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Pressurized coolant overflow/reservoir okay?

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Old Apr 14, 2020 | 08:19 AM
  #1  
Sean White's Avatar
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From: Near Chicago
Car: 1989 Firebird, base model
Engine: 2.8L
Transmission: Automatic
Pressurized coolant overflow/reservoir okay?

The coolant tank on my firebird when I bought it was aftermarket and cracked. Instead of just buying another aftermarket I went with one of those slick looking Rev9 aluminum ones. Having seen similar tanks on other cars here on the group I didn't notice/realize it was a sealed tank. Do I need to vent the tank, and what would be an appropriate solution for that?
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Old Apr 14, 2020 | 08:25 AM
  #2  
GeneralDisorder's Avatar
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From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Pressurized coolant overflow/reservoir okay?

Yes it needs a vent. Drill a hole in the cap. The bottle should never be more than about 3/4 full.

GD
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Old Apr 14, 2020 | 09:50 AM
  #3  
Sean White's Avatar
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Joined: Sep 2019
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From: Near Chicago
Car: 1989 Firebird, base model
Engine: 2.8L
Transmission: Automatic
Re: Pressurized coolant overflow/reservoir okay?

Originally Posted by GeneralDisorder
Yes it needs a vent. Drill a hole in the cap. The bottle should never be more than about 3/4 full.

GD
Awesome, thanks! I assumed it needed to be venting, just didn't want to go drilling without confirmation.
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Old Nov 20, 2021 | 01:24 PM
  #4  
19875speed's Avatar
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From: Pennsylvania
Car: 1989 Formula Firebird
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 3:45
Re: Pressurized coolant overflow/reservoir okay?

Originally Posted by Sean White
Awesome, thanks! I assumed it needed to be venting, just didn't want to go drilling without confirmation.
I have one and I didn't vent it, am I doing any damage by not venting it?
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