ZX12-5807
Expert Class
Posts: 137
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posted February 20, 2012 03:52 AM
Head Gasket Blowing Between Cylinders
I have a 2001 ZX12 with a SBM Billet 1317cc block that is blowing the head gasket (MLS Cometic ) between all the cylinders. The motor has the APE studs installed and I torque them to 65 ft. lbs. I know there are a few guys out there that have had this same problem. I am in need of some suggestions to fix this issue.
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
  
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supra5677
Pro
Posts: 1279
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posted February 20, 2012 07:57 AM
Is 65 foot pounds enough? I had that problem on my Toyota supra turbo. The fix was torqing head gasket 10 more pounds..
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Shane661
Needs a life
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posted February 20, 2012 02:58 PM
Have you resurfaced the head and block?
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supra5677
Pro
Posts: 1279
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posted February 20, 2012 04:26 PM
Good question Shane...
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ZX12-5807
Expert Class
Posts: 137
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posted February 20, 2012 10:29 PM
Supra - I was going by what was recommended by APE. I might try torquing them a little tighter but I don't want to go anymore than 80 ft. lbs.
Shane - I did not send them to a machine shop for resurfacing but I did lap the two of them together using a light valve grinding compound.
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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Shane661
Needs a life
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posted February 21, 2012 07:42 AM
If you call Jim Gilnack at Competition CNC, he can help you with this.
They do resurfacing, and have some special lapping tools as well.
http://www.competitioncnc.com
Shane
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ZX12-5807
Expert Class
Posts: 137
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posted February 21, 2012 08:07 PM
Thanks I will give Jim a call.
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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ZX12-5807
Expert Class
Posts: 137
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posted February 22, 2012 08:20 PM
I talked to Jim at Competion CNC today and he says that the block probably needs to be resurfaced and getting it machined for Orings would be good to. I also talked with Superbike Mike, he said most of those blocks were machined for orings and he could get it done for me with about a two week turn around time. So do I just have it resurfaced or go ahead and get it machined for orings?
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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Paul2281
Expert Class
Posts: 147
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posted February 23, 2012 05:50 AM
Some have run o`rings top and bottom...Head machined for o`rings too....You will find it hard to blow head gaskets with this setup....
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KZScott
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high on speed
Posts: 7235
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posted February 23, 2012 07:04 AM
o rings on either side of the gasket? uhhh....?
the setup I will be running with my billet Muzzy block is this: block machined for o rings, o rings installed in block, (annealed) copper HG with some sealer for the water/oil and reciever groove in the head (which doesnt have o rings!) the idea here is the wire deforms the copper and pushes it up into the groove in the head creating a mechanical lock.
not to scale but you get the idea
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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Paul2281
Expert Class
Posts: 147
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posted February 24, 2012 08:02 AM
Pretty sure Dean had to do his ZRX nitrous or turbo motor like that...He kept blowing head gaskets even with just one side o-ring`d...
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ZX12-5807
Expert Class
Posts: 137
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posted February 27, 2012 10:35 PM
I decided to send the cylinder and head to Lee's Performance. The cylinder will be resurfaced and head will get oringed. He says he can have it done in two weeks which will leave me just enough time to get it all back together for race season.
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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aliveagain
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Posts: 5033
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posted March 18, 2012 06:05 PM
I have a SBM billet big block I'll get rid of.
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I wondered why the baseball kept getting bigger. Then it hit me.
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ZX12-5807
Expert Class
Posts: 137
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posted March 18, 2012 11:07 PM
aliveagain - I don't need another one. What did you do to finally get your headgasket to seal with the SBM block?
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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aliveagain
Needs a life
Posts: 5033
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posted March 19, 2012 02:40 AM
My problem was I was running around town with higher than stock compression and not keeping the rpm's up. On the street, I ride close to the speed limit and this would cause det. I didn't have a problem with it until the comp went up.
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I wondered why the baseball kept getting bigger. Then it hit me.
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ZX12-5807
Expert Class
Posts: 137
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posted March 20, 2012 03:39 AM
How much compression were you running?
I had some detonating issues on mine also. I was running 13.5 compression on mine. I am still going to run high compression but i will be using high octane race fuel only from now on.
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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aliveagain
Needs a life
Posts: 5033
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posted March 20, 2012 08:24 AM
I was around 14.8/1 I believe and that was running 93 octane.
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I wondered why the baseball kept getting bigger. Then it hit me.
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