Editing How to rebuild a Rochester Quadrajet 4MV carburetor (section)
Jump to:
navigation
,
search
=====Stripped or loose/damaged fuel inlet threads===== This is an all-too-common problem on the Q-jet. Because the casting is relatively thin and the threads are so large (7/8-20 for most 1971-back carbs, 1"-20 for later carbs), using an oversize fuel inlet to cut new threads is to be avoided if at all possible. The better solution is to use a helicoil-type thread insert. For best results this requires a mill and a fixture for holding the carb body perfectly in alignment for the tap to cut the threads. The tap has to be modified to also cut the seat at the bottom of the threads for the inlet gasket to seal on. [http://www.cliffshighperformance.com/services.html Ruggles] and [http://quadrajetparts.com/rochester-quadrajet-parts-quadrajet-inlet-fittings-service-fuel-inlet-thread-repair-heli-coil-installation-inlet-carburetors-pr-356.html Gessler] will do this operation, cost varies. If using a helicoil repair is not possible for whatever reason, there are self tapping fuel inlets available, like from [http://www.gesslerheadporting.com/gesslerheadporting/ghp.nsf/822dcaaaa26c6da985256dd80023623d/a661ef84a4b8f9f6852574fd005f54f8!OpenDocument Gessler].
|
Editing help
(opens in new window)
Personal tools
Log in / create account
Namespaces
Page
Discussion
Variants
Views
Read
Edit
View history
Actions
Search
Navigation
Main Page
Recent changes
Random page
Help
All articles
Start a new article
Hotrodders forum
Categories
Best articles
Body and exterior
Brakes
Cooling
Electrical
Engine
Fasteners
Frame
Garage and shop
General hotrodding
Identification and decoding
Interior
Rearend
Safety
Steering
Suspension
Tires
Tools
Transmission
Troubleshooting
Wheels
Toolbox
What links here
Related changes
Special pages
Terms of Use
Copyright
Privacy Policy
Your Privacy Choices
Manage Consent