Editing Finding vacuum leaks (section)
Jump to:
navigation
,
search
=="Untraceable" vacuum leak== Occasionally on engines that use the intake manifold to seal the lifter valley, you may experience a vacuum leak from the lifter valley area into the intake ports. This may be due to a bad gasket seal or because the intake manifold-to-cylinder head interface was not machined parallel (usually done to correct for [[milling cylinder heads]] and/or block). No amount of propane or carburetor cleaner will find such leaks. The best way to insure there's no such problem is to use quality intake gaskets installed correctly, and to double check any machining before final assembly of the engine. These can be found by removing pcv and plugging pcv hole and attaching vac gauge to pcv inlet, then seeing if crankcase develops vacuum! GM 3.1, 3.4, and 3,8 engines have these problems often.
|
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