C60 truck 292 valve lash specs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Captain Underdog · 05-24-2010, 01:02 AM

I scored an actual "truck" motor and put it in my son's 65 C20. The motor is a 1966 and I believe it has solid lifters. I guessed and set the valves at .015 and it runs fine with some clicking. I cannot tighten the rockers any tighter than zero lash while running, it never recovers like a hyd motor would, it just misses. My question is this; was my guess right, or even close? What is the spec supposed to be on setting the valve lash for this motor?

cdowns · 05-24-2010, 05:51 AM

i believe it should b .005 intake .015exhaust from what i see solid lifters in an older book i have

**slomotion** · 05-24-2010, 11:01 AM

I'm suspicious of solid lifters in a '66 292. I understand what you're saying about the stumble when you go to "0" lash, but I think I'd pull the forward side cover and visually confirm the lifter type.
JMHO

Wrenchbender Ret · 05-24-2010, 06:42 PM

All 292's had hyd. lifters. It should have them unless someone has changed them over which is highly unlikely. They probably needed adjustment for a long time & are stuck in the top position. Maybe an additive in the oil & turn them down one at a time & see if it will stop missing after a minute or so. I would pull a cover like the guys said & take a look at them.

Captain Underdog · 05-25-2010, 12:05 AM

yeah, this thing sat in the warehouse for eight years. Turns over freely, I surely wouldn't think the lifters would freeze before the cylinders. I got lotsa books and couldn't ever find a spec on 292 solids. I'm gonna pull the side cover and look. If they are solids, somebody other than Chevrolet did it.

Thanks for all the responses.

05-24-2010, 01:02 AM	#1
Captain Underdog Registered User Join Date: Jun 2009 Location: Idaho Territory Posts: 32	C60 truck 292 valve lash specs I scored an actual "truck" motor and put it in my son's 65 C20. The motor is a 1966 and I believe it has solid lifters. I guessed and set the valves at .015 and it runs fine with some clicking. I cannot tighten the rockers any tighter than zero lash while running, it never recovers like a hyd motor would, it just misses. My question is this; was my guess right, or even close? What is the spec supposed to be on setting the valve lash for this motor? __________________ "..not ashamed of the gospel" Rom. 1:16 1968 C10 (newly acquired) 1967 Checker Marathon (waiting for paint) 1968 C50 Service Truck (resting in peace for now) I need another project like I need another hole in my head!!!

05-24-2010, 05:51 AM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: C60 truck 292 valve lash specs i believe it should b .005 intake .015exhaust from what i see solid lifters in an older book i have __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

05-24-2010, 11:01 AM	#3
slomotion Old Duffer Join Date: Mar 2003 Location: Maine Posts: 1,822	Re: C60 truck 292 valve lash specs I'm suspicious of solid lifters in a '66 292. I understand what you're saying about the stumble when you go to "0" lash, but I think I'd pull the forward side cover and visually confirm the lifter type. JMHO __________________ '68 Short C20 Flatbed Dually w/ 292 4bbl, Langdon cast headers, and WC T5 trans. '81 G10 Shorty Van "Good judgement comes from experience, and a lot of that comes from bad judgement." Will Rogers "Under promise, then over achieve."

05-24-2010, 06:42 PM	#4
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: C60 truck 292 valve lash specs All 292's had hyd. lifters. It should have them unless someone has changed them over which is highly unlikely. They probably needed adjustment for a long time & are stuck in the top position. Maybe an additive in the oil & turn them down one at a time & see if it will stop missing after a minute or so. I would pull a cover like the guys said & take a look at them.

05-25-2010, 12:05 AM	#5
Captain Underdog Registered User Join Date: Jun 2009 Location: Idaho Territory Posts: 32	Re: C60 truck 292 valve lash specs yeah, this thing sat in the warehouse for eight years. Turns over freely, I surely wouldn't think the lifters would freeze before the cylinders. I got lotsa books and couldn't ever find a spec on 292 solids. I'm gonna pull the side cover and look. If they are solids, somebody other than Chevrolet did it. Thanks for all the responses. __________________ "..not ashamed of the gospel" Rom. 1:16 1968 C10 (newly acquired) 1967 Checker Marathon (waiting for paint) 1968 C50 Service Truck (resting in peace for now) I need another project like I need another hole in my head!!!



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