Hello,
My 955H engine has a water leak around the fuel injector mounting area (see attached photos). Any thoughts on the fix? Is it easy to do with basic tools? Thanks for your help.

Eldon:

That's not a big job but you will need the 5F8353 splined bolt tool to remove the pre-combustion chamber to replace the upper seal and bottom washer.

Be sure to drain the cooling system before disturbing the chamber or you will have water inside the engine.

Ekasl, I would be very tempted to steam clean your radiator,then strip off the oil cooler/s (Water/oil heat exchangers) from the engine to clean out the water side of them, as the usual cause of C/chamber seals leaking is the C/head is not cooling correctly, the steel washers at the bottom of the chamber come in about 6 hights to set the glow plug into the correct position.
tctractors.

All good info. given but I think to prevent later troubles I,d change all 4 chamber seals for good insurance. In my years around the H models I did see a heating problem with esp. the earlier H,s esp. if you didn,t keep them serviced well so they cooled properly.Keep the outside radiator & area clean & as TC said keep the inside of the cooling system serviced well too. Saw many of the heads cracked on them due to a cooling problem.

Picked up parts for the 955, 1 small round gasket and about 2" o ring plus the 5F8353 splinted bolt tool. Now I just need to know
how to use the tool. What holds the chamber in place? A lock bolt ??? Threads, left or right hand ???

Thanks,
EKasl

They have right hand thread the same as a std. bolt so it,s no biggy to get them out.What you need to do is get a can of never seize & coat the bottom threads good on the chamber & also coat the seal at the top.There is a torque for the chamber when it goes back in but I don,t have the spec. for it but I,m sure OM has it.I think your making a mistake by not changing the other three seals on the other chambers as heat probably caused the one to leak & it won,t be long till the other three will go.It will save draining the system again right away & you,ll not have to worry about loosing water & a possible overheating of the engine & cause more problems like a cracked head.

The installation torque required is 150 ft-lbs. You will be lucky if the one small gasket gets you by. These come in various thickness to allow you to index the position of the glow plugs as tctractors mentioned earlier.

Yes there is a few different thicknesses of the bottom washers to get the glow plus to come out right & I was pretty sure the torque was 150 lbs. but didn,t want to post it if I wasn,t correct. I only have some specs. on an engine or two in my collection but not the equip. with the D333 in it.

Much appreciation to AJ, SJ, Old Magnet, and TCTractors!

Replaced the seals and shims for all injectors. The 955H seems happier.

Will run it for a day or two and then clean the water side of the old cooler and pressure wash the radiator.

Thanks again guys, you were a big help.

ekasl