L175 N844LT engine 2.2lt

I just purchased a non-running N844LT engine out of a 2008 model L175 (thanks again Tazza) It appears this engine was replaced with a new crate engine in April 2010, it has been sitting in a dealers factory since then. I assume it has some serious problems otherwise they would not have gone to the trouble of replacing it, but at a quick look over we can't see the obvious reason for the transplant. We have not dismantled it yet, just carefully looking for the problem. The engine turns over 360degrees easily and has compression, the sump has been changed and none of the big end bearing caps are discoloured. The bottom of the engine has not been cleaned but the inside is spotless, even the pistons are still clean alloy, no carbon on them at all. The rocker cover has been removed, we assume to check for bent push rods or broken cam, all are working OK. Exhaust manifold is clean inside, so no sign of excessive oil use. The engine has net been cleaned externally and there is no sign of water leakage or head gasket problems. So before we get into it I thought I could ask if anyone has heard of any problems with this particular model or any thoughts to what the problem could be. thanks in advance, Gazza

Two possible problems I can think of. One is the engine got hot and scuffed the cylinder wall in one or more cylinder which would cause the engine to have alot of blowby. The second is bent rods cause by filling the engine with oil to fast. On these engines if the oil is supplied to fast when filling the crankcase, the oil will overflow the baffles under the valve cover and get into the intake side and then oil will get on top of the pistons and since oil will not compress the rods will bend.
If you are in the US you may have an illegal engine. I am not sure how engine rebuilders get around the EPA rules on emissionized engines. If this engine was replaced by a new engine this engine was to be returned to the company. New Holland's core charge on a tier 3 engine is 1500.00 per cylinder, so your engine had a core value of 6000.00. The theory, I believe, is if there is X number of engines out in service there should never be more than that amount. The other possiblility is you have a tier 2 engine from a loader older than 2008. When you go for parts you will need the engine serial number so you get the right parts.

Mike10 said:

Two possible problems I can think of. One is the engine got hot and scuffed the cylinder wall in one or more cylinder which would cause the engine to have alot of blowby. The second is bent rods cause by filling the engine with oil to fast. On these engines if the oil is supplied to fast when filling the crankcase, the oil will overflow the baffles under the valve cover and get into the intake side and then oil will get on top of the pistons and since oil will not compress the rods will bend.
If you are in the US you may have an illegal engine. I am not sure how engine rebuilders get around the EPA rules on emissionized engines. If this engine was replaced by a new engine this engine was to be returned to the company. New Holland's core charge on a tier 3 engine is 1500.00 per cylinder, so your engine had a core value of 6000.00. The theory, I believe, is if there is X number of engines out in service there should never be more than that amount. The other possiblility is you have a tier 2 engine from a loader older than 2008. When you go for parts you will need the engine serial number so you get the right parts.

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After looking at your avatar I guess you are from down under so you can scratch my previous comments.

Mike10 said:

After looking at your avatar I guess you are from down under so you can scratch my previous comments.

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Mike, thanks for the information. We will know a lot more this wekend when we carefully pull it apart. Now we know a few more details to look for. Cheers Gazza

Gazza said:

Mike, thanks for the information. We will know a lot more this wekend when we carefully pull it apart. Now we know a few more details to look for. Cheers Gazza

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Post pics if you can. Hopefully all will be good with the engine.

mahans7 said:

Post pics if you can. Hopefully all will be good with the engine.

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In all probability the only reason the dealer would replace this engine is because it had a serious problem, and a new engine would be the quickest. I'm hoping for the best but don't expect too much at this stage. On another note the crate that came with my engine is the same crate that their new engine came in, checked the part number on the tag as it was a Case part number. Same engine type and size as the New Holland engine according to the part number. Dont know if this was the only one available down under or maybe it could have been a cheaper option. pics to follow if needed, cheers Gazza

Gazza said:

In all probability the only reason the dealer would replace this engine is because it had a serious problem, and a new engine would be the quickest. I'm hoping for the best but don't expect too much at this stage. On another note the crate that came with my engine is the same crate that their new engine came in, checked the part number on the tag as it was a Case part number. Same engine type and size as the New Holland engine according to the part number. Dont know if this was the only one available down under or maybe it could have been a cheaper option. pics to follow if needed, cheers Gazza

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Good to hear you got delivery of it.
If it was me, i'd make sure the fluids are topped up and give it a start. See what is what, if there is a noise or smoke then work from there to work out what was wrong with it. If you are lucky, it is something easy

Tazza said:

Good to hear you got delivery of it.
If it was me, i'd make sure the fluids are topped up and give it a start. See what is what, if there is a noise or smoke then work from there to work out what was wrong with it. If you are lucky, it is something easy

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Well, some good news and bad news. Pulled most of it apart, cylinder head and vavle train all look real good. There are a few scuff marks on the back side on number 3 bore, when we pulled out the piston both of the compression ring gaps are in line with the scuff marks, this could be the cause of low compression/blow by etc. The scuff marks are only on this bore, just need to borrow a inside micrometer to check the wear on all of the bores. May get away with a hone and a new set of rings or it may need a rebore, we shall see. Gazza

Gazza said:

Well, some good news and bad news. Pulled most of it apart, cylinder head and vavle train all look real good. There are a few scuff marks on the back side on number 3 bore, when we pulled out the piston both of the compression ring gaps are in line with the scuff marks, this could be the cause of low compression/blow by etc. The scuff marks are only on this bore, just need to borrow a inside micrometer to check the wear on all of the bores. May get away with a hone and a new set of rings or it may need a rebore, we shall see. Gazza

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Its sounding like hone and new rings. You may get off easy on this one.

Gazza said:

Well, some good news and bad news. Pulled most of it apart, cylinder head and vavle train all look real good. There are a few scuff marks on the back side on number 3 bore, when we pulled out the piston both of the compression ring gaps are in line with the scuff marks, this could be the cause of low compression/blow by etc. The scuff marks are only on this bore, just need to borrow a inside micrometer to check the wear on all of the bores. May get away with a hone and a new set of rings or it may need a rebore, we shall see. Gazza

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Hi Gazza, I was wondering how you went with your n844lt? I have just bought a L175 with a blown engine. The head has been removed on this one and there are score marks on the bores. Any hints and tips would be greatly appreciated. Regards John