Re: Cam break in is done!....Now more questions!
[Re: JohnRR]
#1493065
12/13/13 01:42 AM
12/13/13 01:42 AM
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Joined: May 2003
Posts: 6,616 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,616
Downtown Roebuck Ont
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I must have missed it as I was going to reply. At any rate instead of spending $200 on .027 Cometics, Mancini has .022 shim gaskets for $32.95 for the pair. It will put your quench at .034 which is bordering on dangerously close but maybe not so dangerous if you keep the RPM reasonable like 5500-5800. If it gets better or makes it go away, you will know you are on the right track and can then decide if the Cometics are worth the $$. If it just makes it go from bad to worse you are only out $32.95 for the education. Kevin
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Re: Cam break in is done!....Now more questions!
[Re: Kern Dog]
#1493067
12/13/13 09:45 AM
12/13/13 09:45 AM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,333
Prospect, PA
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Quote:
Dumb question maybe, but is there enough meat in the chambers to take them out to that cc number? Do they have to cut out the quench pad to get there?
Yes, there is enough meat. They do not cut out the quench portion of the chamber. It does get a little smaller though.
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Re: Cam break in is done!....Now more questions!
[Re: goldmember]
#1493068
12/13/13 12:21 PM
12/13/13 12:21 PM
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Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,274
A gulag near you.
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Alright & if it's good on 89 you might even be able to switch cams if desired. Holler how it turns out. After 5K plus views we're all pulling for ya on this aggravating deal
for me it's like a car wreck ...
I'd consider it a train wreck but wtf do I know.LOL it will be intertaining whatever the outcome.
I was going to say train wreck but I saw a few car wrecks driving from Orlando to Boston last weekend ...
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Re: Cam break in is done!....Now more questions!
[Re: Kern Dog]
#1493070
12/13/13 11:32 PM
12/13/13 11:32 PM
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Joined: May 2003
Posts: 6,616 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,616
Downtown Roebuck Ont
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Quote:
Can those shim gaskets be used with aluminum heads? I have a "fuzzy memory" of reading here that some guys used them with a spritz of copper coat on them?
A Cometic is just a multi layer metal shim style gasket so I would say yes you can use them but I have heard also that the steel can leave a "mark" if you will on the head. A thin coat of Coppercoat would likely help prevent that.
Kevin
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Re: Cam break in is done!....Now more questions!
[Re: Twostick]
#1493071
12/14/13 12:43 AM
12/14/13 12:43 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I had a guy way back on another site state that he could not get his Cometics' to seal until he sprayed all 3 layers with Permatex "high tack" part # 99MA the red stuff in a spray can . I've used it on paper/fiber and composition gaskets with excellent results as it is extremely tacky, goes on light & seals very well. I've used Permatex copper coat spray on steel head gaskets but I did not like the way it went on (too thin/runny). I'm wondering if aluminum (silver?) spray paint would do better (on steel shim gaskets) which has been recommended but I have yet to try it.
live every 24 hour block of time like it's your last day on earth
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Re: Cam break in is done!....Now more questions!
[Re: Twostick]
#1493074
12/17/13 03:45 AM
12/17/13 03:45 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
OP
Striving for excellence
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OP
Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
Cometics require a pretty precise finish on the decks or they can leak.
Kevin
The last set I ran was in 2006. I had the heads lightly surfaced and cleaned the block with a red Scotch Brite. I had no leaks then. Other than the Cometics, I've only used Fel Pro blue gaskets. They leave no chunky residue after removal. I asked my machinist today. He said the decks need to be clean but not mirror/glass smooth. He felt here should be some degree of "grit" to the surface.
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Re: Cam break in is done!....Now more questions!
[Re: JohnRR]
#1493081
01/01/14 11:02 PM
01/01/14 11:02 PM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
OP
Striving for excellence
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OP
Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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Quote:
how many threads of the adjuster are BELOW the rocker arm , I'm ASSuMEing that you used the same pushrods ...
I haven't checked that. The adjusters were set to the old setup when I installed them at first. I had to turn them CW about 1 1/2 turns to tighten up the lash. It looks like about 3-4 threads show above the lock nuts.
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Re: Cam break in is done!....Now more questions!
[Re: Kern Dog]
#1493082
01/01/14 11:05 PM
01/01/14 11:05 PM
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Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,274
A gulag near you.
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Quote:
Quote:
how many threads of the adjuster are BELOW the rocker arm , I'm ASSuMEing that you used the same pushrods ...
I haven't checked that. The adjusters were set to the old setup when I installed them at first. I had to turn them CW about 1 1/2 turns to tighten up the lash. It looks like about 3-4 threads show above the lock nuts.
What is showing above the nuts is not what I asked about sir ... BELOW THE ROCKER ARM
How about taking a picture ?
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