Replacing Thermostat to Water Pump O-ring

Post Reply
mlacomb
Regular Member
Posts: 20
Joined: Sun Feb 12, 2017 3:36 pm

Replacing Thermostat to Water Pump O-ring

Post by mlacomb » Sun Apr 09, 2017 6:47 pm

I knew I was going to have trouble; trying to throw in the thermostat housing quickly with a new o-ring into the water pump. The new o-ring seems to have a much tighter fit and I stupidly tried to cram it in there (dry... yes, I know, like I said - stupidly) with bolt torque and cracked up the housing.

So - new housing and thermostat on the way. What are we using to lube this o-ring up in order to help it slide in?


User avatar
Webmaster
Site Admin
Posts: 534
Joined: Sun Oct 24, 2004 1:26 pm
Contact:

Re: Replacing Thermostat to Water Pump O-ring

Post by Webmaster » Sun Apr 09, 2017 7:21 pm

You can probably use just about anything safely. Motor oil, silicone lube, etc.

xvert
Regular Member
Posts: 100
Joined: Thu Aug 29, 2013 3:05 am
Location: Sibiria

Re: Replacing Thermostat to Water Pump O-ring

Post by xvert » Sun Apr 09, 2017 11:57 pm

Indeed, the new original O-ring is not suitable even with grease. When installing the thermostat, I did not fully tighten the bolts.

RVAFreestyle
Regular Member
Posts: 160
Joined: Tue Dec 22, 2015 4:09 pm

Re: Replacing Thermostat to Water Pump O-ring

Post by RVAFreestyle » Fri Apr 14, 2017 5:15 pm

I would advise not to use motor oil or grease as dependent on the material your parts supplier uses- may not be suitable for petroleum exposure.

What I like to do is take clean antifreeze and a gloved finger and coat the oring or silicone spray on a finger and lube it up.
ASE Master Tech L1, X1, A9
ASE Master Collision Repair Technician
ASE Parts & Collision Estimator Certified

2010 Expedition, 2005 Freestyle, 1999 Explorer Sport, 1997 Mustang GT

mlacomb
Regular Member
Posts: 20
Joined: Sun Feb 12, 2017 3:36 pm

Re: Replacing Thermostat to Water Pump O-ring

Post by mlacomb » Sun May 07, 2017 6:33 am

I ended up ordering a new motocraft thermostat which came with both gaskets. Also a new housing. The motocraft included gasket was about 80 percent of the thickness of the other gasket I had purchased and slid right in with water. I had thought I originally purchased an original motocraft gasket, but apparently not.

Post Reply