engine seized or hydraulic lock?

[ovrszd]

Because many engines don't have valve stem seals or they use "umbrella cups" which only protects against oil splashed off the rocker arm. The valve guide may only extend 1/2" above the head so flooding the area with oil causes the valve guides to be submerged in oil. Under normal running conditions, oil just dribbles off the rocker arms in small amounts and runs down the push rod holes or oil drains.

And then, there's the case(s) mentioned above where oil may go directly to the intake ports because of some strange design.

My old JD420C has a baffle in the filler tube. If you try to add oil too fast, it back flows all over the top of the engine.

I'm sorry, but I ain't buyin this. Pull the valve cover on whatever engine you believe to have this problem and take a picture. Post it here and we'll discuss it.

 

[CCWKen]

I already know. If you want to disprove it, pull a valve cover yourself. I just did a valve job on the 420 and I'm not breaking new gaskets.

In the case of the intake flooded with oil, I think it had something to do with a sealed crankcase emission system. A hose or port ran from the rocker cover directly to the intake manifold.

 

[s219]

I'm sorry, but I ain't buyin this. Pull the valve cover on whatever engine you believe to have this problem and take a picture. Post it here and we'll discuss it.

You can do a search here and a few threads will pop up that go into more detail.

 

[davesl708]

Have you checked your engine oil level. If a bad head gasket or oil getting trapped in the valve cover the level will be higher if coolant is getting in the cylinder and lower if the oil is trapped in the valve cover. If trapped in the valve cover the drain ports are plugged.

As to hand cranking it can be done but you will have to hold pressure on the compression stroke till the pressure can bleed off past the rings. If coolant in the cylinder it will take longer and you will find coolant in the oil.

Loosening the injectors is the quick way to find out if hydro locked. Loosen all of them and the compression will be reduced and you can crank it over.

 

[747driver]

http://www.tractorbynet.com/forums/...-kioti-oil-change-went-wrong.html#post4278017

Here is my post from last month. Yes, my OM and WSM all say to fill oil from the valve cover fill port. I discovered a second oil fill port down lower on the block that lets the oil go to the oil pan instead. I filled to fast when i used the valve cover port resulting in oil from filling to fast to enter the breather tube and then into the intake manifold. I did have a partial hydro lok when i first started the engine after the oil change. On 2nd attempt the engine started right up. This is my 1st tractor and only have 250 hrs. on it, so this is all a learning experience for me. Engine still smokes but is slowly getting better. I may have to take it to the dealer to see if maybe a pushrod got bent or valve seal was damaged. Kioti is aware of the problem from filling to fast at the valve cover port, but they should have noted that in their manuals. Thats my story !!

 

[Leejohn]

Quote " Hi,
I changed oil on my l2650 gst and ran for 10 minutes to check for leaks then shut it off."

If that engine is hydraulic locked it's not oil. Could be fuel locked if a injector was stuck open. Just pull glow plugs then turn over, they come out real easy. If he thinks engine is hydraulic locked he shouldn't be trying to turn it over with the starter.

 

[dodge man]

I agree, not likely hydro locked. I agree with someone else who said they are hard to turn over by hand. Most likely a starter, battery, electrical thing. I'm not sure why the OP thought it would be hydro locked?

 

[ovrszd]

I think we are all having a good informative discussion about a situation that we will never get resolution about. The OP posted once and has not been back. We are all offering advice to a blank screen.

 

[Grandad4]

Kub made that engine for about 20 years and there must be many, many thousands out there. Don't know what actual dealer experience was, but don't think there's a single reported instance here or generally on the interweb of oil-fill induced hydro lock in a D1402.

More likely cause of hydro lock would be a misadjusted 3 pt lift causing backfeed of hyd fluid through the hyd pump, overtopping the crankcase. But I'm still for eliminating weak battery, etc. as the cause first. Hope OP has made progress and can give an update.

 

[oldpilgrim]

I think we are all having a good informative discussion about a situation that we will never get resolution about. The OP posted once and has not been back. We are all offering advice to a blank screen.

could be, but I'll throw in my 2 cents.

I'd pull the starter out. It's possible that the starter gear is engaged with the ring gear and is jammed there.

I've had this happen.

He would still hear the solonoid clunk of the solonoid engaging as he says:

Starter was engaging with a solid click and buzz it was trying.