I have a 1998 Chevy Suburban K2500 4x4 (7.4L gas) with 117k miles. The
radiator developed a crack in the oil cooler tank right beside the upper oil
cooler fitting. So, it was time to replace the radiator -- and while I was
at it the water pump, thermostat and upper/lower radiator hoses.
Before starting the work, I check the coolant level and it was at the top of
the radiator neck. The coolant resevoir was empty (some coolant lost due to
the leak). When I drained the radiator, I checked the amount of coolant
collected and it was approx 2 gallons. After removing the radiator and the
radiator hoses, I removed the water pump. I then removed the coolant drain
plug on the passenger side of the engine and about 2.5 gallons of coolant
I then removed the drain plug on the driver side of the engine --- maybe 2
drops of coolant came out. So at this point, I only have 4.5 gallons of
coolant. The capacity of the cooling system is 27.5 qts -- so now I am
wondering where the rest of the coolant is and why didn't any coolant drain
from the driver side of the engine. Some coolant did of course spill on the
ground in the process -- but not that much. Even if 1/2 gallon made it to
the ground, there is still quite a bit of coolant hiding somewhere.
I noticed that the coolant was still pooled at the driver side water pump
port. The passenger side water pump port is empty. I have a picture at :
http://home.tx.rr.com/theroberts/1998%20Chevy%20Suburban%20K2500/ -- just
select the "Radiator work" pdf file. Note: the coolant appears green
because I had previously added some dye which changed the Dexcool color from
red to green.
- Should there have been coolant draining from BOTH drain plugs ? The GM
service manual just says remove the drain plug -- doesn't even mention (in
the text or diagrams) that there are two.
- Since there is obviously still coolant sitting on one side, does this
basically mean I have a blocked coolant passage ?
I would prefer to remove all the old coolant -- I could put everything back
together and flush with water. But I'm concerned about the coolant not
draining from the one side.
Any ideas or suggestions are greatly appreciated.