spider in-head thermostat gooseneck WANTED

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friedman
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spider in-head thermostat gooseneck WANTED

Post by friedman » Tue Dec 25, 2018 3:54 pm

This is the housing that bolts to the head with a single, forward pointing hose spigot when using the in-head thermostat.
I want one.
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Re: spider in-head thermostat gooseneck WANTED

Post by zonker » Tue Dec 25, 2018 6:44 pm

I found one a couple months back from ebay user britishanditaliancarparts . He doesn't have any currently listed but I bet he still has one in his parts stash. Hope that helps.
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Re: spider in-head thermostat gooseneck WANTED

Post by rridge » Wed Dec 26, 2018 7:59 am

So, like the lower the two coolant outlet castings in the attached picture. I believe that there are two single-outlet casting variants. The primary difference is the diameter of the bolt holes.
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Comparison of Coolant Outlets Castings (3).jpg
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Re: spider in-head thermostat gooseneck WANTED

Post by bnam2 » Wed Dec 26, 2018 10:23 am

There may be more castings. I have one that has m6 mounting bolts with a flanged outlet.
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Re: spider in-head thermostat gooseneck WANTED

Post by SimcaBertone66 » Wed Dec 26, 2018 10:59 am

Carl, If you need one right away, I can long term" lend" you this one , which I made, (this is were Carl interjects, "you have too much time on your hands" ) came off the spare race motor
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You can give itback if you find a nice "factory" one
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Re: spider in-head thermostat gooseneck WANTED

Post by friedman » Wed Dec 26, 2018 1:22 pm

Thanks, JD but I'm in no rush, pulled the motor today and don't see it going back in (rebuilt) until the spring at the very earliest. I have a line on one local.
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Re: spider in-head thermostat gooseneck WANTED

Post by jseabolt » Sun Jan 13, 2019 8:53 am

Any reason you couldn't just cap off the port going to the external thermostat using a 1.5" rubber hose cap like this? I realize it doesn't look as nice as the one hose outlet port.

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Re: spider in-head thermostat gooseneck WANTED

Post by friedman » Sun Jan 13, 2019 1:17 pm

No functional reason not to use a modified external thermostat gooseneck, just esthetics.
If I could not find one I would go that route or better yet have one welded up to close that outlet.
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Re: spider in-head thermostat gooseneck WANTED

Post by rridge » Sun Jan 13, 2019 1:39 pm

James wrote:
Any reason you couldn't just cap off the port going to the external thermostat
then Carl wrote:
No functional reason not to use a modified external thermostat gooseneck, just esthetics
I'm snowed in today so let me spell out once again the functional reason for using the factory single hose outlet rather than the home garage modification of the two-hose outlet. When you run an in-head thermostat, the flange of the thermostat takes up a portion of the mounting hole depth in the head. The flange on the base of the coolant outlet casting sits over it. The two-hose outlet has a deeper mounting flange. When you set it on top of an in-head stat, the deeper flange holds the base of the casting off the head.

Many owners fudge the fit of the 2-hose casting over the thermostat by skipping the gasket and applying RTV. Doing so invites a leak.
If you get a leak at that joint, you will get corrosion in the outlet casting and the head itself, not to mention the on four steel mounting bolts threaded into an aluminum head. You can see the corrosion starting on the upper casting in the attached picture.

But by the time you go to the trouble of modifying the 2-hose outlet tee to take a single hose and deal with the sealing issue on the head you might be able to find the factory single-hose piece, as Carl has just demonstrated. I think I paid about $25 for one some years ago. They are not available every day. But who needs a single outlet casting an urgent basis?
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Comparison of Coolant Outlets Castings (4).jpg
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Re: spider in-head thermostat gooseneck WANTED

Post by friedman » Mon Jan 14, 2019 8:59 am

Richard, doesn't everyone have a lathe in their garage and can cut down that flange?
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