Step 1: Jack your Nissan pickup up and drain the coolant. Step 2: Locate the sensor on the intake manifold and remove the electrical wire connector attached to it. Step 3: Remove the old coolant temperature sensor and install the new one. Step 4: Reconnect the electrical connector and refill the cooling system. An increase in the oil level is also a sign that the coolant is leaking into the oil. If the level of the coolant in the overflow tank is below the cold-low mark, you can suspect coolant is leaking. However, a small coolant leak into the lubrication system may take time to contaminate the engine oil and may not be obvious at first. While some of you might’ve been surprised at our listing the oil cooler as the 6.0L Power Stroke’s biggest problem in Part 1, none of you will be surprised with its runner-up issue: the exhaust gas recirculation (EGR) system. From a stuck EGR valve to a plugged or leaking EGR cooler to overtaxed engine coolant, the 6.0L is a hot mess in If this cooler fails or the coolant passages become clogged (a common occurrence on the 6.0L), it may reduce flow to the EGR cooler, or create a sludgy oil/coolant mix that won’t flow through the cooler. If your engine has fuel issues, it can increase the amount of soot in the exhaust which will then coat and often plug your EGR cooler

EGR is exhaust gas recirculation. So yes a leaking egr cooler can contaminate your oil with antifreeze.When an EGR cooler is leaking it is releasing antifreeze into the exhaust flow recirculating back thru the engine, that is how antifreeze is showing up in your oil analysis.

Finally, that upsets the balance and the result can be, the engine having some problems. Check (EGR) Valve. So, a stuck open (EGR) valve, will create a lack of oxygen in the exhaust. Because, the recirculating exhaust, has all its oxygen already burnt. Furthermore, the (ECM) sometimes uses, the (O2) oxygen sensor to check for proper (EGR
Cons of an EGR Valve . When the EGR valve goes bad, it must be replaced. Unlike some emissions control devices that can go bad without affecting the drivability of the car or truck, a bad EGR valve can really affect the engine's performance or even cause it to stop running altogether. The good news is you can clean it. 7dRve28.
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    • can a bad egr valve cause oil leak