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Old 04-08-2009, 09:06 PM
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Join Date: Mar 2009
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Default Coolant Additive / Bars Stop Leak

The cadillac 4.1, 4.5, and 4.9 engines call for the GM tabs. Is this also true for the Northstar?

I am interested to know if these tabs are prone to restricting heatercore flow. I did a coolant system flush last year and added the tabs. My 4.5 cadillac heat warms up the car but doesn't get piping hot like the newer cars. In the winter I run the heat at 90 degrees max setting to stay warm, never having to move the temp down. Do these cars just don't produce heat that's piping hot?

Is it a common thing to have to reverse flush the heatercores on these motors?
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Old 11-05-2009, 08:30 AM
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Quote:
Originally Posted by Keys85 View Post

The cadillac 4.1, 4.5, and 4.9 engines call for the GM tabs. Is this also true for the Northstar?

I am interested to know if these tabs are prone to restricting heatercore flow. I did a coolant system flush last year and added the tabs. My 4.5 cadillac heat warms up the car but doesn't get piping hot like the newer cars. In the winter I run the heat at 90 degrees max setting to stay warm, never having to move the temp down. Do these cars just don't produce heat that's piping hot?

Is it a common thing to have to reverse flush the heatercores on these motors?
1. yes
2. maybe, if not used properly
3. maybe if #2 applies

.
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Old 11-05-2009, 08:30 AM
 
 
 
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additive, additivesbars, bars, cadillac, change, coolant, cooling, flush, gm, leak, northstar, radiator, reverse, stop, xlr


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