question on head

87supraturbo19

pearl white
Jan 16, 2006
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Springfield,MO
do you guys that have arp studs have to take the big vaccum bolt on the back of the head out to get the head off? Does anybody happen to know what size it is? man it really sucks you have to lift the head up so high with studs.
 

NJsupraA70

Ex-Supra Owner
Sep 18, 2005
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NJ
87supraturbo19 said:
do you guys that have arp studs have to take the big vaccum bolt on the back of the head out to get the head off? Does anybody happen to know what size it is? man it really sucks you have to lift the head up so high with studs.


Its a water line, not vacuum. Its fairly large, bigger than 24mm I believe, sorry but I cant remember off the top of my head the what it is.
 

lagged

1991 1JZ
Mar 30, 2005
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new rochelle
i hope you have the studs with the hex heads in them, cause youre gonna have a tough time getting the head out of there without removing the head studs.
 

Stretch

Tallest MK3 driver ever!!
Mar 30, 2005
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Toronto, Ontario
I just went out and checked for ya. It's a 1 1/4 inch socket, friggin huge. Weights about 1-2 pounds, but fits super well over the rear union bolt as it's called.
eric
 

87supraturbo19

pearl white
Jan 16, 2006
360
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Springfield,MO
thanks man. i just got home from work with my calipers to measure it but i guess i dont have too. as fars as the hex head, no, i had to grind a small amount off my fire wall lip. but it looks fine cant even hardly tell its there and it makes it alot easier. but its still a bitch.
 

Stretch

Tallest MK3 driver ever!!
Mar 30, 2005
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Are you using a breaker bar? I did, the extra torquing power you get from a longer bar really helps with this situation.
eric
 

87supraturbo19

pearl white
Jan 16, 2006
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Springfield,MO
a breaker bar wont clear the fire wall (iam using a deepwell socket i dont think a normal will clear the neck) unless you know something i dont. i am trying to use a chain wrench around the socket, but it keeps slipping.
 

Stretch

Tallest MK3 driver ever!!
Mar 30, 2005
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I'm terribly sorry, I thought you had the head off the block already. I assume you are changing the hg right? Since you said you got the hg in. I would reccomend doing this union removal with the head out of the engine bay, it'll be about a billion times easier.
eric
 

IJ.

Grumpy Old Man
Mar 30, 2005
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I come from a land down under
Be careful they're really easy to shear off as the fitting has holes drilled at right angles in it to allow coolant flow.

If you unbolt the tranny mount you can jack up the trans enough to tilt the motor enough so the head will clear the firewall.
 

IJ.

Grumpy Old Man
Mar 30, 2005
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Been installed upside down or a really old set?
(try my suggestion with the trans mount and a jack)

The motor will pivot on the front mounts and hopefully give you enough room to slide the head up over the studs.
 

87supraturbo19

pearl white
Jan 16, 2006
360
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Springfield,MO
i dont hardly think we installed them upside down but who knows. i am gonna go with there older. thanks for the suggestion IJ but i dont understand how that will lower the block for it to clear, iam not quesioning you, i just dont understand.