Something leaking from top of engine

[senorquill]

Hello all,

What could be causing this yellow sort of glue like material to come out of the back side of the forward most fuel injector? I'm not sure exactly where it is come out, but photos help to explain. The engine is running fine. There was also some tiny piles of what looked like water bubbles.

Universal M25XP (1700 hrs)- 1987 C34

Ryan

[senorquill]

Pic 2

[mark_53]

Looks like blue thread lock to me.  Are you color blind or an I not seeing yellow?

[Noah]

Blue thread lock will not STAY blue when old. It looks like saltwater corrosion mixed with debris/oil??? —but I am not a mechanic. Do you see liquid emerging around there when engine is really clean and running?

[Ron Hill]

Ryan : I'd cleanup that area and keep an eye on it!!  It may just be the old dirt from 1987!?!

A thought

[Stu Jackson]

Ryan : I'd cleanup that area and keep an eye on it!!  It may just be the old dirt from 1987!?!

A good possibility that had also occurred to me and that those very helpful photographs can't begin to help us "know".

[Admiral_Swellson]

This is just a guess but it could be Blue Devil Gasket Sealant.

https://www.amazon.com/BlueDevil-Head-Gasket-Sealer-ounce/dp/B000NOO798?th=1

What it looks like after: https://www.youtube.com/watch?v=LiDROcUG3iQ

[senorquill]

Gents,

I cleaned it all up and discovered a crack on the plate behind the thermostat (pics attached). After running the engine up and getting hit hot, I was able to notice coolant coming out of the back side of that plate. So the goopy material was coolant that was basically leaking and than heating up and turning into basically a Vaseline type material. Anyways, I going to tighten up the 2 bolts in the pics to see if that slows the leak, a leak confirmed since I. loss coolant every time I motor around for an hour or so.

I'm going to order a new replacement part due to the crack. Any body replace this? Looks like I got to take a lot off the front of the engine to do it. Any info would help.

V/R,

MQ

[Ron Hill]

Guys : It is absolutely amazing how much easier it is to find leaks etc. on a CLEAN engine!!!

A thought   

[KWKloeber]

What plate behind the thermostat? 
The picture pointing to the thermostat housing isn't helpful as it doesn't show what plate you're referring to.
Can you post a better picture?

[senorquill]

What plate behind the thermostat? 
The picture pointing to the thermostat housing isn't helpful as it doesn't show what plate you're referring to.
Can you post a better picture?

The par with the crack on the plate, which the thermostat housing is screwed into, is part number 13 on the Water Flange Group (Flange Water-300233).

It looks like I have to remove the entire Water Pump Group casing to replace it, the last picture with the red line going around it.

Has any replace the Flange Water before? What am I getting into?

MQ

[senorquill]

The large part that has to come off first is the Gear Case Assembly #2 on this picture.

[KWKloeber]

PS: Messicks.com is a decent place to order parts online.  Many of the Kubota manuals I posted came from those folks.


Ahhhh, ok NOW I see. The bottom picture didn't open when looking at the post on my phone.
Check the service (Technical) Manual on the Wiki - it might discuss something about disassembling the gear cover.

The wiki will also have the Kubota part numbers for the Water Flange and the Gear Case gaskets, o-rings.  I would replace the oil relief valve and TStat while you have it off.

I wonder what caused the crack. Maybe the alternator bracket?

[senorquill]

When you put the new gaskets back is their any type of grease or sealant that goes on them, or do you leave them as is? Thanks,

MQ

[KWKloeber]

It's not necessary but if it makes for an easier install Kubota suggests a non hardening gasket sealer, one side only, and apply the gasket. I don't recall the Permatex part number number for that type but it's been called out on here before if you do a search.