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Old 03-30-2009, 12:00 PM   #21
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Going outside now to do some tests and drop the motor....Hopefully its not too bad and I can patch 'er up quick. Robert, be prepared for a call for labor....LOL
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Old 03-30-2009, 03:12 PM   #22
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I sent you a text earlier. I was thinking bout riding over. I figured you were gonna pull it today. I had to make some runs down Redbluff to test the shifter.
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Old 03-30-2009, 07:25 PM   #23
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I could help tomorrow after work Im pretty sure.
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Old 03-30-2009, 07:39 PM   #24
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..
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Old 03-30-2009, 07:54 PM   #25
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. I really did want to help fugger. Glad to hear its not bad.
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Old 03-30-2009, 08:12 PM   #26
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Old 03-30-2009, 08:50 PM   #27
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Congrats on your runs Alan, a little head gasket never hurt anyone...

I think you can update that thread since you are the fastest on the site now Mr. 225...
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Old 03-30-2009, 09:15 PM   #28
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Quote:
Originally Posted by Badzx14r View Post
floated the head is what i think i can see from the pics also .. looks likes some carbon blown between the cylinders .. don't look like you used any copper coat or yama bond type stuff on the gasket or surfaces ...



looking at the head the #1 intake valves look funny from the rest i don't know if its pic angle
NAW...the black spots on the block between the cylinders is the black coating that stuck from the Cometic head gasket, not carbon. Cometic recommends installing the gasket dry. BUT I do think you are right about lifting the head. Jury is still out on this. The loss of 10-15psi on each cylinder is weird, especially considering the valves are sealed up so well in the head.

The funny look of the valves/chambers I believe is due to running C16 a lot, it leaves a greenish/yellow residue everywhere, the plugs had it also. I will probably pull the head apart, re-lap the valves in after I have it surfaced.
Also thinking I will probably change the rings since I am in there. Thats another $125.
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Old 03-30-2009, 09:37 PM   #29
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Old 03-30-2009, 09:42 PM   #30
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With good studs and nuts U wouldnt think the head would lift, those cometic gaskets are purdy good, what boost were U running when this happened? torque on nuth high enough? can U oring to correct this?, just some thoughts, glad its nothing major for sure, thats tough on the wallet, and I know U just went thru this too, that is the main reason why I havent dont this, I,m wanting to build a new top gas bike.
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Old 03-30-2009, 09:45 PM   #31
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Old 03-31-2009, 07:53 AM   #32
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Good News

Thats good news... Rember, I live 15 mins from you... When you get ready to stab it let me know. And, I will help.
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Old 03-31-2009, 08:47 AM   #33
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Quote:
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if your leaking between cylinders it can easily lose 10 to 15 lbs of compression ... once it leaks between them the gasket or the seal is broken ..and thats why i think you have a 2 black coating spots and a clean spot in between cylinders of where it blow the black coating from the head gasket off ..


but thats just what i think


i would have retorque the head and then did a compression test before breaking engine down ...
Man I am hoping you are right. I did check the torque on the studs, I backed my torque wrench off to 50 ft lbs and went through all of them and a couple budged at 50, then I did it at 55lbs and a couple budged at 55lbs, then at 60lbs a couple budged.....Originally they were torqued to 65 ft lbs. Not sure if the studs stretched or the gasket or whatever but.... Either way, I am gonna clean it all up, put it back together after I surface the head/cylinder, I might slap a new set of rings in it just since I am in there and know there was compression issues. Honestly, I don't think anything is wrong in there, I think the head lifted and boost pressured up the cooling system, it shouldn't have happened, especially at only 18lbs of boost but...

I will triple check everything this time. Also gonna slap in a new clutch pack and fix a couple other little things. It never ends.
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Old 03-31-2009, 11:10 AM   #34
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if you ever get tired of spending money on your's, I only live a couple miles down the road
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Old 03-31-2009, 01:17 PM   #35
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Quote:
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if you ever get tired of spending money on your's, I only live a couple miles down the road

Oh I've BEEN tired of spending money on this thing believe me..... I am gonna patch it up this time relatively cheap and then I am just gonna ride it for a while without seriously racing it. I am gonna fix a few things that have bothered me since the last build. Tweak a few things, should take a couple weeks to get it back together.

I tell you what, it was flying pretty good in 5th with 18lbs boost going into it.....that was about 350-360hp before the head gasket let go in 6th at 10k.
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Old 03-31-2009, 01:26 PM   #36
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Now get the links for the old school and lets do some draggin
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Old 03-31-2009, 08:05 PM   #37
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Well, today while cleaning the head and lapping the valves, I came across this little gem..... Its hard to see in the pic but its a crack between the intake and exhaust valve. I am not sure if this happened this weekend or a while back. When I blew the motor the first time, this head had two other cracks like this that I had welded up and machined,(this one is new though) maybe this head was just too fatigued but....either way, the search begins for a new head. This definetly put my project on the back burner.

Alan's Texas Mile update
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Old 03-31-2009, 08:08 PM   #38
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Man, that sucks!!! Hope you enjoyed the mile though!!! I'm wanting to go
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Old 03-31-2009, 08:16 PM   #39
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Alan,
Sorry to hear about the motor, but good to hear your had a relatively good run.
I'd go back with APE studs and nuts with a Cometic gasket and Gasgacinch.
Run the motor up to temp and then retorque the head.

Give me a shout if you need anything.

BTW, how did the front end feel?
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Old 03-31-2009, 09:23 PM   #40
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What about an aftermarket head? Vortex? and/or Mtc block?
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