Proud Injector Swapper!!

[Just a Six?]

Not an awful lot since the housing that holds it to the engine blocks 80% of the hole drilled. Try to get it as close to the centre as possible & make sure the hole is pointed at the Top when installed. I put a couple holes in one stat but my car runs cool with the recored stock rad & dual fans so I can't say how well it worked? At very least it will allow the steam out & maybe helps with air in the system? 

[Steve Wood]

That's what I was thinking. Hey, what does drilling a hole in the T-Stat do?

In theory, it lets air escape the block so the block is fully filled with coolant.  In practice, it might make it a bit faster but after a couple of warm/cool off cycles, it should purged into the coolant reservoir anyway.

Hole should be positioned at the top as David said.  I used to drill them, but after looking how the water outlet blocks the hole, I figured it was mostly a waste of time with these small thermostats

No more than a couple of 1/16" holes...or the car will not warm up in the winter if there is enough room for flow...

[phil_long]

Cool, one less thing I have to do. I do want to be sure that local parts store DO sell 180's that fit our car? The last 160 I got was too big

[SuperSix]

http://www.nos4gn.com/servlet/the-136/Buick-Grand-National-parts/Detail

[earlbrown]

Cool, one less thing I have to do. I do want to be sure that local parts store DO sell 180's that fit our car? The last 160 I got was too big

Do you have a set of tin snips you could introduce that big 160 to?

[Steve Wood]

Cool, one less thing I have to do. I do want to be sure that local parts store DO sell 180's that fit our car? The last 160 I got was too big

http://www.autozone.com/autozone/parts/1987-Buick-Regal/Thermostat/_/N-iidqmZ8gctr?filterByKeyWor d=thermostat&fromString=search

They may

[Just a Six?]

One day I would like to see a test of the 160* & 180* stats installed with/without the steam holes drilled. I would guess that the car might run a couple * cooler but I have no proof thats what happens? Plus I'm sure each car has added mods that may affect the numbers? I dont see a downside with a summer only car so I'll keep drilling holes for now.
If I had the Motivation Phil does (I used too!!) I would do it but I seem to enjoy my couch more now than back in the 90's when I had lots of extra energy! 
 
Keep on wrenching Phil as it just may Motivate Me to get off my AZZ & do some work on the car before winter rolls in! 

[phil_long]

One day I would like to see a test of the 160* & 180* stats installed with/without the steam holes drilled. I would guess that the car might run a couple * cooler but I have no proof thats what happens? Plus I'm sure each car has added mods that may affect the numbers? I dont see a downside with a summer only car so I'll keep drilling holes for now.
If I had the Motivation Phil does (I used too!!) I would do it but I seem to enjoy my couch more now than back in the 90's when I had lots of extra energy! 
 
Keep on wrenching Phil as it just may Motivate Me to get off my AZZ & do some work on the car before winter rolls in! 

Lol. Thanks gents

[Steve Wood]

It just makes it easier to burp air out of the system, in theory....

[earlbrown]

I've seen OEM's that mount vertical have a steam hole with some sort of floating pin in them. My slant6 is that way I think.

Normally I like to put 4 very small holes on mine when the mount horizontal just to keep it flowing. Been doing it (huh huh "doing it") for decades and none of my cars have exploded on me yet.

[phil_long]

re-adjusted the TV cable. car shifts extremely soft at the 4th notch, and a little earlier than i would like. Guess I'll pull it back one.

[Steve Wood]

that should do it...you cannot go four and a half...

[phil_long]

So leave it? Lol. Im all confused.  haahahahahaha

[phil_long]

And how does your car shift with the TV where its set at?  Firm?

[phil_long]

I like the way its shifting now!!