There has to be a leak. Keep filling it and sooner or later there has to be a pool of water somewhere to give a clue what is wrong.
If the leak isn't obvious it could be the heater matrix leaking into the car. If it has a rear heater it could be a failed pipe leaking underneath right at the back or again leaking somewhere inside.
It could be leaking into the engine, filling either the oil pan or the exhaust. Try checking for an increased oil level. Start the engine to check if it is misfiring and water sprays from the exhaust.
Good luck!
SOURCE: radiator
fill your radiator up, let the vehicle warm up and then shut the engine off. Look for the leak it could be a number of things check hoses, radiator, or the heator core inside the vehicle a strong flashlite and small adjustable mirror helps. Other items to check are waterpump, engine block freeze plugs, also check your oil if it appears milky you could have a blown head gasket.
SOURCE: can not find a radiator to fit 84 rodeo
gemini radiator should be ok as they are same engine
SOURCE: 1990 holden rodeo /isuzu pick-up temp sender
from memory it is in inlet manifold some were in front middle section bottom, (underneath) 4ZE1?
single wire possibly yellow
SOURCE: torque settings for a holden rodeo 3.5 ra. Head
stage 1 = 29Nm(21 lb ft/3.0 kg-m)
final = 64Nm(47 lb ft/6.5kg-m)
do not reuse head bolts or apply any lubricant to the bolts. Do up bolts in following order for each head.
6 1 3 7
front
5 2 4 8
SOURCE: I am losing coolant, not from the radiator and not
you could have a blown head gasket and coolant could be leaking into your combustion chamber.
rent a radiator pressure tester and see if the cooling system will stay at constant pressure. If the pressure drops you have a leak, and it could be your gaskets. pretty costly to repair.
make sure you have not blown the seals on the engines water pump. when they go out, the burst disc on the pump open and gush coolant everywhere.
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