[nick1997]

Hey everybody! Thought this was a really cool site with a lot of knowledgeable people where I could get an answer to my problem.

So we have a 1993 F350 5 spd 7.3 idi w/ Factory Turbo.

This truck was used as a farm truck until some college kid wrecked it out on the highway. Blew some tires, dented up the body, etc. The biggest thing was that somehow the radiator fan blade was bent and just split the radiator wide open (not sure if it's directly related to my problem). Anyway, when I start it up it has a really loud knock and oil is coming out of the engine on the passenger side. I took both valve covers off and all the rockers were in good shape. The valve cover gaskets were hard and I'm hoping that the oil was leaking out there. This knock is really loud- the speed matches the engine RPM's. It seems to be coming from the rear end of the passenger side. I'm assumed it's a rod or something like that but I'm definitely not an expert when it comes to Diesel engines. I'm going to crack the injector lines but I wouldn't think a knock this loud and deep would be caused by a faulty injector or two. The oil is a little low but not extremely.

Do you know what this could be??
What's your recommended course of action?

All advice is appreciated!

-Nick

 

[chuckster57]

Welcome to the Diesel Stop.

If the noise sounds down deep, it's probably a rod or main bearing. Drain the oil and watch for any metal flake. Then take the oil filter off and split it open looking for metal flakes.
I wouldn't run it very long like it is, might tear up a crankshaft beyond repair or worse yet put a rod through the block and have a useless engine.

 

[oldrebuiltdodge]

DITTO^^^^

 

[nick1997]

http://youtu.be/kclELrJgsA8

Thanks for the advice. Here's a video shot 2 weeks ago. Engine has had maybe 25 minutes on it since then

 

[chuckster57]

There is definitely something wrong. Without standing there with a stethoscope or long screwdriver, I can't say with any precision where it's originating from. My guess is a rod bearing and if I'm right it can tear up the crank journal and even a main bearing cap in short order.

I would be pulling the engine, and yanking the oil pan off ASAP.

 

[oldrebuiltdodge]

I recently had one break a piston skirt, sounded just like that. I would tear it down, and rebuild it before I ran it anymore, limit the damage as much as possible. That knock definitely isn't good, and if run much more it will get very ugly.