mr.belvedere
Well-Known Member
- Local time
- 12:43 PM
- Joined
- Jul 20, 2008
- Messages
- 214
- Reaction score
- 68
- Location
- eagle mills, new york
Hey guys. Anyone have a 440 block on the shelf they could give me some head bolt hole depths on? Bolting on some new 440Source stealth heads today, and 3 or 4 of the short head bolts have actually stretched on me before they reached the instructed torque of 70 lb.ft. I'm using 30 weight oil, and 3 step torquing procedure as instructed by 440source. Even using their 12 point head bolt set. Stopped when I thought I was pulling the threads out of the block. Holes were thread chased and cleaned before assembly. Super pissed. Everything brand new and clean. WTF? Read maybe I used too much oil on the bolt head/washer? some say to scuff one side of the washer with 60 or 80 grit emery for some bite? This is a friends motor, but this will be on my dime. Another set of bolts and gaskets already ordered, just dont want to go thru this again. Budget is tight on this car. Put together 3 other B/RB engines in the past. Nothing like this before, but this is the 1st set of aluminum heads I've installed. Not an idiot, just missing something. Any help or advice is greatly appreciated. Thanks guys.