Whats the correct way to bleed the cooling system?

[silversrt]

As I was putting in my Paxton, I decided to go ahead and put in my
172 t-stat.Well, after firing up yesterday I notice my engine temp is 200-205
Shouldnt it be lower w/ the new t-stat? I opened up the bleeder valve when I was filling the coolant and heard a lot of air coming out.Do I have to bleed it after its at running temp? Just wondering.

 

[ViperTruck2933]

Yes, get it up to operating temp and then bleed it using the petcock on top of the T-Stat housing. And don't forget to add coolant to you resevoir tank (if needed) after bleeding.

 

[silversrt]

Yes, get it up to operating temp and then bleed it using the petcock on top of the T-Stat housing. And don't forget to add coolant to you resevoir tank (if needed) after bleeding.

Thanks bro! I will do that today.

 

[Nowwhat]

this has come up before....people have bled there system only to have heat problems again....turns out there was still more air.....:dontknow:

 

[FlyingLow]

I'm thinking about changing my T-stat next weekend. I have had this new t-stat for like 5 months just sitting. I'm a little nervous on swapping it out as I not real mechanical.

 

[ViperTruck2933]

I'm thinking about changing my T-stat next weekend. I have had this new t-stat for like 5 months just sitting. I'm a little nervous on swapping it out as I not real mechanical.

It's real easy Bro. Just take your time and read all the instruction threads here and you won't have any problems.

Get some small plastic tubing 1/4 or 3/8 like the kind used for a fish tank air pump. Find the petcock drain on the lower driver side of the radiator and push the tubing (hose) over the nipple. That'll allow you to drain coolant without making a mess all over (inside) your front air dam. Other than that, the only challenging part is getting to the lowest bolt on the T-stat cover. You will have to do that one by feel, cause you can't see it from up top.

 

[FlyingLow]

It's real easy Bro. Just take your time and read all the instruction threads here and you won't have any problems.

Get some small plastic tubing 1/4 or 3/8 like the kind used for a fish tank air pump. Find the petcock drain on the lower driver side of the radiator and push the tubing (hose) over the nipple. That'll allow you to drain coolant without making a mess all over (inside) your front air dam. Other than that, the only challenging part is getting to the lowest bolt on the T-stat cover. You will have to do that one by feel, cause you can't see it from up top.

I might give it a shot. I got to figure out what type of replacement coolant to use.:dontknow:

 

[ntw0rk]

If you catch the fluid with the hose in a clean bucket, is it ok to reuse it?

:dontknow:

 

[FlyingLow]

If you catch the fluid with the hose in a clean bucket, is it ok to reuse it?

:dontknow:

I would think you could.:dontknow: But how many miles before it needs to be changed anyway?

 

[ViperTruck2933]

You can re-use the old coolant if it's clean, no problem. I would buy the Mopar red coolant from the stealership, it's not the same as the old green stuff. It's very reasonably priced:rock:

 

[breederofkoi]

I would think you could.:dontknow: But how many miles before it needs to be changed anyway?

Coolant is good as long as it retains its freeze point, although, over time, coolant can lose heat transfering properties and lubricity... I would say 3 to 5 years, then its time to change coolant. Example, cummins motors in construction equipment recomend coolant change at 2,000hrs/2 years, or if freeze points falls to low...