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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Dec 2010 Posts: 253 Shop Shark | | Shop Shark Joined: Dec 2010 Posts: 253 | I want to do a compression test on the 235 splash oiler that is in my truck but with the plug holes being so small my tester will not fit. What are you guys using to adapt a comp. tester to these older motors ?
1945 Chevrolet G 506 1.5 Ton Military 4X4
1967 Jeep Cj5 with 283 SBC
| | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | Most tool suppliers have an adapter. I know that KD and Snap On both have them. | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | And some compression testers have a rubber tip but you need to hold it in place. | | | | | Joined: Feb 2004 Posts: 29,760 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,760 | An adapter can be made from a discarded spark plug shell with a little creative drill & tap work. File or grind the crimp away that holds the porcelain center in place, remove it, and tap the shell for the 14MM thread that the later-model engines use. Then thread the adapter onto your compression tester.
Jerry
Last edited by Hotrod Lincoln; 11/09/2011 7:32 PM.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: Jul 2011 Posts: 24 New Guy | | New Guy Joined: Jul 2011 Posts: 24 | Advance auto carries a tester for the 10mm | | |
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