Where Coolant Hose Meets Cylinder Head

[joelittel]

Can this metal hose insert piece be replaced? If so does anyone know what it's called and who sells them?

[vandor]

I've never seen them new and have not known anybody able to remove one.
If you had a replacement I suppose you could drill it out or have a machine shop do it.

[joelittel]

Ok thanks.

[131]

http://turbo124.com/forum/viewtopic.php?f=29&t=12298

[joelittel]

That's a site I had not come across yet. Thank you.

[weekend warrior]

I've done a few of these in stainless as in Micks previous post, can ship statewide. Would post an image but it was easier and quicker to machine stainless !!

[divace73]

Here you go WW





That is a nice bit of gear

[joelittel]

Weekend warrior what do you charge?

[weekend warrior]

Thanks Dave

Machined these from 316 marine grade stainless 7/8" hex bar ( so you can easily install/remove )

$60 aus or $55 us + shipping

[bradartigue]

Can you machine it to be about 4" taller so you can use a more common, molded U hose?

[weekend warrior]

Can you machine it to be about 4" taller so you can use a more common, molded U hose?

I could but the extra cost would probably outweigh the difference between the rubber hoses

[bdinardo]

Hoping to revive this thread as that metal pipe is a bit more corroded on my 1979 than I would like. I'd like to replace it but the links in the thread above don't work any more. Has anyone been able to find a place to buy a replacement pipe? Thank you!

[Spider951]

I see that you have received no answers. I don't have one either, but I can tell you from my efforts to remove/replace that little piece of pipe that it is really, really in there. IIRC it is steel threaded into aluminum (so probably a galvanic action thing going on). I have tried on two different cylinder heads with no success - on one I applied so much torque using a pipe wrench (plumbers type) and "cheater" bar (about 4 ft of pipe on end of pipe wrench) that I feared I would shear the thing off (wouldn't budge - I only succeeded in deforming it). I also wondered whether it is reverse threaded but doesn't appear to be. Maybe some application of heat, or drilling it out, or welding a piece over it or inside might work, but I decided to give it up for the time being and just tried to remove as much corrosion as possible for now.

[18Fiatsandcounting]

As least for the earlier spiders, the part number of this fitting is 4151673. I'm not aware of anyone that sells them, so you'd either have to find a good used one, have a machine shop make one, or maybe you can search online for "metric taper pipe fitting" and find something that would work. A metric taper hose barb of the right size would probably work.

To remove the fitting, heat is probably the answer. Like from a propane torch to get it pretty hot. Let if cool down, and remove with a pipe wrench. I'm thinking it would be much easier if the cylinder head were removed and on a workbench.

To be honest, unless this pipe is so corroded that you can't get a leak-free connection, I'd just leave it alone. It's just one of those unfortunate fixes that sometimes takes more effort than it's worth.

-Bryan

[Spider951]

Aluminum, steel, and water (and time) all in contact with each other is a recipe for a galvanic cell, hence corrosion between two dissimilar metals and the possibility of a type of "welding". Whew.... that's all I remember from college chemistry (even with Father Guido Sarducci's 5-minute university refresher course [Saturday Night Live, early 1980's(?), for you young folks]). I would urge caution with whatever you do (I could have had a Homer Simpson "Doh" moment had I continued with my strong-arm tactic with my big cheater bar for more torque). That aluminum cylinder head is a lot more expensive than a 3-4 inch piece of steel. I don't think the corrosion can be undone? (any chemists out there?). In one of my former lives my oil-field roughneck friends would have said "use a bigger hammer", but they dealt with strong thick metals (serious steel). I would like to know what experience teaches us on removing this little threaded steel tube troublemaker. Surely someone has tackled this..??