Boxer Thermostat

It appears my 79 BB512 coolant thermostat has a crack in the housing. This is the newer type which is a self contained unit which the parts catalogue shows as being used on the injected Boxer. It looks like a "cup and ball".

It is leaking from the part where the cup covers the ball (hope this is making sense).

Has anyone ordered one of these recently? From where and how much? Can it be sodered?

Got most of the hoses off last night. Going to pull the rest off tonight. Real PITA

 

Hi Steve,

I think, if i am understanding your question, the answer is yes.

I ran across a couple of threads on this site and the one that JRV started that mentioned that this was a "kit" installed on some of the cars. I believe this may also be in the workshop manual translated to English by Angelo Wallace but don't have it here at the office. I don't know if it was done at the factory or done later in its life.

When you look at the parts book, say on the owners site, the thermostat for the 365GT4BB and BB512 show a housing (I thinks its 4 way) that seperates to access the thermostat. Mine is a 3 way enclosed thermocouple which is downstream from the "T-shaped water casting" you are describing. It looks the same as the one in the BBi parts manual which, as you point out, is 106393.

I'll check the workshop manual tonight and post a picture tomorrow.

Drew

 

That's it Newman. That's where I read it. In the workshop manual there is a part about drilling two small holes in the thermostat itself to eliminate the vibration as well.

I just looked at the"cars sold" on Sheehan's site. The following picture is from a 79 carbed Boxer like mine. In the upper right you can see the black ball thermostat which is downstream of the T-shaped water casting. Just about all of the 512BB cars I looked at on his site show the same.
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Thanks David,

I may take you up on that. Let me see what I find tomorrow.

I have to get the thing out tonight (PITA). There is a small chance it could be a hose but I'm pretty sure the "hat" has become unsoddered from the "ball" after observing it under good light while running.

You don't happen to know the diameter of the smaller hose that exits the bottom of the thermostat or better yet a source. I'm sure Rutlands has one for $100 but $10 for the right ID hose with the approximate shape would be better. Mine has ballonned and needs to be replaced. In fact I think I'm just going to cut it off as its distorted enough that it will not come off the nipple. It is about 9" long and has a slight curve in it where it meets the thermostat.

 

Just pulled the thermostat and it looks like its pressed together. Don't trust to repair it.

Rock, could you PM me or e-mail with a price on the thermostat and hose if you have it.

From the owner's site:

THERMOSTAT C/W HOUSING (79): 106393

Small hose about 8" long and 27.5mm ID: 112028

[email protected]

Thanks for all of your help tonight. Good to have friends that care about cars. Good to have friends.

Regards,

Drew

PS: Hey look on the bright side. When I first saw the puddle under the car I popped the rear bonnet and looked down the firewall. My initial thought was the water pump (less than a year since engine out and redone) had given up the ghost.