possible injector problem

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Aug 12, 2008 | 09:38 AM

#16

Kwikkordead

Fleet Owner

Joined: Jun 2004

Posts: 25,090

Likes: 1,112

From: Rio Rico, AZ.

Quote:

Originally Posted by whitesdford

Sounds like a trip to the shop is in order. I dont know much about the valve setups in the 7.3's, but could this be a lifter that has gone south? Are the valves adjustable on a 7.3?

No they are hydraulic roller lifters.
The rocker arms are pretty flimsy and the pushrods bend easily.
I strongly suspect something like that is going on due to the black smoke/missing.
If it were grey/blue smoke it would be more serious. Rings, melted piston, etc.
Easy enough to fix, pull the rocker pedastal assembly, replace parts. Bolt it back down.

Aug 12, 2008 | 09:55 AM

#17

whitesdford

Thread Starter

Elder User

Joined: Jul 2005

Posts: 659

Likes: 2

From: Berthoud, CO

Great, ill start the process of looking. Got a 50 50 shot of pulling the correct valve cover, haha.

Thanks a bunch for your help.

Aug 12, 2008 | 11:54 PM

#18

Kwikkordead

Fleet Owner

Joined: Jun 2004

Posts: 25,090

Likes: 1,112

From: Rio Rico, AZ.

Quote:

Originally Posted by whitesdford

Great, ill start the process of looking. Got a 50 50 shot of pulling the correct valve cover, haha.

Thanks a bunch for your help.

FWIW, I just R&R my valve covers this afternoon, retorqued the pedastals and injectors again in prep for a vacation trip and got it done in less than two hours.
It looks like an intimidating job until you do it a couple of times.
.
All the rocker pedastal bolts but one were still tight.
EVERY injector took about 1/6 turn to get to 120 inch pounds.
For some reason they really like to loosen up.
They weren't as bad as the last time that I checked them, but more time had gone by as well.
I think this is the last time I need to go back in for a long time.