Coolant refill on the V6 - TerrainForum.net: GMC Terrain Forum
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  • 1 Post By Colt Hero
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post #1 of 10 (permalink) Old 02-15-2020, 10:51 PM Thread Starter
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Coolant refill on the V6

I cant find the instructions on the forum.
I have the 3.6 V6.

I see instructions for the 4 cyl.


I replaced the water pump today.
Refilled via reservoir.
Ran engine to operating temp.
Now ill let it sit overnight to see if level changes in the reservoir.
Ill top off in the morning.


But this being a SEALED cooling system- are there any other steps steps?


On my traverse- where the radiator has a cap- I refill there- and monitor the overflow. But this is not a sealed system.
Just making sure im not missing something



Any tips would be helpful

2013 Equinox LT1 3.6L V6 FWD 88,000
2010 Traverse LT1 3.6L V6 FWD 153,000
2003 Trailblazer LS 4.2L I6 RWD 181,000
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post #2 of 10 (permalink) Old 02-16-2020, 10:09 AM
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Well, I just looked in the Helm manual for my 3.0L V6 (LFW), and there's nothing earth-shattering in there. I also have just the "surge tank" on mine ... no radiator cap. The Manual just says:

(NOTE: I've trimmed this procedure from the Helm Manual for conciseness):

1.) Remove the cap from the Surge Tank, then raise the vehicle

2.) Drain coolant out the Drain Cockk (NOTE: others prefer to pull the lower radiator hose for fear of breaking the plastic Drain Cockk). Collect the coolant in a large drain pan.

3.) Inspect the coolant ... if "discolored", then perform a flush, otherwise just continue (to refill)

4.) Reinstall Drain Cockk to 2 Nm (18 lb in) ... (or reattach radiator hose), then lower the vehicle

5.) Fill the Surge Tank with 50/50 DEX-COOL/Water mix until the level reaches the base of the Surge Tank

6.) Wait 30 seconds for level to stabilize, then continue filling until the level stabilizes for at least 2 minutes

7.) Idle the engine in PARK or NEUTRAL (with Parking Brake engaged)

8.) Continue slowly filling the Surge Tank until the level stabilizes at the base of the tank.

9.) Re-install the pressure cap on the Surge Tank

10.) Raise engine RPM to 2500rpm for 30-40 seconds

11.) Shut the engine OFF

12.) Allow engine to cool

13.) Remove pressure cap and repeat steps 5-11 until coolant level has completely stabilized within the Surge Tank

14.) Use a Coolant and Battery Fluid Tester ("J 26568") to test the concentration of engine coolant

15.) Top off the Surge Tank if necessary, and always do a final inspection for leaks.
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2011 Equinox 1LT (dlvd. Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 143k miles [15-MAR-2020]

2002 Impala 1LT (dlvd. Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /230k miles [15-MAR-2020]

Last edited by Colt Hero; 02-16-2020 at 10:21 AM.
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post #3 of 10 (permalink) Old 02-16-2020, 11:31 AM
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My 2014 Repair Manual shows the V-6 fill procedure to be almost word for word to Colts post.

Rbarrios, does your 2013 V-6 have a Engine Coolant Air Bleed Pipe?
It goes from a fitting near the upper radiator hose to the top of the coolant reservoir tank.
This constantly vents air bubbles to the tank.

2014 Equinox LTZ FWD 3.6L. V-6 (LFX)
GM6T70 Transmission-Gen II(M7W)
Crystal Red Tintcoat-Brownstone Leather-(FE2) Suspension-18" Wheels
Build Date: Nov. 04, 2013-Delivery Date: Nov. 25, 2013

Last edited by rednox301; 02-16-2020 at 02:12 PM.
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post #4 of 10 (permalink) Old 02-16-2020, 12:12 PM
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Doesn’t appear to be any such hose on my 3.0L, but my ‘97 Taurus has that. Go figure...

