Leaky CT26

[Caveman84]

I've got a leaking CT26, and I'm struggling to find the source without pulling it out. It's caked in oil. Anyone any ideas from the photos I've taken?

Also, on one of the photos it looks like a piece has broken off near the fan. Wondering if it's best to take it out and properly inspect it

 

[The Machinist]

It looks like whatever is leaking is above or in front of the the turbo, its too evenly covered from top to bottom to be the turbo itself leaking.

For the part that looks "broken" on the compressor wheel, that is just a balancing cut that was made when the turbo was manufactured. Nothing to be concerned with. The oil on the inside of the turbo inlet does indicate that your turbo is ingesting a bit of oil from the PCV, so it wouldn't be a bad idea to add a catch can.

 

[Caveman84]

It looks like whatever is leaking is above or in front of the the turbo, its too evenly covered from top to bottom to be the turbo itself leaking.

For the part that looks "broken" on the compressor wheel, that is just a balancing cut that was made when the turbo was manufactured. Nothing to be concerned with. The oil on the inside of the turbo inlet does indicate that your turbo is ingesting a bit of oil from the PCV, so it wouldn't be a bad idea to add a catch can.

Thanks for your reply. I inspected the cross over pipe which looks like it has a little surface rust, maybe this combined with some oil coming from the breather is creating this brown substance. Should I be worried about the amount of oil coming from the engine through the breather? Or is this normal for the 12ht?

I couldn't see a PCV on mine. Should it definitely have one? I assume it would be somewhere in the breather hose setup?

I'll check out the catch can as you say

 

[The Machinist]

That breather hose is what I was referring to as PCV, yours is pretty normal looking. Catch can would just go in between the valve cover and the connection to the crossover tube to help reduce the volume of oil mist that makes it to the turbo.

The brown stuff is definitely something you will want to track down, that is not normal. Is it possible that is dust being sucked in and bypassing the air filter? Follow the intake tubes towards the air filter until you find the source of the brown residue, there may be a leaking hose or plug missing somewhere.

 

[Caveman84]

That breather hose is what I was referring to as PCV, yours is pretty normal looking. Catch can would just go in between the valve cover and the connection to the crossover tube to help reduce the volume of oil mist that makes it to the turbo.

The brown stuff is definitely something you will want to track down, that is not normal. Is it possible that is dust being sucked in and bypassing the air filter? Follow the intake tubes towards the air filter until you find the source of the brown residue, there may be a leaking hose or plug missing somewhere.

Ah, that breather hose is called a PCV

I think I've found a leak in a the rubber hose between the air filter and cross over pipe. It seems to be where the brown dusty stuff begins, and then becomes more sludgy as it mixes with the oil vapour.

I'm wondering if the rubber hose between the cross over pipe and the turbo wasn't tightened down well enough. The oil has built up round the intake to the turbo and on and around that hose. Ill clean it all, reinstall and make sure all the hose are good and tight. Thanks for your help!

 

[Eurasiaoverland]

PCV = positive crankcase ventilation. It's a closed system to feed positive pressure from the crankcase to the intake system. It was originally to stop engines ingesting water during river crossings, but is now done for environmental reasons.

A PCV valve is not present on this era of diesels.

All engines will produce some blow-by vapour, but if it streams out white oily fumes when you rev the engine with the PCV hose disconnected at the valve cover, it's a sign your engine is very worn and could do with a rebuild.

Oil kills rubber slowly, so your intake hoses will slowly deteriorate and stop sealing, hence the creeping oil around the joints.

Catch cans divide people and can cause more problems (have a read on the topic) if they are not well designed and installed. If you have bad blow-by, I would run a long hose into a chassis rail.

The brown stuff is not good. If you lived in the Australian outback it might be red dust getting past the filter, but that's not going to happen in Denmark (or was the vehicle originally Australian?). Which makes me wonder if that is rusty water or even coolant getting in.

 

[Caveman84]

PCV = positive crankcase ventilation. It's a closed system to feed positive pressure from the crankcase to the intake system. It was originally to stop engines ingesting water during river crossings, but is now done for environmental reasons.

A PCV valve is not present on this era of diesels.

All engines will produce some blow-by vapour, but if it streams out white oily fumes when you rev the engine with the PCV hose disconnected at the valve cover, it's a sign your engine is very worn and could do with a rebuild.

Oil kills rubber slowly, so your intake hoses will slowly deteriorate and stop sealing, hence the creeping oil around the joints.

