Who drills thermostats, which drill bit?

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Oct 21, 2012 | 09:43 PM

Rockville

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Joined: Sep 2012

Posts: 164

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Model: Cherokee

Who drills thermostats, which drill bit?

I replaced thermostat and noticed that old one had small air-passing valve, but new one didn't.
Is that a good idea to drill small hole?

Oct 21, 2012 | 09:47 PM

Bustedback

CF Veteran

Joined: Feb 2010

Posts: 12,367

Likes: 23

From: Oroville, CA

Year: 1995

Model: Grand Cherokee

Engine: 4.0 with all of the noise and clatter

It is a good idea, it only requires a 1/16th" drill bit.

Oct 21, 2012 | 09:59 PM

djb383

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Joined: Nov 2009

Posts: 8,172

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From: The Republic of TEXAS

Year: 1998

Model: Cherokee

Engine: 4.0L HO

Check the new stat for a air bleed "notch" (yellow circle). Place the notch at the 12 o'clock position like u would a stat with a jiggle valve. If the stat has the notch or jiggle valve, call it good.

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Last edited by djb383; Oct 21, 2012 at 10:02 PM.

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