Topic: 750 intake spigot UPDATED 1-3-13

[KRONUS0100]

freakin broke one.the #1 on a 78 F head.  is it just a matter of right socket and heat to get one out?  i got a total junk head i can get 1 out of it if its that easy to remove one.  if anyone got any tips or ideas i would appreciate it.  thanks

[KRONUS0100]

oh yeah.......those suckers require a  37mm socket right?

[70CB750]

Removing those is not recommended.  From what I understand, the thread welds together.

I would try heat and penetrating oil - like aceton ATF mix.

Good luck!

[hondaface75]

is there no worry about warping the head from the heat? Im about to tackle these on my head. Trying to port the intakes but cant reach without removing...

[MRieck]

You need heat like from a MAPP gas tank or big propane. Get it hot. You will probably gall the threads a bit but you can seal the spiogot with teflon paste on the threads. I have done it over a dozen times.

[kmb69]

This is the procedure that has worked best for me. Remember this is aluminum and heat transfers quickly. Also, it appears that Honda has used a high temp glue on the threads to prevent air leaks. Heat the head in an oven to about 300 degrees. I think this minimizes potential warpage that may result from localized heating. Have a large enough piece of plywood ready to put the head on when removed from the oven. The plywood will insulate or minimize the heat transfer from the head. Have a long handle ratchet with proper size socket ready. Use welders gloves or similar to remove the hot head from the oven. Have someone hold the head down firmly on the plywood with the gloves of course. Heat will transfer quickly to the socket and slightly shrink the spigots. It usually takes a firm "pop" or "whack" on the end of the ratchet handle to break the spigots loose. Do this quickly to all 4 spigots while the head is at maximum temperature. Normally, the spigot will screw right out but due to the glue and possible over torquing from original installation, the spigot may start to gall. These are a fairly fine threads and are readily damaged. If when unscrewing the spigot it starts to tighten, STOP! See if it will EASILY screw back in about 1/8 of a turn. If this happens, don't try to force it out. At this point you will need to use a solvent like aerokroyl or similar to wash out the glue and lubricate the threads as much as possible for removal. NO guarantees but this process as I said has worked best for me.

[KRONUS0100]

hmmmmmmmmmmmmm......wifey wont let me put head in oven.    but i do have a nice large propane grill sittin outside.    still trying to locate a 37mm socket cheap.................aint paying 40 bucks for one.

[70CB750]

Harbor Freight? TSC? Or check out spindle sockets at Pep Boys/Autozone.

[HondaMan]

I have also taken the head to a [real good] welder who draws them back on for me. He rebuilds fins for me, too! Costs about $40-$50.

[KRONUS0100]

HONDA Wonder Glue-zero.
Me-1

do not try this when significant other is expected to be home, YOU WILL LAND IN THE DOGHOUSE
for want of a torch and thinking about forever now, I finally heated up the ol gas grill and put my junk 750 head on it.  heated head up to 400 degrees F.
wearing my welding gloves i grabbed the head and set it on a piece of 2x6, put a piece of 2x4 on it under my foot, and spun out all 4 intake spigots without damaging the threads. 
wifey got a little upset with me for cooking the head on the grill.  in my defense, the head was mostly clean when i put it on the grill, not like it was filthy and covered in grime.  I had to use a 1 1/2 inch socket because trying to find a 37mm socket is almost impossible.  a light file will clean up the slight rounding of the corners.   now to put one of them into the head on my 78F motor.

[70CB750]

Congrats!

I actually got away with baking painted parts in the kitchen oven this Christmas 

[iron_worker]

I baked a set of parts once and the gf got a massive headache ... guess I won't be doing that again.

IW