Camshaft failure - Page 4

Adger Smith · 06-19-2009, 08:25 PM

Ok.
On the subject of the roller cam engine break in. I always use a heavy single grade oil that has zinc in it. Think of it this way::: Roller cam rollers need to roll, not skid on the cam.you still need oil that has a good EP rating or the load on the rollers to cam goes metal to metal. What does the Zinc do for this case? Think of it in the same light as what lead used to do for gasoline.
It helps build up compatable wear surfaces. I can tell the difference in an engine raced on pump gas and one that is run on race gas only. (most race gas still has lead) The guides, valves, seats pistons cylinder walls and rings are all areas that develop compatable wear surfaces when using leaded gas. Zinc is for oil what lead is for gas.
Also, Do your self a favor & stay away from any synthetics for break in. I have seen it with blow by meter on the dyno. The rings have a hard time sealing, IF they seat. .
Has anyone had the sludge analized? Could it be the moly in the oil falling out against the cool surface of the bottom of the pan?

skipper latino · 06-22-2009, 03:22 PM

Polydyn .com tx7 the best!!!

trmnatr · 06-22-2009, 03:24 PM

I have had no issues out of Valvoline VR1 and Valvoline NSL oils

06-19-2009, 08:25 PM	#31
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Camshaft failure Ok. On the subject of the roller cam engine break in. I always use a heavy single grade oil that has zinc in it. Think of it this way::: Roller cam rollers need to roll, not skid on the cam.you still need oil that has a good EP rating or the load on the rollers to cam goes metal to metal. What does the Zinc do for this case? Think of it in the same light as what lead used to do for gasoline. It helps build up compatable wear surfaces. I can tell the difference in an engine raced on pump gas and one that is run on race gas only. (most race gas still has lead) The guides, valves, seats pistons cylinder walls and rings are all areas that develop compatable wear surfaces when using leaded gas. Zinc is for oil what lead is for gas. Also, Do your self a favor & stay away from any synthetics for break in. I have seen it with blow by meter on the dyno. The rings have a hard time sealing, IF they seat. . Has anyone had the sludge analized? Could it be the moly in the oil falling out against the cool surface of the bottom of the pan? __________________ Adger Smith (Former SS)

06-22-2009, 03:22 PM	#32
skipper latino Junior Member Join Date: Dec 2008 Location: Donaldsonville La. Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: Camshaft failure Polydyn .com tx7 the best!!!

06-22-2009, 03:24 PM	#33
trmnatr Member Join Date: Oct 2008 Posts: 168 Likes: 0 Liked 1 Time in 1 Post	Re: Camshaft failure I have had no issues out of Valvoline VR1 and Valvoline NSL oils