HELP INSTALLING THE CRANKSHAFT 406ci
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Joined: Jul 2006
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From: chiefland fl
HELP INSTALLING THE CRANKSHAFT 406ci
Hey guys, getting ready to set the crank in my 406ci. I just read an article in the new chevy high performance mag that said, just use 30 wt mineral oil (not synthetic) on the crank journals, i thought we used to use like engine assy lube? maybe thicker oil will give false torque readings? i just dont feel too good about just using 30wt to assemble a crank, since im not sure when she will be up and running!!
everyone can weigh in on this one! thanks, BB
everyone can weigh in on this one! thanks, BB
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
The wrong lubricant on the bearings won't affect the torque readings. It is not recommended to break in a new engine on synthetic oil. I prefer assembly lube, but a good heavy oil, that won't run off quickly, is fine if you will be starting the engine soon after assembly. Use an assembly lube if the engine is likely to sit before running.
RACE ON!!!
RACE ON!!!
Race Director
Joined: Feb 2004
Posts: 12,518
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Before installing the bearing shells in the block or the caps,
I always check them carefully for burrs, wipe them clean with laquer thinner, then blow them with air to be sure there is absolutely nothing that can prevent them from seating properly. If stock bolts, I lube them with 10-40 motor oil and torque them. I leave the rear main for last to set the thrust.
If arp bolts or studs, I use the arp moly lube.
I always check them carefully for burrs, wipe them clean with laquer thinner, then blow them with air to be sure there is absolutely nothing that can prevent them from seating properly. If stock bolts, I lube them with 10-40 motor oil and torque them. I leave the rear main for last to set the thrust.
If arp bolts or studs, I use the arp moly lube.
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Cleanliness is next to Godliness. Isnt that the saying?
For assembly I like to use lucas oil stabilizer. Its thick as snot!! Be sure you plastigauge the bearings first. We check ours with a bore mike (inside bearing dia.) and then mike the crank journals. We then double check that by plastigauge.
Also a real good tip is make sure you prime the oil system BEFORE you take it off the stand. That way it has pressure as soon as it starts, and it also is easier if you have a leak.
For assembly I like to use lucas oil stabilizer. Its thick as snot!! Be sure you plastigauge the bearings first. We check ours with a bore mike (inside bearing dia.) and then mike the crank journals. We then double check that by plastigauge.
Also a real good tip is make sure you prime the oil system BEFORE you take it off the stand. That way it has pressure as soon as it starts, and it also is easier if you have a leak.
