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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: Jul 2005 Posts: 34 Apprentice | | Apprentice Joined: Jul 2005 Posts: 34 | Hey everyone, Here's one more reason to love your 'bolt: I was looking through the service manual of a relatively modern vehicle yesterday and saw that the carburetor has a "tamper resistant" idle mixture screw. What the heck?!? Tamper resistant? How can it be tampering if it's YOUR OWN D**N CAR ? It reminded me how much I love the style of construction of our trucks. Everything is serviceable, designed to be adjusted, and designed to last a lifetime instead of just until the warranty expires. What was I doing on my '42 the same day I saw that service manual? I was fabricating replacements for missing pieces of my parking brake. It's now working perfectly for the first time in who knows how many decades. Do you suppose that counts as tampering? 
Jon
1942 Chevy 3/4-ton Special
I don't need instructions. I have a hammer.
| | | | | Joined: Oct 2005 Posts: 738 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 738 | That is funny. On my rochaester the idle mixture screw is easy to get to, and very tamperable.
"Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity." - George S. Patton My Machine | | | | | Joined: Dec 2002 Posts: 3,437 Moderator - The Electrical Bay | | Moderator - The Electrical Bay Joined: Dec 2002 Posts: 3,437 | those Carbs are Hi Precision instruments... you dont need to adjust them... they are PERFECT the way they are...
Another quality post.
Real Trucks Rattle
HELP! The Paranoids are after me!
| | | | | Joined: Oct 2005 Posts: 4,249 "Hey! I sound like Darth Vader!! | | "Hey! I sound like Darth Vader!! Joined: Oct 2005 Posts: 4,249 | Here is one reason for that lil' ol' plug. Take a late 80's Chevy pickup with a TBI. Those TBI units have a tamper proof plug for the idle set. Easily drilled and then the idle can be adjusted. Let's say your idle is a bit high. Makes sense to drill the plug and lower your idle, yes? Not necessarily so. Idle (amongst other functions) is controlled by the computer. Let's say one of the TBI flange gaskets has developed a leak. Your idle will go up. Instead of repairing the problem, the vacuum leak, you have changed the factory idle setiing. Sure, your idle is good, but your truck is not fixed. Pretty soon you develope driveability problems that can't be corrected by adjusting that idle screw. You find the leak, repair it and now you can't pass smog or get the truck to idle right 'cause it takes a scope and other stuff to get the idle back into the ballpark.
First thing I did when I got my 1990 GMC R3500 was replace the TBI with an unmodified version. After that, the rest of the problems were easy to find and repair. | | | | | Joined: Oct 2001 Posts: 428 Shop Shark | | Shop Shark Joined: Oct 2001 Posts: 428 | I wouldn't know what to do with my spare time if I couldn't tamper with my truck.  | | | | | Joined: Oct 2005 Posts: 688 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 688 | I feel it is my God given right to TAMPER with my own truck "if my wife lets me" :rolleyes:
Cliff(tamper-proof)59 | | | | | Joined: Apr 2002 Posts: 1,571 Shop Shark | | Shop Shark Joined: Apr 2002 Posts: 1,571 | Hmm...I'd love to see that passage of scripture... :p | | | | | Joined: Jun 2005 Posts: 38 Member | | Member Joined: Jun 2005 Posts: 38 | Shoot, even lawn mower carburetors and propane powered forklifts are all sealed with tamper proof plugs now. Tier2 emissions.....Thank you California!!! | | | | | Joined: Oct 2005 Posts: 4,249 "Hey! I sound like Darth Vader!! | | "Hey! I sound like Darth Vader!! Joined: Oct 2005 Posts: 4,249 | Just wait!! Diesels are getting hammered next! | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Read the directions when you go to rebuild one of those "tamper proof" carbs. "Take a hacksaw & cut grooves in the base of the carb. Then take a hammer & chisel & knock out the plugs". So much for high precision instruments.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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