Page 208 of 386
Downloaded from www.Manualslib.com manuals search engine Cooling System
When you decide it’s safe to lift the hood, here’s what
you’ll see on the
LT1 engine:
1. Coolant recovery tank
2. Coolant high fill reservoir with pressure cap
3. Electric engine fans
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Page 209 of 386
Downloaded from www.Manualslib.com manuals search engine If the coolant inside the coolant recovery tank is boiling,
don’t do anything else until it cools down.
When you decide it’s safe to lift the hood, here’s what
you’ll see on the LT5 engine:
1. Coolant recovery tank
2. Coolant high fill reservoir with pressure cap
3. Electric engine fans
When it
is cool, remove the coolant recovery tank cap
and
look at the dipstick.
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Page 210 of 386
Downloaded from www.Manualslib.com manuals search engine The coolant level should be at or above COLD. If it
isn’t, you may have a leak in the radiator hoses, heater
hoses, radiator, water pump or somewhere else in the
cooling system.
NOTICE:
Engine damage from running your engine
without coolant isn’t covered by your warranty.
If there seems to be no leak, with the engine on check to
see if the electric engine fan(s) are running.
If the engine
is overheating, both fan(s) should be running. If they
aren’t, your vehicle needs service.
How to Add Coolant to the Coolant
Recovery Tank
If you haven’t found a problem yet, but the ,coo,lant level
isn’t at or above the COLD mark, add
a 50MI mixture
of clean water (preferably distilled) and a proper
antifreeze at the coolant recovery tank. (%e “Engine
Coolant” in the Index for more information about the
proper coolant mix.)
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Page 211 of 386
Downloaded from www.Manualslib.com manuals search engine In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts. Use
the recommended coolant.
When the coolant in the coolant recovery tank is at or
above the
COLD mark, start your vehicle.
If the overheat warning continues, there's one more
thing you can try.
You can add the proper coolant mix
directly to the coolant high fill reservoir, but be sure the
cooling system
is cool before you do it.
Page 213 of 386
Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Coolant High
Fill Reservoir
(5.7L LT5 (Code J) Engine)
2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
1. You can remove the coolant high fill reservoir
pressure cap when the cooling system, including the
coolant high fill reservoir pressure cap and upper
radiator hose, is no longer hot. Turn the pressure cap
slowly to the left until it first stops. (Don’t press
down while turning the pressure cap.)
If you hear a
hiss, wait for that to stop. A hiss means
there is still
some pressure left.
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Page 214 of 386
Downloaded from www.Manualslib.com manuals search engine 3. Fill the coolant high fill reservoir with the proper
mix,
up to the base of the filler neck.
4. Then fill the coolant recovery tank to the HOT mark
on the dipstick.
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Page 215 of 386
Downloaded from www.Manualslib.com manuals search engine 5. Put the cap back on the coolant recovery tank, but
leave the coolant high fill reservoir pressure cap off. 6.
7.
Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine fans.
By this time the coolant level inside the coolant high
fill reservoir filler neck
may be lower. If the level is
lower, add more
of the proper mix through the filler
neck until the level reaches the base of the filler
neck.
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Page 216 of 386
Downloaded from www.Manualslib.com manuals search engine 8. Shut the engine off and replace the pressure cap. At
any time during this procedure if coolant begins to
flow out of the filler neck, reinstall the pressure cap.
Be sure the arrows on the pressure cap line up like
this.
How to Add Coolant to the Coolant High
Fill Reservoir -- LTl Only
NOTICE:
The LT1 Engine (Code P) has a specific coolant
high fill reservoir fill procedure. Failure t,o follow
this procedure could cause your engine to
overheat and be severely damaged.
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