Best way to fill the coolant after draining?

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SHO SPD

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I noticed when I drain all my antifreeze out from the lower radiator hose I go tto fill it back up it wont flow through theengine unless I get it hot, and shut the engine off, fill the resivoir back up after I hear the fliud flow into the engine, and do this like 3 times. What am I diong wrong? This is a pain in the ass...

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AutoXSHO

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The way I've done it (and which has never failed me):

Fill radiator and overflow bottle with 50/50. Squeeze top radiator hose, which will release air bubbles and draw more liquid in. Add liquid. Repeat until it won't take any more liquid. Run car with heater on. Check overflow bottle periodically to ensure it's at the proper height.

JV
 

sdpatt

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Because the thermostat doesn't open until the engine gets to operating temperature, there is no quick way to fill the coolant system completely after draining. Make sure there is plenty of coolant in the expansion bottle to let the engine suck in more coolant so it can top itself off after it cools down. This may take a couple of days before the system is water solid again. Check the expansion bottle level frequently.


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Scott
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[This message has been edited by sdpatt (edited 11-26-2001).]
 
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Tommy the Greek

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When I changed my radiator a couple of weeks ago, I refilled her up from the upper radiator hose.
Just take the upper radiator hose off the radiator and fill up the block via the hose.
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When the coolant started to come out of the upper radiator hole I knew she was filled.
(Make sure the lower radiator hose is connected the the radiator and block)

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sdpatt

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With the thermostat installed, the flow path in the upper radiator hose towards the engine is blocked by the closed thermostat. Only the jiggle valves will let a small trickle of water to pass into the block. How long does it take to fill that way?

Scott
 

Blast7

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This is how I always do it and it takes about 15-20 minutes. Fill up the radiator and recovery tank to their specified levels and leave the cap off. Start the car and let it run. Once it reaches a certain temperature then the thermostat opens up and you will see the level go down. Put your coolant water mixture in to fill it up to the top again. Keep the car running because it will cool down and then heat back up again making the level go back down. Fill it back up again and repeat. It usually take about 2-3 times for the thermostat to open and close before you are free of air bubbles. I have done this many times and never had a problem with having to add fluid anytime later. You might want to double check it though.

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faxon

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From what I gather, you need to "belch" the air bubbles out of the system. How do you know when you are finished? On VWs it's when the fan cycles 5 times. Is there some benchmark like that on the SHO?
Grazie
 

FordLover

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Originally posted by sdpatt:
With the thermostat installed, the flow path in the upper radiator hose towards the engine is blocked by the closed thermostat. Only the jiggle valves will let a small trickle of water to pass into the block. How long does it take to fill that way?

Scott

Unless your thermostat is stuck open, right =)
-Martin



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Blast7

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Originally posted by faxon:
From what I gather, you need to "belch" the air bubbles out of the system. How do you know when you are finished? On VWs it's when the fan cycles 5 times. Is there some benchmark like that on the SHO?
Grazie

Yes, after the 3rd time it should be all set.


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1991 Black MTX
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PP Motor Mounts
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Blazer Tech Fogs
Want to Buy:
~1st Gen Black rust free trunklid
~1st Gen Black rust free front door mouldings
 
T

Tommy the Greek

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Originally posted by sdpatt:
With the thermostat installed, the flow path in the upper radiator hose towards the engine is blocked by the closed thermostat. Only the jiggle valves will let a small trickle of water to pass into the block. How long does it take to fill that way?

Scott

It took about 5 minutes. I hope my thermostat is not stuck open. hmmmmmm
 

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