Engine compression tester for a 450 / Coolant in oil pan

[MyJD450]

Hello all. This is a great site for us John Deere owners, especially a new one like me who is learning. Thank you to the administrators!

I have a straight 450 dozer, with the 4-202 DIESEL engine, that has coolant leaking into the crankcase. I will begin to work on removing head to check for head gasket leak. Before doing so, since I will be getting into the engine, I thought it would be a good time to complete an engine compression test. Does anyone have any economical ideas on a set up to accomplish this, homemade or otherwise, or any other adjustments to engine while being serviced? I see various compression test kits, with multiple adapters, that specify many makes of engines for vehicles and some tractors but have not seen one with John Deere. Thoughts on best way to remove the injectors? I hear that they can be challenging. Also, any tips to pinpoint source of coolant intrusion to oil system?

Thanks in Advance!

Wes

[LeonardL]

You can buy a universal compression kit from E-Bay or Amazon that should do what you need done. I think even Harbor Freight and Northern Tools have a version that will work on your engine. Never heard of a 4-202 engine. Not saying they don't exist I'm just saying I've never seen one. Most early 450s I've been around had the 4-219 naturally aspirated engine in them. Look for a kit that will do Stanadyne/ Roosa Master pencil injectors.

[Jim B]

The 202 was the engine after the sleeve deck diesels in the 2010s. They are individual sleeves like the 219. The 202 was built a relatively short time compared to the 219. They look the same. The 202 used the pencil injectors, like the 219. The 219 will bolt in place of a 202, in fact at least one of the block casting numbers shows up in both engines. They are only 17 cubic inches different. The 219 has a .160" larger bore and .020 longer stroke than the 202, so it won't make a difference unless you have to get deep inside of yours. Then it is a case of use the casting number, measure parts, and checking the seal arrangement on the liners.

The 180 gas engine was made at the same time as the 202 diesel engine, then they went to the 219 in diesel and gas. The 202 and 219 will bolt in place of the 180 gas. I have a 2020 Ag tractor that will likely get a 219 diesel if the 180 gas dies beyond a rebuild and the rest of the tractor is serviceable, as there are more of the 219s around than 202s. I did an in frame on the 2020's engine a couple years ago so ended up doing some studying on the 180s, 202s, and 219s, to get the right liner kits for it.

[LeonardL]

Thanks Jim... Now I know!!

[MyJD450]

Gentlemen,
Thank you for the reply and knowledge shared. I removed the head and oil pan. Looks like coolant is getting past liners. Will do an in-frame overhaul. Jim, I am assuming that this has a\the 202 only because the repair manual given with my recent purchase designates it as a 202. Engine casting number is T24961. There is a casting number inside the head, not at dozer now to see. Do you think the head casting number would help identify whether a 202 or 219? Is there a website that provided the information you share available for me to view?

Thanks

[Jim B]

The info I shared was gathered from researching parts catalogs, service/technical manuals, operator's manuals and other sources as I was trying to get correct parts for different machines and engines. On the 180 gasoline engine in my 2020, I ended up finding serial number info in the JD service manual for a question the dealer parts manager couldn't find the answer to. I don't know of any one source, what I found was spread out. A true machine shop will have access to some info compiled in manuals they need related to rebuild machining. You can find some of the casting numbers in the JD parts catalogs when they were used to identify items like the correct liners for a given block. For say a head, you have to compare a part number as well as casting numbers to see if a later one was a replacement for the earlier one, based on a serial number (engine or tractor). Knowing the 180 gas and 202 engines were used in the same tractor says the block length would allow interchanging (with use of the correct accessories). Finding the same block casting number used for a 202 and 219 says those engines could interchange, etc. John Deere and likely some other manufacturers had re-power manuals from which they could tell what engines and accessories would allow different engines to be used as replacements in machines. I don't know of them being available on the open market.

I haven't researched it but it would not surprise me if the head could be used on either engine, so it would not be a positive identifier. I expect you will need to mic things up and compare liner sealing arrangements.

[MyJD450]

Looks like I have the 202 engine based on comparing parts to engine bore specs, rebuild kit information on correct kit using push rod no. and engine block casting number. Then to make me feel even more sure, your information of larger bore size for the 219. I appreciate the help!