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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2011 Posts: 687 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 687 | I replace my 216 with a 235 that was rebuilt some time ago with approximately 4000 miles on it. I'm not sure if the valve guides were hardened? I have NOT been using any additive and do not see any problems so far.
Thoughts of what to look for, etc/???
Thanks. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | look for a long and happy life  unless you are working the truck really hard [heavy loads, high RPM, lots of miles per year], don't worry about it until you've gone another 80,000 miles Bill | | | | | Joined: Aug 2012 Posts: 402 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 402 | You mean hard seats? They can go out but the chances are slim, Its the gas we have to use is the problem, Some gas is very dry(no lead) and that's where the problem begins,And all the stovebolts back then were made out of good cast iron, not the crap we have today,Today is all about saving weight and thin castings.
http://s1055.photobucket.com/user/baldybenny/library/ 1936 1.5 wrecker,1937 gmc coe,1939 Chevrolet coe,1942 4x4 coe, 1942 coe,1946 dump,1947 2 ton dump,another 1947 2 ton dump,1950 coe,1967 c30,1937 cat 22,1936 Chevrolet 5 window foremans coupe, 1914 ford speedster.
| | | | | Joined: Apr 2010 Posts: 283 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 283 | And remember, the lead was tetraethyl lead, a costly additive mostly to raise octane.
The lead added gas was called "Ethyl" for obvious reasons or hi test and in the rural areas NOBODY invested in hi test for their working class stovebolt.
So you might say these engines were designed for unleaded fuel.
Then again I never knew anyone in our circle that saw 150,000 miles without opening the engine for repair.And very few cars were run to 150,000 miles
Poor oils and not enough servicing would have most down for repair before 100,000.
In my opinion, excessive valve train clearance, noticible by excessive noise is more harmful to valve seating surfaces than lack of lead.
Bob Taylor
| | | | | Joined: Aug 2011 Posts: 687 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 687 | Great thoughts folks. I learn something every day. | | |
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