PDA

View Full Version : pinch bolts



dclewallen
09-25-2006, 07:04 PM
I've had new Hypereutectic pistons installed onto my connecting rods. I was looking at them and noticed that one of the pinch bolts [I think thats what there called] is turned backwards [nut is on opposite side] from the other 7. Is this OK?

Darryl C. Lewallen Clarkesville, Ga.

JDP
09-25-2006, 07:53 PM
NO ! it is not, read the shop manual for the correct alighment of the rods ,pistons, and studs. BTW, tap the stud in with a soft hammer when you torque them down.

http://stude.com/sig.jpg
Studebaker On The Net
http://stude.com
Studebaker News Group
http://groups.google.com/group/alt.autos.studebaker
Arnold Md.
65 Sports Sedan(sold)
64 Daytona HT
63 R2 4 speed GT Hawk
63 GT Hawk
63 Avanti R1/AC
63 Avanti R2/4 speed
63 Daytona HT
63 Lark 2 dr.
62 Lark 2 door
62 GT(parts car)
60 Lark convert
60 Hawk
57 Silver Hawk
52 Starliner(sold)
51 Commander
50 Champion (sold)

Alan
10-02-2006, 06:01 PM
DC, That is one of the most critical parts of your engine and the one thing that will distroy it in a hurry. Just ask me and JDP how we know.

PaulDriver
10-03-2006, 05:38 AM
O.K.

'cause I'm hurting to hear a good story I'll bite;

Just how do you know?

rusty nut garage
10-03-2006, 10:35 AM
SHOP MANUAL SHOP MANUAL SHOP MANUAL SHOP MANUAL
Can't be said enough, it'll save you and the next guy $$$$ time and aggrevation. I just tore down a 289, a few of the things found,
crank gear had been installed by beating on it result one half broken tooth, thrus washer behind crank gear installed backwards causing thrust bearing to be destroyed, homemade brass shims to set up end play, crude looked like they were cut with an axe, one laying in the bottom of the timing cover. aluminum timing cover cracked where the same the mechanic his name I think was G.O.rilla beat the front hub on with a sledge. front hub all beat up. Wrong washers on main bolts, factory rods numbered by factory in different positions.
One rod installed backwards.
Just do it right or don't do it!!
Russ

Russ Shop Foreman "Rusty Nut Garage"
57 SH (project)
60 Lark VIII 2dr sd (driver)

Alan
10-03-2006, 05:12 PM
Paul, Back about 68 or 69 I was running a 232 at Fernando Raceway. One Sunday at the strip about half way down the quarter the car started smoking out of one pipe. Checked out to be a broken ring. Removed the piston and rod assembly, the piston was scratched from pieces of the ring. So I bought a new piston from Jahns. In a big hurry to get it running for the next Sunday didn't take my time to put that pin in right, I guess, because about 2 or 3 months later on a pass just before the finish line the engine shut off like you turned off the key. That last rod assy. the nut fell off and the pin backed out and jammed against the cylinder wall. Twisting and breaking 1 rod, the crank in one place. The cam came out in 3 pieces. The oil pan looked like someone had put a grenade in it, the block was cracked. About the only things I could use on another engine were the valve keepers.

John Kirchhoff
10-03-2006, 10:43 PM
Russ, you gotta give Mr. G.O. Rilla (Ha!, love it!) credit for being so creative in screwing up the job in so many different ways. Talk about original thinking!