Cylinder 2
Builds Old Landy: An HJ45 Story/Build Thread (1 Viewer)
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Cylinder 3
Cylinder 4
Cylinder 5
Cylinder 6. Piston has carbon build up which knocks down with a plastic scraper
We will also measure the bores next weekend. We will be pulling the oil pan and bottom end bearings to do some more plastigauge measurements. We will also be inspecting the piston rings and glands.
We also pulled the lifters which showed some webcracks and pitting. This was the only component that seems to be of issue and will be replaced.
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Depending on measurements on bores, we will hone and rebuild motor.
Michael B
SILVER Star
CD you need to apply clean oil to the cylinder walls since you throughly cleaned them with laquer thinner. It will inhibit rust but more importantly you still need some lubrication for the remaining dissassembly steps.
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I didn't see any safety glasses when cleaning the cylinder head. Yeah, I know we all do that sort of thing once in a while. Except me. I don't, because if my wife caught me not using safety equipment...
Good catch. Much appreciated!
What causes the web cracking and pitting?
My 2H is trashed
Shows same lifter issue. Unsure of motor mileage.
We will be pulling the pistons and inspecting/ measuring rings/glands. Want to make sure ring failure does not happen and confirm that rings have not eaten into pistons. Reportedly happens on 2H and 12HT engines (see article below). My older son Liam has been trolling Mud and found it.
12HT engine rebuild
Incidentally, ring failure has occurred on 12HTs.
Second link above suggests getting 12HT Alfin piston ring inserts. Need to look into whether they can be put on 2H pistons in standard size as an upgrade to 2H piston rings. Anyone done this??
We are not planning on 12HT pistons as part of the rebuild at the current time.
There is plenty of good run time on 2HT with mild boost (<10psi) on 2H pistons and robust engine cooling. @mongoose2231 and tons Outback have vetted the run time.
Shows same lifter issue. Unsure of motor mileage.
We will be pulling the pistons and inspecting/ measuring rings/glands. Want to make sure ring failure does not happen and confirm that rings have not eaten into pistons. Reportedly happens on 2H and 12HT engines (see article below). My older son Liam has been trolling Mud and found it.
12HT engine rebuild
Incidentally, ring failure has occurred on 12HTs.
Second link above suggests getting 12HT Alfin piston ring inserts. Need to look into whether they can be put on 2H pistons in standard size as an upgrade to 2H piston rings. Anyone done this??
We are not planning on 12HT pistons as part of the rebuild at the current time.
There is plenty of good run time on 2HT with mild boost (<10psi) on 2H pistons and robust engine cooling. @mongoose2231 and tons Outback have vetted the run time.
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FJBen
SILVER Star
Engine Australia - website seems down, and SMS Diesel smsdiesel.com.au have rebuild kits and pistons, etc for the 2H.
2H Alfin pistons in different sizes std, .50 and 1.0mm ART brand from Japan. They also have liners to match as well. Did you determine if you 2H has liners or not? Is your 2H out of an HJ47, HJ60 or HJ75? Seems like there might be some small difference there, not sure.
Cylinder Parts
I used engine australia for liners/pistons and rebuild kit. I have Alfin pistons in my 13BT. A lot of Japanese bearings/parts for it. Seems like quality. I can't vouch for SMS but have read a few good things on it.
As I stated in the diesel section, I would replace those lifters and honestly rebuild the whole thing to make it reliable for another 30+ years. They don't look good which makes me really wonder about the camshaft. Take it to a machine shop and let them look it over and go from there.
2H Alfin pistons in different sizes std, .50 and 1.0mm ART brand from Japan. They also have liners to match as well. Did you determine if you 2H has liners or not? Is your 2H out of an HJ47, HJ60 or HJ75? Seems like there might be some small difference there, not sure.
Cylinder Parts
I used engine australia for liners/pistons and rebuild kit. I have Alfin pistons in my 13BT. A lot of Japanese bearings/parts for it. Seems like quality. I can't vouch for SMS but have read a few good things on it.
As I stated in the diesel section, I would replace those lifters and honestly rebuild the whole thing to make it reliable for another 30+ years. They don't look good which makes me really wonder about the camshaft. Take it to a machine shop and let them look it over and go from there.
No liners on this motor. It is >1985. I usually tell it is a non liner engine if it has a nut attached to the front timing cover in front of the injection pump. We will be pulling the camshaft. If items are within FSM spec, we will reuse. Otherwise change. Agree. Lifters will be replaced.
Once we tear down the motor we will bring it to spec.
Once we tear down the motor we will bring it to spec.
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Also uploading some pics of the rocker arm pads (I=Intake, E=Exhaust). Pic are arranged by the cylinder # they serve. Overall, it looks pretty good. Curious about the square shaped outline on some of the rocker arm pads. Looks OEM and too good to be weared perfect.
These pics are also posted in the diesel section in the link @Cowboy45 shared earlier.
These pics are also posted in the diesel section in the link @Cowboy45 shared earlier.
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