Head Gasket Anger

  • zukdave
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Re: Head Gasket Anger

16 Jun 2013 09:45
#592519
Don't forget new o-ring's
1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.

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  • Powerstroke_fan
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Re: Head Gasket Anger

16 Jun 2013 11:03
#592526
Dont feel bad. I just built my motor and got it all together and my base gasket leaks like a mofo. I got it pull it off and try to find a fiber base gasket instead of a copper base gasket.
1977 KZ 1000 work in progress

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  • baldy110
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Re: Head Gasket Anger

16 Jun 2013 11:47
#592527
I don't know what bike your working on but if it is a 1000 cc engine be very CAREFULL when removing the head. You can disturb the base gasket and not know it then when you put it back together you get an oil leak at the base.

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  • gpz1170
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Re: Head Gasket Anger

16 Jun 2013 15:21
#592557
Powerstroke_fan

Do you put the copper base on dry. I always use Gasket Synch, both sides, have never had one (can't remember any) leak.

don
1974 Z1
1976 KZ900
1978 KZ1000
1981 KZ1000
1983 GPZ1100

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  • APE Jay
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Re: Head Gasket Anger

17 Jun 2013 00:57
#592639
Do Not Surface the head if it is warped!!!!

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  • steell
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Re: Head Gasket Anger

17 Jun 2013 01:07
#592642
APE Jay wrote: Do Not Surface the head if it is warped!!!!

Please expound kind sir :)
KD9JUR

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  • Old Man Rock
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Re: Head Gasket Anger

17 Jun 2013 08:37 - 17 Jun 2013 15:50
#592666
Did you use original or new one piece with rubber O-ring...?

BTW, try not to get get angry with her for she's 30 years old after all, just part of life building these old beauties back to their previous magnificent glory... B)
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
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Phoenix, Az
Last edit: 17 Jun 2013 15:50 by Old Man Rock.

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  • murr50
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Re: Head Gasket Anger

17 Jun 2013 13:54
#592715
It was a new gasket, and I used the two rubber o-rings at each side.
Old Man Rock wrote: Did you use original or new one piece (Gasket maker in the O-ring groove) or two piece head gasket with rubber O-ring...?

BTW, try not to get get angry with her for she's 30 years old after all, just part of life building these old beauties back to their previous magnificent glory... B)

It was a new gasket, and I used the two rubber o-rings at each side.
1977 kz650 C

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  • APE Jay
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Re: Head Gasket Anger

17 Jun 2013 15:36 - 17 Jun 2013 15:45
#592727
steell wrote:
APE Jay wrote: Do Not Surface the head if it is warped!!!!

Please expound kind sir :)

The way these overhead cam cylinder heads are made is from the flat head surface, the cam journals are line bored.

If you remove the head, and it has a warp or bow in it, so does the cam bores. Most I have seen that had slight bow, when reinstalled with good studs, pulls the bow out and the cam bores are straight once again.

We have had cases where the head had signaficant bow, and we put it in the press and bent it back close enough that the studs could handle the rest.

If however, you have the head off the motor and it is bowed or warped, and you surface it flat, the cam bores are now perminately screwed.

We do surface heads, to remove imprefections, raise compression, etc, but never to remove bow or warp.
Last edit: 17 Jun 2013 15:45 by APE Jay.

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  • bountyhunter
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Re: Head Gasket Anger

17 Jun 2013 16:50
#592733
steell wrote: You can not put RTV on a head gasket and expect it to seal.

Yes, you need a new gasket, and don't use anything on it.

+1 never use RTV on a head gasket. There is some spray on copper adhesive specifically made for head gaskets, but you should not need it with a new gasket if the metal surfaces have been properly cleaned.

Make sure and clean the RTV off completely.
1979 KZ-750 Twin

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  • bountyhunter
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Re: Head Gasket Anger

17 Jun 2013 16:53
#592735
Powerstroke_fan wrote: Dont feel bad. I just built my motor and got it all together and my base gasket leaks like a mofo.
My 750 twin came from the factory with very strong sealer on the base gasket. Unbeleivably hard to get the cylinder off, the gasket stayed sealed to both surfaces and tore in half when it separated. I guess they didn't want it to leak.....
1979 KZ-750 Twin

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  • Dr. Gamma
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Re: Head Gasket Anger

17 Jun 2013 20:00 - 17 Jun 2013 20:01
#592767
APE Jay wrote:
steell wrote:
APE Jay wrote: Do Not Surface the head if it is warped!!!!

Please expound kind sir :)

The way these overhead cam cylinder heads are made is from the flat head surface, the cam journals are line bored.

If you remove the head, and it has a warp or bow in it, so does the cam bores. Most I have seen that had slight bow, when reinstalled with good studs, pulls the bow out and the cam bores are straight once again.

We have had cases where the head had signaficant bow, and we put it in the press and bent it back close enough that the studs could handle the rest.

If however, you have the head off the motor and it is bowed or warped, and you surface it flat, the cam bores are now perminately screwed.

We do surface heads, to remove imprefections, raise compression, etc, but never to remove bow or warp.




I would be curious what a "signaficant bow" is? 2 thousands across the whole head gasket surface??
4 thousnads??

Do you mount the head in some type of fixture to bend it back close?? Are you using hydraulic pressure of some sort to bend it back?

Are you heating the head up before you attempt this??

You have sparked my curiosity on this one!!! Makes a bunch of sense on what you said about the cam journal alignment though.
1972 H2 750 Cafe Racer built in 1974.
1976 KH400 Production Road Racer.
1979 Kz1000 MK. II Old AMA/WERA Superbike.
1986 RG500G 2 stroke terror.
1986 GSXR750RG The one with the clutch that rattles!

Up in the hills near Prescott, Az.
Last edit: 17 Jun 2013 20:01 by Dr. Gamma.

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