Ran like a Sherman tank. I'm told that the injector is good, has to be something in the cylinder itself. Gonna be a big bill I think.

 

A bubble test is quick and easy to rule out injector

 

Turned out to be a lost bolt from prior work done. I've only owned the truck a few months and have not had any engine work done myself. However, the engine has a PowerMax Turbo, studs, gaskets, oil cooler, injectors etc. Looks like a negligent mechanic dropped this bolt and did not bother to check the intake manifold.

After a unknown period of time, the bolt found its way into the No.8 cylinder intake port and jammed open a intake valve. The valve bent and the valve seat was damaged. The top of the piston was lightly scored.

Needless to say, it was a crappy and expensive day. I would send photo's but can't remember how to do it.

 

Sorry to hear that, it's a shame that these engines have to be configured (for the lack of a better word) so that it's hard to find people that actually know what they are doing to repair them. It's the one thing that scares me about owning a 6.0 and living in north central Maine I don't have the facilities or the time to do much of the wrenching on my own so if anything goes wrong with mine I most likely will be basically screwed........not a great feeling if you know what I mean. I hope your problems don't turn out to be massive and when corrected things go well for you.

 

Not as rare as you think. Same thing happened on my 72" 3/4 ton 390. The shop used a spinning basket type deal to clean the heads after a valve job. I'm not sure if a bolt worked its way in then or if I was sabotaged by a disgruntled boy friend.
lessons learned.
1. Check ports before buttoning up.
2. When your stealing someones Girl friend don't do a Valve Job at her house.

 

Highly unlikely a bolt was in it from cleaning. Better chance your GF's ex had something to do with it. Even better chance that bolt found its way there during the repair.

Free floating bolts play hell on valves, pistons and cylinder walls

 

Back in the late 70 early 80

NOT me but I know of a guy that was rebuilding some thing on the top on the
engine and dropped a nut and could not find it. He found tit at first start
when the flame blew back up out of the carb. They stopped at that point
and went looking. It was between a valve and the seat. This guy was not the sharpest
tool in the shed. He later went on to fix a leaking head gasket with JB weld all
over the gasket and then stuck the head on.

Some times I think what havoc is he causing now.

Back to the topic.

How did the walls do ? Head damage only I hope.

Sean

 

Bent valve and some scoring on the valve seat. Minor scuff to top of piston.

 

Is the piston cracked? No damage on the walls?

Maybe you can get away with just a valve, seat and head gasket.

 

The jobs already done.