Professional Quality Products
Coolant Problems in 2007-2008 Diesel Engines
Plugged Radiator Core
The 2007 and newer medium and heavy duty engines with the new emissions devices are creating new and potentially serious problems for cooling systems in general and coolants in particular.
With cooling loads increased by as much as 30% over the previous engines we are seeing issues that must be understood and addressed by users.
As trucks have become more aerodynamic the underhood area has been reduced and airflows restricted. At the same time we have larger displacement engines often with higher horsepower density, plus EGR systems recirculating greater volumes of very hot air together with other heat producing, exhaust restricting Emissions devices.
We have seen trucks with fiberglass hoods that have warped or melted from this tremendous heat load.
All of this places more heat into the coolant, and not only more heat, but higher average temperatures.
Many of todayís coolants are excellent products, however they need more monitoring and more maintenance than ever before.
In the past many fleet experts and OEMís would recommend an annual check of the coolant. Today these high loads can use up the additive package found in coolants in weeks rather than months. We have seen instances where coolant is properly checked and found to be in good condition, yet in less than a month it can be worthless.
We have seen coolant actually turn black, not from contamination, but simply from continuous high heat loads. Silicate drop out and gelling is more prevalent than ever before.
When this coolant begins to deteriorate the cooling system can be damaged very quickly. We are seeing radiators and heater cores that the solder has been eaten away by the coolant. We are seeing far more liner and even block cavitation problems than ever before.
As a result we have some suggestion and recommendations to try and protect your engines and cooling systems.
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Last modified: 04/06/09
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