Jump to content

Thermostat - 302


Recommended Posts

I have been told by many to drill a 1/8" hole at the upper edge of the thermostat before placing it in the housing to alleviate the initial pressure.  However, the new one I purchased does not have a hole and I cannot find a thermostat for a 73' 302 anywhere with a pre-drilled hole.  There are also no mention of drilling a hole in any of the old repair manuals for the car 

 

Is this recommended?  If the hole is drilled, what are the consequences?

 

Thanks,     :thankyouyellow:

Dan

 

325x207https://i.ibb.co/TK5BXKx/IMG-20180901-180559190.jpg[/img]

 

Link to comment
Share on other sites

The idea behind the hole is to allow any air to bleed out of the intake before the t-stat opens. This prevents the initial huge "burp" as the trapped air comes blasting out the top radiator hose.

 

There is no downside to drilling the hole. Just get a good quality t-stat and do the deed. When you install it, put the hole at the 12 o'clock position.

 

 

Link to comment
Share on other sites

 

The idea behind the hole is to allow any air to bleed out of the intake before the t-stat opens. This prevents the initial huge "burp" as the trapped air comes blasting out the top radiator hose.

 

There is no downside to drilling the hole. Just get a good quality t-stat and do the deed. When you install it, put the hole at the 12 o'clock position.

 

Link to comment
Share on other sites

the best place to drill the 1/8 in hole is between the "Y". and have it at 12 like mentioned. also if u install with the "Y opening at the top and get a new stat housing with a access hole on top u can put in a temp gage there and not hit anything. so no removal and placement of stat housing once done.

Link to comment
Share on other sites

the best place to drill the 1/8 in hole is between the "Y". and have it at 12 like mentioned. also if u install with the "Y opening at the top and get a new stat housing with a access hole on top u can put in a temp gage there and not hit anything. so no removal and placement of stat housing once done.

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...