Oil in radiator , but there is no oil and water mixing in sump
Cleaned water system, washed all pipes, cleaned water pipes, flushed radiator ,filled clean water. As soon as i started the engine and opened the radiator filled cap, oil was mixing in the radiator . Strangely there is no water mixing in in the sump .
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Cars & Trucks Master
Re: Oil in radiator , but there is no oil and water...
I am assuming its motor oil and not transmission fluid, right ?
You can have a leaking intake gasket or head gasket and get oil in the coolant without getting coolant in the crankcase.
Same thing opposite. The bigger the leak, the better the chance of getting both at the same time.
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Flush coolant system again. Do you have a brown sludge in the oil. Do this get Preston coolant flush, drain radiator drain coolant tank, fill radiator with water, add the Preston run vehicle for about 15 min remove lower radiator hose from radiator. This will allow all residue to be removed from engine. Replace radiator hose. Fill radiator with appropriate amount of coolant. Disconnect tank from system and let water run through tank until it is clear. Reconnect tank and you should be good. Unless you have oil and coolant mixed which means a blown head gasket or cracked block
Holts Wondarweld Flush engine. EXTERNAL CRACKS 1 Run engine until hot,drain off enough coolant to remove thermostat. 2 Remove thermostat. 3 Mix contents of can thoughoughly! and pour contents into thermostat opening. 4 Replace thermostat cover.& fill radiator with hot water,replace radiator cap. 5 Run engine at a fast idle for 15 mins,dont allow to boil.Top up if necessary. 6 Leave Wondarweld in system for 2-3 days then drain off,flush system replace thermostat and refill. HAIRLINE CRACKS 1 MIX thoroughly and pour into cold engine (radiator if it has a cap) 2 Run engine until hot. 3 Allow engine to cool then run again until hot. 4 Follow procedure 6 above. INTERNAL CRACKS 1 Follow external crack instructions except after pouring Wondarweld into engine remove spark plug from affected cylinder and run engine for 20 mins. If more than one cylinder affected run for 5 minute intervals. 2 Allow engine to cool then drain cooling system and refill with clean water. 3 Drain sump & flush,refill with fresh oil. Note:- 1/2 pint of Wondarweld for every 6 pints of water,DO NOT add antifreeze for at least 3 days after process.
Try with the small stuff first. Replace the thermostat. Before you do that, you should flush and refill your system with just water after the flush process. The bottle of solution that you put into your radiator to flush it and clean it has instructions, follow those. Then let the car cool down and drain the system and refill it with fresh water only. Run this water for a bit and then do it once more. Once cooled back down , replace thermostat and replace the 50/50 mix of antifreeze and water.
Check engine oil level as well, low oil will overheat engines quickly.
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !!
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !!!
About the only way you are going to get that right is to fill the coolant system with a very hot detergent solution and let it stand for a while. Flush and back flush the system (Remove the thermostat for full water flow. Unfortunately you are going to just have to continue doing this until the system is clear. You could use a detergent based engine cleaner or just make up a solution using a powerful washing detergent, but do not use any solvent or oil based cleaners, they will chew up the rubber hoses and seals in the system.. (The radiator could be cleaned at a radiator repair facility).
either you havent flushed the cooling system out properly ,or the oil cooler has packed up ,their is a oil cooler radiator of sorts that the oil filter screws onto ,these often leak ,just remove the water pipes and join them together with a small piece of copper pipe ,then if you see oil coming out of the water pipes fit a new cooler