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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: Apr 2013 Posts: 82 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2013 Posts: 82 | OK, Just got a 41 chevy pickup and it smokes on startup and acceleration (blue smoke) I believe it is valve seals. Has the original 216 engine. Should I replace using original type valve seals or should I replace with umbrella type. I think the valves are 11/32". Is that correct. If I should replace what type and where to get them? Will it hurt for me to drive it in this condition. Also, would excessive oil in the pan cause this smoking condition?
| | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Smoking on accelleration would probably not be seals. Seals alone will cause smoke after idling as in pulling away from a stop light. | | | | | Joined: Apr 2013 Posts: 82 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2013 Posts: 82 | ok. observations are with it idling in driveway and pushing on accelerator pedal. Not sure when it is driving. Waiting on title.
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | If the engine has not been messed with and it is a 1941 it will not have valve seals. It will instead have caps that fit over the top of the stem and spring retainer to shed the oil to the outside of the spring. These caps get removed over time and that leaves the valve with no seal at all. They will smoke quite a bit in this case.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Apr 2012 Posts: 135 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 135 | I put the umbrella seals that ride up and down with the valve, not fit tight over the upper part of the valve guide, on my '51 235. They work great for me. Got mine at the local auto parts store.
Last edited by Bolter2; 08/25/2013 11:23 AM.
| | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I understand that the umbrella seals for a 302 (Ford?) work quite nicely. Have I got my facts correct? | | |
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