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Well, the good news is that I think I can close this thread out. I had the heads milled .005" each and they came out flat as Florida. I reassembled the engine using the new upgraded head gaskets and it started and ran after about 3 tries. The head gasket set from Memphis Equip was really...

Rustystud: Thanks for the information. I will look around and order a compression gauge. I had no idea that these engines were used in tractors also. BTW, I put a straight edge on both heads after cleaning off the gasket and other junk and found that they are flat everywhere except between...

No idea, but I hope they burned up slowly or went out the exhaust. The cylinders look great and aren't scored.

Donnerwetter58: Absolutely. The problem is that this is my very first attempt to troubleshoot a diesel problem and none of my three compression gauges fit the FI ports and are even of the proper range. It is a 100 mile round trip to the nearest town of any size which eats up time and fuel. I...

Well, I got the heads off and sure enough it was as we expected. Broken and open gasket between #5 & #6 cylinders. I have enclosed three photos taken prior to clean up and inspection. The one of the ports shows how the reverse gas flow happened at low engine speeds. This has been an...

gringeltaube, Exactly my reasoning. The intake of #6 looks as sooty as the exhaust but on all of the other cylinders, including #5, they look normal. The intake ports have a reddish-orange hue and, of course, the exhaust ports are sooted up. When I finally get the head off and upside down I...

The Hulk, I don't think the #6 intake port is blocked. I think the higher pressure from an adjacent cylinder during its firing cycle is leaking into #6 while the intake valve is opening and the higher pressure forces itself out the intake and through the turbo to the air cleaner. This only...

That's the way it looks. I was seeing back flow through the air cleaner inlet at the turbo. Positive pressure there is a no-no. I suspect a blown head gasket between #5 & #6 that would let high compression gas from 5 into 6 while the intake valve was opening. I'll know more when I get the...

I am partially through the head removal and #6 intake port is completely sooted up. The other five have clean original colors. I can't tell more right not because I can't lift the head. Shop crane will solve that problem soon.

I see Memphis Equipment has a head gasket set for around $267. They will probably get here by the time the heads are back from the machine shop. I have difficulty with the burned intake valve idea and instead am thinking that it might be something else that is interfering with the valve...

Exactly my thoughts about the symptoms. I will attempt to pull the heads tomorrow. I will need to get some gaskets, etc. Around here, central NM, the possibility of doing that is nil.

New development. I rechecked the IP alignment today just to be sure all the indicators were in the right place. In order to do this I took the front valve cover off and watched the valves for #1. Sure enough, when the timing mark on the damper was lined up so were the two marks before the Ip...

I just had the valve covers off and it is clean as a whistle in there. No milky foam collected on anything. It looks like this engine just went together after a rebuild. That's the problem there are no other symptoms of a head gasket leak. But, I don't drive this truck much so it could still...

Yeah, if I only had some supporting evidence of coolant in the combustion I would be able to proceed. This thing is running so rich that in a couple of minutes it fills my 1000 sq ft shop with smoke and you can't stay in there because your eyes burn too bad. It's a wonder that someone has not...

Not sure what is happening to my responses to the posts so I will try again. gringeltaube: Here is the way I checked the IP. I rotated the engine clockwise until the timing marks on the damper lined up with the pointer that is visible under the air compressor. I removed the small rectangular...

I am really starting to think you may be right. This problem is getting worse which is consistent with a small leak getting washed out and leaking more. I wish I had other indications like bubbling in the radiator or water in the oil or oil in the water, etc.

I use my 1968 Kaiser Deuce to haul a 1000 gallon water tank. I can usually make it up the hill between the water source and our place in 2nd gear but last week I had to downshift to 1st and I noticed a rough idle and white smoke from the exhaust. The engine is a LDT-465-1D that was overhauled...