2011 Equinox 1LT (dlvd. Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 143k miles [15-MAR-2020]

2002 Impala 1LT (dlvd. Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /230k miles [15-MAR-2020]
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post #5 of 10 (permalink) Old 02-16-2020, 02:09 PM
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Quote:
Originally Posted by Colt Hero View Post
Doesn’t appear to be any such hose on my 3.0L, but my ‘97 Taurus has that. Go figure...
I did a quick search on GMPartsDirect
Came up as GM part #12637188.
Equinox 2010-2017 3.0L or 3.6L
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2014 Equinox LTZ FWD 3.6L. V-6 (LFX)
GM6T70 Transmission-Gen II(M7W)
Crystal Red Tintcoat-Brownstone Leather-(FE2) Suspension-18" Wheels
Build Date: Nov. 04, 2013-Delivery Date: Nov. 25, 2013

Last edited by rednox301; 02-16-2020 at 02:20 PM.
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post #6 of 10 (permalink) Old 02-16-2020, 04:23 PM
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Quote:
Originally Posted by rednox301 View Post
I did a quick search on GMPartsDirect
Came up as GM part #12637188.
Equinox 2010-2017 3.0L or 3.6L
Ohhhh ... I see it now. Thanks!

Looks like a hard pipe from the passenger side, across the top of the engine (L to R), followed by a hose that takes it the rest of the way to the Surge Tank.

Gotta take that stupid plastic cover off to actually see it, I guess...

2011 Equinox 1LT (dlvd. Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 143k miles [15-MAR-2020]

2002 Impala 1LT (dlvd. Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /230k miles [15-MAR-2020]
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post #7 of 10 (permalink) Old 02-16-2020, 07:57 PM Thread Starter
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ok, so level didnt drop overnight.
Ive driven it a good 50 miles today with an OBD scanner plugged in to monitor temp. 179-190 (street and highway).


As for that bleeder pipe....
I had to look up that part #.
Once I saw the picture--- I remember seeing that green ring on a fitting attached to the top rad hose connection point.

Didnt realize what it was.
Just went out to check it out.


here it is in green. on the connector to the upper coolant pipe,The metal bar runs across the top of the intake to the reservoir.
The picture was when the Nox was brand new.



Colt and Red Nox- thanks for the info


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2013 Equinox LT1 3.6L V6 FWD 88,000
2010 Traverse LT1 3.6L V6 FWD 153,000
2003 Trailblazer LS 4.2L I6 RWD 181,000

Last edited by rbarrios; 02-16-2020 at 08:06 PM.
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post #8 of 10 (permalink) Old 02-16-2020, 08:08 PM Thread Starter
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so it appears air will reach that high point- and be purged out through that pipe and into the tank.
So I will get a turkey baster and suck out the extra coolant t bring it back to the FULL COLD.


Thanks again.

2013 Equinox LT1 3.6L V6 FWD 88,000
2010 Traverse LT1 3.6L V6 FWD 153,000
2003 Trailblazer LS 4.2L I6 RWD 181,000
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post #9 of 10 (permalink) Old 02-16-2020, 08:44 PM
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Quote:
Originally Posted by rbarrios View Post
so it appears air will reach that high point- and be purged out through that pipe and into the tank.
So I will get a turkey baster and suck out the extra coolant t bring it back to the FULL COLD.


Thanks again.
Yup you're exactly right

2014 Equinox LTZ FWD 3.6L. V-6 (LFX)
GM6T70 Transmission-Gen II(M7W)
Crystal Red Tintcoat-Brownstone Leather-(FE2) Suspension-18" Wheels
Build Date: Nov. 04, 2013-Delivery Date: Nov. 25, 2013
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post #10 of 10 (permalink) Old 02-16-2020, 08:54 PM
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You guys might've inspired me to actually find the time between now and my next road trip to (finally) change the DEXCOOL in my 2011 Nox! This is a record for me ... going on the original coolant at 142,000+ miles. I know with my '02 Impala, it had the infamous Lower Intake gasket leak, and so I ended up replacing the coolant during that project (at 104,000 miles). '97 Taurus was also around 100,000 ... but that turned out to be a mistake due to Ford's wretched contaminated cooling jackets.

2011 Equinox 1LT (dlvd. Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 143k miles [15-MAR-2020]

2002 Impala 1LT (dlvd. Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /230k miles [15-MAR-2020]
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