Corrosion in the Main Cylinder

[earthworms]

Hi.

Lost compression in the engine back in June when my friend (I wasn't there) overheated the motor until it stopped running. Got a relatively inexpensive tow back from Osoyoos after being told the head was cracked by a mechanic and parked it underground until I had some time to open it up. Well, that time is now and I've discovered an oil leak in the turbo, some melted plastic tube in the exhaust and now this rust corrosion in the cylinder. The head gasket seems a little warped but I wouldn't say damaged. I was planning on bringing the head up to Alec's Automotive to run a compression and valve test but with this mess in the cylinder I'm wondering if it's worth it.

Also, am I just paranoid or does the engine typically have a slight angle down from the front of the cam shaft towards the back? Just worried after a conversation about potential damage to the bottom end which I am in no way prepared to deal with at home.

[earthworms]

Oh, forgot to mention also that the engine seized shortly after refuelling. I've seen this in other posts and like those in the other posts, have been reassured by the driver that diesel was put in the tank.

[thedjjack]

The cylinder does not look good.

You are going to need to pull apart the bottom end....

It looks like full rebuild or used motor time.

Options:

1) new motor
2) rebuild motor
3) swap in a gas motor
4) scrap

[FalcoColumbarius]

That's rust, isn't it? Did you blow a head gasket? If you can't clean the rust away then you also have the option of new cylinder sleeves. I see you're in Vancouver, have you spoken to the chaps at CVI? They can be pretty resourceful.

Falco.

[konadog]

The cylinder does not look good.

You are going to need to pull apart the bottom end....

It looks like full rebuild or used motor time.

Options:

1) new motor
2) rebuild motor
3) swap in a gas motor
4) scrap

Forget the gas motor switch option - It's not an easy, direct switch at all but an epic deal...

[earthworms]

@ thedjjack --- Yeah, I've been avoiding the scrap solution, but I'm 95% there.

@ konadog --- I've read over that topic and agree, I also don't really have the cash flow to go that route right now.

@ falco --- Yes, that's rust, but not just rust spot which can be cleaned, we're looking at corroded pockets which go as deep as 2 mm in some locations. I'll be calling CVI once again tomorrow to update them with my situation and see if there's anything left for me to do.

Thanks everyone.

Kinda not so happy right now, but hey, I've never worked on a vehicle before and was able to take everything apart without too much trouble. It's been fun, just wish there was gold in that cylinder. Back to alchemy...

[edgar]

Right now I'm taking this motor still in the car with a friend for an overhaul. How will the engine work and give somewhere photographs of repair will put a link here to the work he does. In the Czech Republic admires his work all the offroad community.

[earthworms]

Thanks for that, edgar, the folks at CVI (local shop) do seem to think that the corrosion can be cleaned out, but now that the head's off it's not possible to do a pressure test for the bottom end to see what else may be wrong. Oh well, I'm out of town for a couple weeks... will dive back in once I'm back.

[thedjjack]

rust can be cleaned sure.... but it will have micro pitting in the wall unless by clean it is over bored with larger pistons... but if it overheated you can crack piston rings.

If I had a motor that far apart I would pull the pistons and do it properly. That said what shape is the injector system in and turbo? That is what ads costs to proper rebuild? plus the cooling system will need sorted.

If those new crate motors were still around it would be an easy solution.

[earthworms]

not sure about the injector system, but the turbo looks like it at least needs new seals as oil is all over the bottom end of it. had planned on bringing it out to ADP this week, but spring break is messing with my schedule.

[FalcoColumbarius]

... If I had a motor that far apart I would pull the pistons and do it properly. ...

X2. You're pretty much there already ~ may as well do an overhaul and fix everything. Replace the seals, gaskets, rings &c..

Falco.

[Big-Bird]

Maximum Overdrive in Richmond is advertising new 4D56 (2.5TD)crate motors on his site. It looked to be 100% complete in the pic.