anarobic gasket dressing on water pump

mickey harmon

New member

Equipment
L2650
Jun 18, 2019
13
0
1
bartlett
I have an L2650. I am replacing the water pump. Can anyone tell me if it is safe to use an anaerobic gasket dressing safe to use, or can the dressing clog any thing up? the reason I am replacing is it starting leaking. I'M concerned there might be some slight imperfections in the gear case.
 

greenacresnorth

Active member

Equipment
L2501,BH77
Feb 18, 2018
175
28
28
38
Morganton,NC
anaerobic will work fine with coolant but will not fill large scratches or warps like RTV will. I use grey RTV on oil and water joints, never had a problem.
 

North Idaho Wolfman

Moderator
Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
30,249
6,407
113
Sandpoint, ID
Re: anaerobic gasket dressing on water pump

You want to use the factory gasket and RTV, anaerobic won't work for that! ;)
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
555
83
USA
I use Detroit Diesel anerobic sealant or Kubota 3 Bond on about everything. I especially like the 3 Bond as well as gaskets.

One word of caution. If you replace the water pump, get a Kubota pump and not a cheapo Amazon of Flea Bay one. I believe Wolfman went through the generic water pump issue a while back and had major issues from a minor replacement.
 

mickey harmon

New member

Equipment
L2650
Jun 18, 2019
13
0
1
bartlett
I do have a kubota water pump. I was wondering if the little bit of the sealer that compresses out would harm anything inside the system, since the sealer does not cure with the presence of oxygen.
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
555
83
USA
I do have a kubota water pump. I was wondering if the little bit of the sealer that compresses out would harm anything inside the system, since the sealer does not cure with the presence of oxygen.
No and 3 bond is not soluble in coolant or oil. Neither is any of the other mentioned gasket sealers.
 

BruceP

Well-known member

Equipment
G5200H
Aug 7, 2016
851
368
63
Richmond, Vermont, USA
I replaced the waterpump on my Kubota a couple years ago. After much research, I opted to simply use the proper gasket installed 'dry'. (It will tend to 'swell' when antifreeze touches it after installation)

I DID make sure that all mating surfaces for the gasket surface were clean. flat. and parallel. A light rubbing with a KNOWN FLAT sharpening-stone goes a long way to removing burrs and high-spots. Any knowledgeable machinist will tell you that they use a matched-pair of ground-flat stones to remove burrs from mating surfaces.

Also make sure to torque the fasteners evenly and equally. (not unlike installing a wheel.)

The only leak I encounterd a couple weeks after replacing waterpump was a hoseclamp which needed to be snugged. (DO NOT over tighten hose-clamps lest the hose will be permanently damaged.... just snug enough to not leak)
 

lugbolt

Well-known member

Equipment
ZG127S-54
Oct 15, 2015
5,214
1,899
113
Mid, South, USA
as long as the surfaces are clean of old gasket and undamaged, a dry gasket is all that is needed. I've seen WAY too many people put silicone or other "dressing" on gaskets unnecessarily; a lot of the time it's more trouble than it's worth. It is simply not needed in most applications.