Chubbs
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- Joined
- Jun 24, 2017
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2003 yukon 5.3, vin (Z) flex fuel with 140,000 something miles.
i can really use tips & suggestions for tracking down a coolant leak before I go running around like a chicken with its head cut off, making 2 or 3 runs back & forth across town.
i noticed the surge tank was 1/2 low when i did a random check a week ago: whatever the leak it isn’t hitting the ground so i’ve been looking around. the top of the engine has dust and dirt on top so now it looks wet like mud. — this is looking at it standing on the pass side looking on top of the engine, very front. really the only place the manifold valley is visible.
i’m assuming that whatever needs replacing up there is fairly common and several of guys will all point to the same 1 or 2 diff possible offenders.
i don’t own a pressure kit and wanting to skip the PIA driving around but i can always rent 1 if my 1st attempt at repair-replace fails. i would still need to invest hours cleaning the engine off properly even if i had the test kit and a bunch of stuff moved out the way. it’s prob easier for me to just replace everything with a coolant fitting or gasket on the top end
i want to add coolant and finally decided on the Zerex orange OAT “for American vehicles” including i think 1995+ GM.
the only thing i haven’t serviced on this truck is the coolant. coolant systems are my NEMESIS and i’ve been putting that off. i’ve owned it for 1.5 years now and i assume the red coolant as seen in the surge tank is OEM Dex.
has anyone added the zerex orange to red dex cool? i’m not trying to flush this thing, just top it off.
FYI it looks like the zerex orange used to be labeled zerex dex cool until they rebranded it. says safe for dex cool vehicles but i don’t know if that means after a full system flush or compatible with other “OAT” dex cool manufacturers.
they had a prestone pink label dex cool up there, too but shouldn’t it all be the same and safe to mix?
so what to replace around the intake manifold that could be leaking coolant and combining/mixing zerex orange with whatever type of dex cool already in the truck. thanks for reading! i appreciate any & all feedback
i can really use tips & suggestions for tracking down a coolant leak before I go running around like a chicken with its head cut off, making 2 or 3 runs back & forth across town.
i noticed the surge tank was 1/2 low when i did a random check a week ago: whatever the leak it isn’t hitting the ground so i’ve been looking around. the top of the engine has dust and dirt on top so now it looks wet like mud. — this is looking at it standing on the pass side looking on top of the engine, very front. really the only place the manifold valley is visible.
i’m assuming that whatever needs replacing up there is fairly common and several of guys will all point to the same 1 or 2 diff possible offenders.
i don’t own a pressure kit and wanting to skip the PIA driving around but i can always rent 1 if my 1st attempt at repair-replace fails. i would still need to invest hours cleaning the engine off properly even if i had the test kit and a bunch of stuff moved out the way. it’s prob easier for me to just replace everything with a coolant fitting or gasket on the top end
i want to add coolant and finally decided on the Zerex orange OAT “for American vehicles” including i think 1995+ GM.
the only thing i haven’t serviced on this truck is the coolant. coolant systems are my NEMESIS and i’ve been putting that off. i’ve owned it for 1.5 years now and i assume the red coolant as seen in the surge tank is OEM Dex.
has anyone added the zerex orange to red dex cool? i’m not trying to flush this thing, just top it off.
FYI it looks like the zerex orange used to be labeled zerex dex cool until they rebranded it. says safe for dex cool vehicles but i don’t know if that means after a full system flush or compatible with other “OAT” dex cool manufacturers.
they had a prestone pink label dex cool up there, too but shouldn’t it all be the same and safe to mix?
so what to replace around the intake manifold that could be leaking coolant and combining/mixing zerex orange with whatever type of dex cool already in the truck. thanks for reading! i appreciate any & all feedback