The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Blueprint Engines 383

geezer#99 · 02-15-2011, 06:58 PM

Curious if your heads have been ported. I knew of a similiar problem. The heads had a port and polish job. The guy porting the heads got a little close to the water jacket. No crack just a pinhole that only showed up when the motor was fully warmed up. A pressure test showed nothing wrong. A sonic test revealed the bad porting job.
Check it out. A possibility!!

02-15-2011, 06:58 PM	#7
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,512	Re: Blueprint Engines 383 - My Bad Experience Curious if your heads have been ported. I knew of a similiar problem. The heads had a port and polish job. The guy porting the heads got a little close to the water jacket. No crack just a pinhole that only showed up when the motor was fully warmed up. A pressure test showed nothing wrong. A sonic test revealed the bad porting job. Check it out. A possibility!!