M18 seal problems

[Sam Mac]

Vince

I just got 2 CH22's from SEW for $1350.00 each & $157.00 shipping

[BCDSFCRET]

Did you ever check the pressure relief in the valve cover?
If the breather valve is bad it will cause your main seal to blow out.
Kohler has a kit for a replacement. Cost is $10.00 app.
I have had several of my Kt17 and M18 with bad breather valves.
Should cure your seal problem.
Brian

[Tater305]

yes i check the relief valve and i changed the spring out of another one and lowered the oil pressure to about 35lbs and i did check the breather, i actually took all the breather stuff out of it and it still leaked out the seal. somebody suggested the crank may be messed up were the seal meets the crank or a little wore and the seal isnt sealing all the way around the crank. i pulled the motor and am in the process of a motor swap i will post pictures and a description of what i did, but a broke ignition has me held up

[Matt G.]

How are you 'checking' the breather? You are not likely to tell if it is bad by looking at it, and removing it will tell you nothing- if it worked right without it in there, it wouldn't be there in the first place.

[Vince_o]

Sam

Joe called me today and he told me you had gotten one, or something like that. Il have to check to see what they are going for. Ill bet the vert shaftes are chieper than the horz we use.

Dannys command 18 for some reason has large amout of blow by in one cylinder. I did a leak down test on it fri afternoon at work and it was around 50% in one clyinder and in the other it was about perfect. Something crazy is going on in there. I have another command on the floor with a broken rod, so Ill se where Im at with the bore and all on that one. Ill measure the end gap too on the piston with the broken rod. It didnt take out the cam, so Im lucky in that aspect. Too late in the season for a rebuild now, were starting to get busy at work so Ill drop in the 20 out of the 2072 in the 482 for the summer. If the eng runs good, Ill use it to mow grass with all year, then put it in the 20 with the loader on it.

[Tater305]

ok guys got a question. I was debating on pulling this motor apart to find out if there is something making it leak out the front seal. Somebody said there might be a partial blockage in one of the oil passages doing this. So maybe I messed something up when I put this motor back together a couple years ago. I have been debating on pulling the motor apart to check but I want to get other peoples opinions about doing so. This isnt my first M18 I have had apart so I know what I am doing its not like this is my first time. If I find nothing then I am not out anything except some sealant and a couple hours, plus this will give me a chance to clean all the oil and dirt off the motor. So what do you guys think?

some thing else to add the seals are new but the front one is leaking wear the seal meets the crank. I was told maybe the crank is messed up some were but the only way to actually look is to pull it apart.

[Vince_o]

Tater

Is it posible that there is a nick or burr on that crank?

[Tater305]

its possible there is but I cant say for sure. To get a good look at it I would have to pull the motor apart. I can pull just the seal but that would mean a new one and I dont wont to go there again.