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55’ Pontiac station wagon Chevy 350/350
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Discussion Starter · #1 ·
Hi there I have a 91 G20 Chevy van with 350 and I’m replacing the master brake cylinder and booster.
On my stock brake master cylinder there is 2 chambers. the rear cap says to use Dot 5
And the front cap says to use Dot 3.
I have never seen this before and have always used Dot 3 on all my vehicles.
the new master cylinder I got through orilley both chamber caps say use dot 5. could the dot 3 cap be a pick a part cap from something else maybe? Thank you so much for your help!!!!
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· Registered
55’ Pontiac station wagon Chevy 350/350
Joined
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401 Posts
Discussion Starter · #5 ·
Can't mix DOT 3 with DOT 5. Your van uses DOT3
That’s what I think. I’ve never used dot 5 on any of my early 90s chevys. Just not sure why the aftermarket MBC caps say to use dot 5. Cannot find anything online other than dot 5 is for race cars and motorcycles.
i Think I’m going to just go with dot 3.
 
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