Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - SBC head question
View Single Post
  #3 (permalink)  
Old 03-03-2007, 01:30 PM
xntrik's Avatar
xntrik xntrik is offline
Save a horse, Ride a Cowboy.
Last photo:
Join Date: Jul 2005
Location: Arkansas
Posts: 5,131
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Originally Posted by brian12c
on a gen 1 sbc head what is the hole for that is on the exhaust side in between the far left and middle exhaust port? thanks BF
Temperature sender in the driver's side head.

The built-in water pump bypass is on the passenger side, so the driver's side head tends to run hotter.

Also the stock SBC water pump tends to flow more on one side than the other in varying conditions.

This picture shows the bypass plugged with an allen head plug for racing purposes only. Don't do this on any street car without other provisions for bypass.
Attached Thumbnails
Click image for larger version

Name:	chevy water pump from Car Craft.jpg
Views:	150
Size:	14.4 KB
ID:	19023  
Reply With Quote