComment-553504 Share on other sites More sharing options...
fjh Posted June 11 Share Posted June 11 Yup the head is definitely Anker material !( theory ) the chunk got between the springs stopped the valve from going all the way down and results are what you have! hope fully the piston is ok and you can get away with just a head ! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74252-e7-350-injector-retainer-plug-and-threads-broken/#findComment-553519 Share on other sites More sharing options...
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