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What is this part?

BTR

Well-Known Member
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City, State
MARIETTA, GA
Year, Model & Trim Level
2000 XLT 4.0 SOHC 4DR 2WD
2000 Explorer XLT 4DR 2WD. 4.0L SOHC JOB 1 (VIN E). 5-Speed Automatic O/D 5R55E. 158,000 miles.

There's a round, plastic ball on top of the front right fender liner. It's about the size of a softball and it has 2 extremely small hoses connected to it. I broke one of the hoses. What is the ball... what does it do... what system is it a part of? Please advise. Many thanks.
 



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I don't know for sure, but I would guess it is a vacuum ball possibly for the HVAC system or emissions.
 






2000 Explorer XLT 4DR 2WD. 4.0L SOHC JOB 1 (VIN E). 5-Speed Automatic O/D 5R55E. 158,000 miles.

There's a round, plastic ball on top of the front right fender liner. It's about the size of a softball and it has 2 extremely small hoses connected to it. I broke one of the hoses. What is the ball... what does it do... what system is it a part of? Please advise. Many thanks.
Vacuum res
2000 Explorer XLT 4DR 2WD. 4.0L SOHC JOB 1 (VIN E). 5-Speed Automatic O/D 5R55E. 158,000 miles.

There's a round, plastic ball on top of the front right fender liner. It's about the size of a softball and it has 2 extremely small hoses connected to it. I broke one of the hoses. What is the ball... what does it do... what system is it a part of? Please advise. Many thanks.
Its the vacuum reservoir. Dorman offers
replacement
 







s-l1600.webp
 






This thread will help .

 






Is the hose break clean, in only one spot and not a significant length missing?

If so then I'd consider getting a hose coupler, for example here is a kit, and I don't know the diameter needed to just get one of them:

Otherwise I'm sure there's forum topics here describing where they go, like to the firewall for the HVAC, and you can replace a hose with bulk vac tubing sold by the foot at auto parts stores, or just add a segment of new hose and two couplers where the broken area is.

Depending on the diameter, even a piece of rubber fuel line hose might work, though if your existing tubing is brittle, it might take finesse to get both ends into a coupler with an air-tight fit. Replacement of the entire (old, brittle) hose would be the safest bet, and most labor.
 






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