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Click on image for the lowdown. 
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| | | Forums66 Topics128,021 Posts1,055,372 Members48,420 | | Most Online14,466 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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | The intake valve is directly above the piston at TDC, with very little safety margin. If the valve sticks in the guide, since the valve is nearly vertical the piston may just push it back. If not, the valve bends or punctures the piston dome.
The exhaust valve can't hit. | | |
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