Catch cans divide people and can cause more problems (have a read on the topic) if they are not well designed and installed. If you have bad blow-by, I would run a long hose into a chassis rail.

The brown stuff is not good. If you lived in the Australian outback it might be red dust getting past the filter, but that's not going to happen in Denmark (or was the vehicle originally Australian?). Which makes me wonder if that is rusty water or even coolant getting in.

Thanks for your help here. I tried this test and all looked ok. I fired it up and ran it to 2500 rpm. I only ran it for a minute or so, so didn't really have a chance to warm up properly, but no oil or white smoke out of the breather. So I guess that's a good sign? Or is it worth running it longer?

I uploaded a video here:


I think I might have found the source of the brown stuff. It's a Japanese import and I've found a little red can (Celcat) that's hidden under the air filter that feeds into the hose between the filter and cross over pipe. It looks like a brown substance coming from there. Needless to say I'll be removing that and replacing the rubber hoses.

 

[relaxedcruiser]

Under the air filter should only be a trap for larger particles like insects or seeds sucked into the air filter housing. So what is that Celcat ?
Could that can under the airfilter be full with water? How does you air filter look like ? Does the engine oil itself look creamy?
Oil downstream from the PCV inlet (through compressor part of turbo and into inlet manifold) is quite normal for a turbo diesel. Nothing to worry about. But it should certainly not contain the white ish stuff. That could be water. As said above - the oil mist is often leaking from hose connections.
Before taking anything apart, first thing I would recommend is to do is tighten that hose clamp in front of the turbo( you might need a smaller one....my one was to large and at the end of its range. I had to fit a smaller one) , soak the cold engine in engine cleaner and get a water blaster or better steam cleaner to clean that muck away. Be careful with the blaster - hold that nozzle not closer than about 30 cm to the various engine parts, especially not on seals or joints. Than find the first evidence of oil mist on the outside after minutes, hours or days of using the vehicle.
You might already have sealed the source with the tightening of the hose clamp directly in front of the turbo. But anyway better to have a clean engine !

 

[relaxedcruiser]

By the way, sounds good your motor - no evidence of too much oil mist coming out ...and you have that firewall insulation I like to have !

 

[Caveman84]

Under the air filter should only be a trap for larger particles like insects or seeds sucked into the air filter housing. So what is that Celcat ?
Could that can under the airfilter be full with water? How does you air filter look like ? Does the engine oil itself look creamy?
Oil downstream from the PCV inlet (through compressor part of turbo and into inlet manifold) is quite normal for a turbo diesel. Nothing to worry about. But it should certainly not contain the white ish stuff. That could be water. As said above - the oil mist is often leaking from hose connections.
Before taking anything apart, first thing I would recommend is to do is tighten that hose clamp in front of the turbo( you might need a smaller one....my one was to large and at the end of its range. I had to fit a smaller one) , soak the cold engine in engine cleaner and get a water blaster or better steam cleaner to clean that muck away. Be careful with the blaster - hold that nozzle not closer than about 30 cm to the various engine parts, especially not on seals or joints. Than find the first evidence of oil mist on the outside after minutes, hours or days of using the vehicle.
You might already have sealed the source with the tightening of the hose clamp directly in front of the turbo. But anyway better to have a clean engine !

I'm not 100% sure what it is to be honest. But it looks like something from the Japanese market installed to improve efficiency. Here's a photo of it, plugged straight into the rubber hose with a suspicious looking brown substance coming from the valve. It was sitting just above the lower filter chamber that you describe.

I've only removed one of the cross over pipes, I'm wondering if it's worth taking the second one off and cleaning it as well.

 

[Eurasiaoverland]

Seems that you are not the first to find this snake oil canister on their Japanese import (though it says Made in EC...)

H

Thread 'Celcat in HDJ81...stay or go?'

Apr 18, 2017

Does anyone have any idea what this "Celcat" product is that is currently installed in our HDJ81 (1991, RHD) Land Cruiser (see photos in this post)? It was there when we purchased it, looks to be aftermarket, and probably done by the previous Japanese owner. The "Celcat" is a red, circular container that has a shiny metal top with a single hose that leaves from the top of the "Celcat" and joins the post-filter, pre-turbo air hose. The fact that there is a single hose makes me believe it is feeding something into the air intake, or vice versa (aka, not a two way street).

I found one...

• HillCountryTX
• Replies: 7
• Forum: Diesel Tech / 24 volts

Good that the brown stuff is not coolant residue though!