Antifreeze Question
Thread Starter
Teching In
Joined: Jul 2018
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Antifreeze Question i flushed my system with prestone flush stuff then flushed it 5 more times and kept getting the rust color water upto the 6th flush the dip pan i was using kept turning the color of the antifreeze green visually but when poured out it was rust color the color never got clearer
by the last flush i figured it was the best i could get and put in prestone dexcool and ran my truck 150 miles between yesterday and today with no issue by the above should i be ok or should i flush the system again till i get it clear?
by the last flush i figured it was the best i could get and put in prestone dexcool and ran my truck 150 miles between yesterday and today with no issue by the above should i be ok or should i flush the system again till i get it clear?
If you can get a decent price on a new radiator I'd change the radiator and flush again. It's the cheapest thing to do right now besides just let it go and hope nothing clogs any passages.
The only way you can really "flush" the system is to fully drain it. When you drain the radiator, 50% of the coolant is still left behind in the engine. To do a proper flush, go through the factory procedure and open the two drain ***** on the sides of the engine block. (This makes quite a mess - but it will get everything out during your flush.)
The factory procedure is to:
- Drain the radiator
- Remove and drain the overflow tank
- Disconnect the heater core and drain those two lines
- Open up the two coolant galleys on either side of the engine block and drain those (HALF of the coolant lies here!)
This thread helps in finding the two drain plugs on the block: (they area a real PITA) https://ls1tech.com/forums/generatio...k-coolant.html
The factory procedure is to:
- Drain the radiator
- Remove and drain the overflow tank
- Disconnect the heater core and drain those two lines
- Open up the two coolant galleys on either side of the engine block and drain those (HALF of the coolant lies here!)
This thread helps in finding the two drain plugs on the block: (they area a real PITA) https://ls1tech.com/forums/generatio...k-coolant.html
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Verdad Gallardo Thread Starter
Teching In
Joined: Jul 2018
Posts: 3
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its the old metal radiator with plastic sides stock OEM 
and its running cool at 190 via my thermometer on dash so far.. I intend to take this truck to AZ so will have to put a bigger radiator in eventually any suggestions?
and its running cool at 190 via my thermometer on dash so far.. I intend to take this truck to AZ so will have to put a bigger radiator in eventually any suggestions?