Vacuum applies the heat riser. (closes the butterfly valve)
heat riser operation question
69 Chevelle, which way is the exhaust heat riser valve full open? with the vac on the canister, or with no vac on the canister. need to know which direction to tie it off in until I change the manifolds to headers.
Sos
Sos
1 - 1 of 4 Posts
1 - 1 of 4 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Team Chevelle
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Recommended Communities
