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coolant to run for a 6.1

kalaek

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Hey guys,
Does anyone know if the 6.1 hemi's require a specific type of coolant? or would the regular Prestone or Prime coolant work with that motor?
Thank you
 
Im with Stuart on this one as well, run 50/50 mix of regular "green" antifreeze, GM had a problem with the Dexcool eating away at gaskets and corroding the aluminum. run the good ol' green stuff!!!
 
run a phosfate free anti.phosfates are what eats at aluminum.(spelling is wrong on phosfate,i think lol)
 
considering Gm's have been aluminum and running dex cool for ever, there is a very small % of people having issues. We put dexcool in all the hemis. I do about 50 5.7/6.1 cars a year and in 5+ years never had a single issue.
 
considering Gm's have been aluminum and running dex cool for ever, there is a very small % of people having issues. We put dexcool in all the hemis. I do about 50 5.7/6.1 cars a year and in 5+ years never had a single issue.

google it , its a huge problem on all GM 3.1 , 3.4 , 3.8 s have serious problems from it and the dealers wont put the stuff beck in them now .
 
Exactly, I am ASE cert. tech and when a GM rep came he specifically stated this problem and this was 10 years ago! It's not a new problem!!
 
this is straight from chrysler. I just had an engine class last week, and we were told DO NOT USE DEX COOL IN CHRYSLER ENGINES!!!



ENGINE COOLANT

WARNING:Antifreeze is an ethylene-glycol base coolant and is harmful if swallowed or inhaled. If swallowed, drink two glasses of water and induce vomiting. If inhaled, move to fresh air area. Seek medical attention immediately. Do not store in open or unmarked containers. Wash skin and clothing thoroughly after coming in contact with ethylene-glycol. Keep out of reach of children. Dispose of glycol base coolant properly, contact your dealer or government agency for location of collection center in your area. Do not open a cooling system when the engine is at operating temperature or hot under pressure, personal injury can result. Avoid radiator cooling fan when engine compartment related service is performed, personal injury can result.
CAUTION:Use of Propylene-Glycol based coolants is not recommended, as they provide less freeze protection and less corrosion protection.
The cooling system is designed around the coolant. The coolant must accept heat from engine metal, in the cylinder head area near the exhaust valves and engine block. Then coolant carries the heat to the radiator where the tube/fin radiator can transfer the heat to the air.
The use of aluminum cylinder blocks, cylinder heads, and water pumps requires special corrosion protection. Mopar® Antifreeze/Coolant, 5 Year/100,000 Mile Formula (MS-9769), or the equivalent ethylene-glycol base coolant with organic corrosion inhibitors (called HOAT, for Hybrid Organic Additive Technology) is recommended. This coolant offers the best engine cooling without corrosion when mixed with 50% ethylene-glycol and 50% distilled water to obtain a freeze point of -37°C (-35°F). If it loses color or becomes contaminated, drain, flush, and replace with fresh properly mixed coolant solution.
CAUTION:Mopar® Antifreeze/Coolant, 5 Year/100,000 Mile Formula (MS-9769) may not be mixed with any other type of antifreeze. Mixing of coolants other than specified (non-HOAT or other HOAT) may result in engine damage that may not be covered under the new vehicle warranty, and decreased corrosion protection.


COOLANT PERFORMANCE

The required ethylene-glycol and water mixture depends upon climate and vehicle operating conditions. The coolant performance of various mixtures follows:
Pure Water- Water can absorb more heat than a mixture of water and ethylene-glycol. This is for purpose of heat transfer only. Water also freezes at a higher temperature and allows corrosion.
100 percent Ethylene-Glycol - The corrosion inhibiting additives in ethylene-glycol need the presence of water to dissolve. Without water, additives form deposits in system. These act as insulation causing temperature to rise to as high as 149°C (300°F). This temperature is hot enough to melt plastic. The increased temperature can result in sever engine damage. In addition, 100 percent ethylene-glycol freezes at -22°C (-8°F).
50/50 Ethylene-Glycol and Water - Is the recommended mixture, it provides protection against freezing to -37°C (-34°F). The antifreeze concentration must always be a minimum of 44 percent, year-round in all climates. If percentage is lower, engine parts may be eroded by cavitation. Maximum protection against freezing is provided with a 68 percent antifreeze concentration, which prevents freezing down to -67.7°C (-90°F). A higher percentage will freeze at a warmer temperature. Also, a higher percentage of antifreeze can cause the engine to overheat because specific heat of antifreeze is lower than that of water.
CAUTION:Richer antifreeze mixtures cannot be measured with normal field equipment and can cause problems associated with 100 percent ethylene-glycol.
 
100's and hundreds of performance build over the last 5 years we have been in business. Not a single issue on a LS motor or a hemi. That is good info, I understand why they post it, I don't know if we will change what we put in cars though until we have a problem.
 
google it , its a huge problem on all GM 3.1 , 3.4 , 3.8 s have serious problems from it and the dealers wont put the stuff beck in them now .
imo not really a good selection of engines to base off of. those engines are all junk anyways.
 
Your a riot man, I am a hardcore Mopar guy but a GM 3.8 is a damn good engine aside from the plastic intake problem, I have never ever seen any major problem with one and I work on cars for a living!! The 3.1 and 3.4 are trash heads will warp if you look at it wrong!! I just did head gaskets on a 04 3.4 last week!
 
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