Question about antifreeze

[about20ninj45]

Is anyone constantly adding coolant to thier yukon denali? Im at 240k and i have to fill coolant every 4 days, im to the point where i dont even add coolnat anymore and the truck operates at normal temps...weird. I dont have any leaks so im assuming coolant is being burnt out the exhaust/oil. but the oil isnt milky and i dont have a sweet burning smell coming from my exhaust so no bad gaskets that i know of. Any suggestion?

 

[ccapehartusarmyINF.(ret)]

okay how much coolant are you down every 4 days because if you low on coolant all the time you have a leak somewhere you need to test your cooling systems pressure it needs to be at least holding 15 psi if its not your vehicle will over heat as soon as you sit somehwere to long or it gets hot out see at regulaar outside atmospheric pressure coolant boils at the same temp as water 212 dagrees but at 15 psi it doesnt boil till 245 dagrees

 

[about20ninj45]

okay how much coolant are you down every 4 days because if you low on coolant all the time you have a leak somewhere you need to test your cooling systems pressure it needs to be at least holding 15 psi if its not your vehicle will over heat as soon as you sit somehwere to long or it gets hot out see at regulaar outside atmospheric pressure coolant boils at the same temp as water 212 dagrees but at 15 psi it doesnt boil till 245 dagrees

how would i go about performing this test ?

 

[ezdaar]

http://www.autozone.com/test-scan-and-specialty-tools/cooling-system-test-kit

 

[about20ninj45]

ahh so its done by pressuring the radiator. Thanks, you guys are the ish lol. Iw will go pick one up today and report my findings...

 

[ezdaar]

don't get silly with high psi and crack open your endcaps.

 

[about20ninj45]

don't get silly with high psi and crack open your endcaps.

roger that.... side note, does anyone know where i can get the connectors that go on the end of the trans cooling lines into the radiator? mine are loose and i think im losing trans fluid. temp keeps rising on trans to about 200. im assuming this to be the culprit

 

[ezdaar]

there is a thread here detailing that exact topic and how to fix it.
search, bruh, search.

And if your going to pop those lines loose. take the opportunity to install a bigger trans cooler.
Read here for info and parts, just be smart and make sure it will bolt up. or use the pics to fab up your own.

Also install a external oil filter relocation kit. they are cheap and the oil filter does a much better job of keeping trans fluid clean. get some 90* fittings to clean up the install.

 

[ccapehartusarmyINF.(ret)]

okay are you losing trans fluid or coolant because losing trans fluid is a whole different problem

 

[about20ninj45]

there is a thread here detailing that exact topic and how to fix it.
search, bruh, search.

And if your going to pop those lines loose. take the opportunity to install a bigger trans cooler.
Read here for info and parts, just be smart and make sure it will bolt up. or use the pics to fab up your own.

Also install a external oil filter relocation kit. they are cheap and the oil filter does a much better job of keeping trans fluid clean. get some 90* fittings to clean up the install.

I guess this is tha part where i tell you that i did search ...just not for that, i was searching for the coolant problems....;/ my apologies. and i losing coolant not trans fluid..well tech im losing both, just mor coolant that trans fluid

 

[ezdaar]

no worries.

 

[clandr1]

okay are you losing trans fluid or coolant because losing trans fluid is a whole different problem

This is a great question.

OP, based on your responses, I'm assuming you're losing BOTH coolant AND transmission fluid.

Regarding the coolant disappearing, are you seeing any coolant on the ground after you drive for a while and then park somewhere? If not, you might have cracked heads that is allowing your coolant to escape.

http://www.gm-trucks.com/forums/topic/139335-castech-cylinder-heads/

http://www.fullsizechevy.com/forum/...enance/415693-coolant-loss-castech-heads.html

 

[about20ninj45]

This is a great question. Based on your responses, I'm assuming you're losing BOTH coolant AND transmission fluid.

Regarding the coolant disappearing, are you seeing any coolant on the ground after you drive for a while and then park somewhere? If not, you might have cracked heads that is allowing your coolant to escape.

http://www.gm-trucks.com/forums/topic/139335-castech-cylinder-heads/

http://www.fullsizechevy.com/forum/...enance/415693-coolant-loss-castech-heads.html

leaking other thinks, no coolant, no castech heads and no residue around the heads, engine bay is bone dry

 

[ccapehartusarmyINF.(ret)]

yes if your trans cooling lines are loose then that would be your culprit as far as were your coolant is disapearing to
how much trans fluid are down? are you noticing any symptoms like slipping?

 

[about20ninj45]

yes if your trans cooling lines are loose then that would be your culprit as far as were your coolant is disapearing to
how much trans fluid are down? are you noticing any symptoms like slipping?

no slipping as of yet with 240k on the dash, but dont jinx it! lol i have plans to install the corvette servo, but figured i wuoldnt do it untill i replaced the trans lines. if i fill the resevior up with coolant, it was stay at that level for 3 days and then drop to the add line, sometimes, its been bone dry. My thermostat seems to be working correctly the only gauge that causes me concern is the temp of the trans going to 200 and staying there. doesnt matter if its winter or summer. In the winter, i use alot more coolant for some reason. Found that out because the heat stopped working one day, added coolant, heat came back lol

 

[ccapehartusarmyINF.(ret)]

yeah you need to check your cooling systems pressure because that coollant is going somehwere id thoroughly clean your engine like at one of those DIY washes because when i had a leak it was being hidden by caked up dirt and grime. a cooling system with proper coolant level and proper pressure proper working thermostat and fan clutch or e fan should be able to keep your engine and trans at the proper operating temp even in extreme outside air temps like here in arizona

 

[mtocrs1]

I fought the same coolant issue on our 2005 Avalanche. In the end I traced it down to the gasket between the block and water pump. I could never see coolant anywhere but could always smell it burning. In the end I went to my local Chevy dealership and purchased some GM coolant seal tabs. Put those in the coolant reservoir topped of the coolant and fixed now for 30k miles.
GM uses the same seal tabs in the factory to ensure no leaks.


Sent from my iPhone using Tapatalk

 

[about20ninj45]

I thought those coolant tabs and stop leak killed radiaotrs and engines

 

[ccapehartusarmyINF.(ret)]

never heard of those killling yer radiator or engine i have heard of other non traditional methods killing radiators like those quick fixes like ive heard people say eggshells can fix a coolant leak (no no no no no no)

 

[about20ninj45]

I still feel like those items are bandaid. No fixing the root cause. Used stop leak one time in my engine...back when i had a wj (jeep) needless to say, i dont have it anymore. The pellet did some bad things to that engine.