head gaskets

[Len Sabatine]

   After the fact  Head Gasket distress caused by detonation , great idea to
   true the heads , check valve seating and Block Deck for distortion as 
minimum
   insurance  that the engine won't need to be pulled down again.
   BTW, Detroit Gasket offers Marine - Race head gaskets that are cost
   effective  alternatives to Fel Pro. Factory torque sequence in 30,45,60,70
   with Moly  HB washers and MOS2 lube on head bolt spot face and under 
bolt head
   helps maintain even torque. A Cyl  leak down test is wise to do now as well.
   Hard detonation of the magnitude the engine has incurred has tendency of
   causing Rod B.E. out of round condition and bearing failure. This may not
   manifest itself until a later date. Not cool that the game plays this 
way , often
   it is the case though , unless your'e extra lucky, time will tell.
   Len

>Well, i tore into my engine the other day, some of the center head bolts were
>slightly loose, but #7 was the one that was getting water into it.  When I
>pulled the head, the fel-pro 1010 gasket fire ring had pulled away from the
>material and into the bore on #7, and the #1 looked the same way.  I took it
>to a trusted engine builder, he took one look and said detonation.  I asked
>him if I really needed to retorque and he said not with modern gaskets, just
>racers using copper.  That's a good thing as I am using roller rockers that
>are too wide to allow access to the head bolts without taking them off.   He
>did sell me some felpro 1003 gaskets for way too much.  He said 40-55-70 was
>the torque sequence.  I got home and took the other head off and the gasket
>looked just as bad as the other one, although the bolts were all still tight.
>And nothing was leaking - yet.  I took everything apart, cleaned it all up,
>checked for any grooving in the heads, and put it together.  I suppose I will
>set my valves and reassemble today.
>
>I am going to take edelbrock's advice and re-burn the chip with the factory
>timing and run 8 deg initial.  This is less than I was running and much less
>than the howell chip had before I started messing around.  I drove about
>10,000 miles on a chip with 36 total and more at cruise.  So I guess you can
>all learn now - you can have detonation without knock.  Knock is reeeelly bad
>detonation.  And I'm pretty sure you don't want to experiment with using
>cheap gas and burning a chip for same.  I think that's what did me in more
>than anything.
>
>Thanks for listening to my electroyappin!
>Ryan Hampl - a K-State Grad!    kasaryan at aol.com
>139 Hoover Ct.                  Controls Engineer (tubes rule!)
>Salina, KS  67401               97 B12 / 86 V65 / 93chevy truck EFI 383
>phone  (785) 825 5831           I'M ALWAYS FIRST TO THE GROCERY STORE!
>http://hometown.aol.com/kasaryan/myhomepage/hotspot.html
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