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Thanks, I have been reading some information from the Mahle website and they talked quality. I didn't realize they were based in China. I will contact them and see if they can match the bearings.

Has anyone had experience with bearing replacements on these tractor engines. I have taken out the pistons, no scuffing and within spec, but I need to replace worn rings. Bores are within spec. The rod journals mic up fine but the bearings are worn so need replacing. The main bearings cant be...

Thank you I do need luck. My compression is very low on one cylinder 200psi, all others are 380psi. Assuming this piston and sleeve are damaged, I was hoping to remove the pan and the head with engine attached to the tractor, replace the piston and sleeve and hone it on the tractor. From my...

Thanks Gentlemen. The original oil is now in a 44 gallon drum mixed with the transmission oil change which had some metal paste on its magnet so all of that is contaminated. It has had two oil changes in succession so it has not had enough running time for metal to accumulate. I checked the oil...

Thanks for your help. JohnDB does have a M4500DT and we communicate frequently. He has been very helpful and shared information with me from the WSM. The engine is sleeved but it appears it has to be re-bored and honed after fitting. We are not quite sure if that is the case but if it does I...

Thanks for following JerryMT. When I first got the tractor I dumped the old black oil and didn't check it. I filled up with a Stou farm oil 15w-40 and hadn't realized there were two sump plugs to drain, there may have been some old oil still in it because it went black pretty quick so I drained...

Hey i would be happy to do that but I don't know if I mentioned in this thread I have an engine knock as well, maybe rings and rod bearing gone in #6. Bad rings I would put up with. 5.5 out of 6 is good, but if it becomes 5 out of 6 I don't think I am running and pulling a busted rod out. Like...

Others are more experienced than me but its unusual to get two pistons with zero compression unless there is something blown between them. I assume the pistons are side by side and the good one isn't the middle one? I did a leak-down test and it really helps to find where the compression leak is...

Thanks JohnDB. Very interesting article which seems to confirm the symptoms I am having. The article states it is important to locate the knock before stripping the engine, which makes sense in case it is something else. I am inexperienced using the stethoscope method and I am having a problem...

Thanks GeoHorn, I am just trying to narrow down what the engine knock could be which you answered in my other threads. I see your reasoning and agree it can be quite a number of things causing it. Bottom line is i will get a few mechanics to give an independent diagnosis and then strip it down...

I see on some you tubes, the test for play or failure in a rod bearing, is to tap on the piston with a mallet and screwdriver on the down stroke after TDC. There is supposed to be some slight downward movement, or at least not a solid metal sound if the bearing is bad. I am skeptical if this is...

Not really, I will have to pay someone to come out. The problem is finding a mechanic who knows what he is doing from experience, than someone who things he knows and educated guessing. I know a couple of mechanics and get a few independent opinions. I think the combined symptoms of low...

Not at hot idle, hot running (medium throttle). Very old tractor 1978-1980. Manual says 45psi with allowable limit 35psi at "rated speed" whatever that means. All I can find in the manual is "Maximum Bare Speed" in a different section which is 2800 rpm

Thanks rbargeron, and the photo is helpful. My other threads go in to detail of the problem. I always thought I have rod knock, but other replies have suggested its possible injector nailing. From my experience with cars, the sound seems deep in the engine but i cannot locate where it is...

Is it not possible to drop the sump on a M4500DT to inspect the bottom end bearings, without removing the entire engine from the tractor?

My error of grammar. The lack of oil pressure is not causing the rod knock, the worn bearing is causing the knock and the low oil pressure is the sign of that's what the problem is. ( thinner oil getting past the side of the bearings instead of being forced through the oil passages in the...

Put tractor together after all the tests run it doing “Brush Hogging”, what we call “Slashing” in Oz. Knock is still present especially idling, can’t hear it under load. Injectors popped okay and sprayed well, One a little bit uneven. IP seems to spurt evenly. Oil lamp flickering on and off at...

Thanks Roadworthy, I am in Australia and I would have to get " Sea Foam" shipped in. There is a company here called cost effective maintenance that sell two products for carbonized cylinder heads and stuck rings, they claim 80% success of improved compression. Its a decarboizer that goes in the...

Further my previous thread: low compression and leakage past rings on one cylinder Cylinder 6 bad leakdown test results, worn/broken rings in that cylinder, with carbon build up and blow-by. Tractor not worth reconditioning so I have decided to keep running until it gives up. Question: is it...

I guess brake cleaner or if you meant brake fluid is less/non explosive. An oil change could be in order after using that. I put a some shellite in my bores and hand rotated it, so it would clean any oil marks off the cylinder walls, before looking with the borescope. I will be dropping the oil...