Coolant overflowing

HANA[AA8582

MEMBER
TOYOTA PICKUP

Hi:
I have a 1990 Toyota 4wd pickup 5 speed trans with a 22 RE engine that has 168000 miles on it. I recently started having a problem. What s happening is as I drive the coolant is going into the overflow tank and spilling out but it wont go back into the radiator on it's own like the coolant recovery system should work. There is no water in the oil and the coolant is still a nice green color. No smoke out of the exhaust and the tempereture only comes up to about 1/4 on the guage even when driving uphill. It has a new thermostat and radiator cap and the radiator is only a year old. I did have the timing cover and chain replaced about a year ago because the chain wore a hole into the cover and the coolant was leaking into the oil. I am at a loss as to what the problem could be. Any help would be really appreciated.
Thanks
JC

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

You need to have it block/pressure tested to identify what's causing it-

Try bleeding it follow below:

BLEEDING COOLING SYSTEM

Always bleed air from cooling system after replacing coolant. Set heater for maximum heat. Remove radiator cap. Loosen drain plug and remove drain bolt (if equipped) from engine block. Drain coolant reservoir. Fill coolant reservoir to MAX mark with 50/50 water-coolant mixture. Loosen bleed bolt and fill radiator up to base of filler neck. Close bleed bolt when coolant flows out without bubbles. Tighten bleed bolt. With radiator cap removed, start and operate engine to normal operating temperature. Add coolant if necessary and check for leaks.