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CVO Technical => EVO => Topic started by: billywolf067 on August 19, 2015, 01:02:45 PM

Title: Blown head gasket
Post by: billywolf067 on August 19, 2015, 01:02:45 PM

I have recently rebuilt my 80 cubic inch evo. I have a 94 dyna low rider  i put arp head bolts an new studs an used james gaskets. I got a rear head gasket leak so i tore the rear head and jug off put new gaskets on and as soon as i started the bike the gasket blew again. Any suggestions would be very helpful and appreciated

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Title: Re: Blown head gasket
Post by: johnsachs on August 19, 2015, 06:55:30 PM

Several common possibilities. :nixweiss:
Stud pulling.
Head gasket surface, (cylinder or head) not flat. Wrong or improper torque procedure.
John

Title: Re: Blown head gasket
Post by: billywolf067 on August 19, 2015, 07:30:44 PM

Thanks

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Title: Re: Blown head gasket
Post by: johnsachs on August 20, 2015, 08:46:28 AM

Also, if using a MLS style head gasket, you  DO NOT  use the O-rings on the cylinder dowels.
John

Title: Re: Blown head gasket
Post by: HILLSIDECYCLE.COM on August 31, 2015, 06:37:52 AM

With all the engines we build here, I can count on 1 hand the number of times we have used a replacement cylinder head stud.
ARP hardware is top-shelf no doubt.
We use Cometic head gaskets here.
Scott