235 head bolts single use? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hogger54 · 11-09-2013, 10:00 PM

Are the head bolts in a 235 single use bolts? Are they the stretch type, or can they be re-used?

dwcsr · 11-10-2013, 12:16 AM

They can be reused. They are not torque to yield. It is best that you do replace them if they are original to the engine.

Speedbumpauto · 11-10-2013, 09:55 AM

I'd be hard pressed to buy new bolts for that engine unless I knew it had been apart many times or had obvious signs of corrosion or abuse. Those were tough old engines and they're not holding a lot of compression. JMO.

_Ogre · 11-10-2013, 12:30 PM

reusable bolts

**Dan in Pasadena** · 11-10-2013, 01:20 PM

Quote:

Originally Posted by Speedbumpauto

I'd be hard pressed to buy new bolts for that engine unless I knew it had been apart many times or had obvious signs of corrosion or abuse. Those were tough old engines and they're not holding a lot of compression. JMO.

Exactly.

Back in those days no ever gave a thought to such a thing as "torque to yield". This is where current era technology is overkill when working on 50-60 year old equipment.

OrrieG · 11-10-2013, 01:53 PM

Those engines were designed to be overhauled by farmers in the barn. Just torque them to specs then during the first valve adjustment after running it for a while check them again. This assumes they are in good shape and the engine hasn't been sitting for 50 years with the valve covers off in the rain.

Hogger54 · 11-10-2013, 02:16 PM

Sweet. They are in good shape.
I was just doing some research on it and couldn't find any info, or bolt kits for sale.

11-09-2013, 10:00 PM	#1
Hogger54 Registered User Join Date: Aug 2013 Location: Lumberton, TX Posts: 284	235 head bolts single use? Are the head bolts in a 235 single use bolts? Are they the stretch type, or can they be re-used? __________________ My '54 3600 build. My '63 GMC build

11-10-2013, 12:16 AM	#2
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: 235 head bolts single use? They can be reused. They are not torque to yield. It is best that you do replace them if they are original to the engine.

11-10-2013, 09:55 AM	#3
Speedbumpauto Registered User Join Date: Aug 2011 Location: Tucson, AZ Posts: 917	Re: 235 head bolts single use? I'd be hard pressed to buy new bolts for that engine unless I knew it had been apart many times or had obvious signs of corrosion or abuse. Those were tough old engines and they're not holding a lot of compression. JMO.

11-10-2013, 12:30 PM	#4
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,680	Re: 235 head bolts single use? reusable bolts __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer

11-10-2013, 01:53 PM	#6
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: 235 head bolts single use? Those engines were designed to be overhauled by farmers in the barn. Just torque them to specs then during the first valve adjustment after running it for a while check them again. This assumes they are in good shape and the engine hasn't been sitting for 50 years with the valve covers off in the rain. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

11-10-2013, 02:16 PM	#7
Hogger54 Registered User Join Date: Aug 2013 Location: Lumberton, TX Posts: 284	Re: 235 head bolts single use? Sweet. They are in good shape. I was just doing some research on it and couldn't find any info, or bolt kits for sale. __________________ My '54 3600 build. My '63 GMC build



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