There are two metal balls under the dash that are connected to the vacuum vent system. What are they called?

Asked by Jul 29, 2013 at 06:51 PM about the 1997 Dodge Ram 1500 2 Dr Laramie SLT Extended Cab LB

Question type: Maintenance & Repair

Vent goes from vent to defrost or no vent with load on engine. Returns to vent when load reduces. 1997 Dodge Ram 1500 Laramie SLT 5.9 Ltr engine.

5 Answers

vacuum reservoirs?

1 people found this helpful.

so functionality will not go dead when the motor dies~

vacuum accumulators!

1 people found this helpful.

you see these "little cannonballs" on ABS systems...they hold pressure~

9,035

they are called vacuum accuator motors. they typically have spring on one side, and vacuum pulls against spring tension. when vac. goes away, spring tension takes over and accuator goes back to relased position.

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