Rahl Posted January 12, 2021 Report Share Posted January 12, 2021 What is the back reservoir and at what level should it be? Noticed spilled coolant on the sides of the bottle and below. Was wondering if the CAI was messing with it. Also included picture of the front reservoir. I know it’s level isn’t supposed to be below 1 inch of the seam line Quote Link to comment Share on other sites More sharing options...
Solution agentdr8 Posted January 12, 2021 Solution Report Share Posted January 12, 2021 The back reservoir is the cooling system header tank. I believe the level when cold should be about 10mm below the seam, and no more than 25mm below the seam. Any more than that and there's the potential for coolant to be expelled when the system is hot, as there's no room left to expand. The front reservoir is for your charge cooler, and its max level is indicated by the line on the RHS. 1 1 Quote Link to comment Share on other sites More sharing options...
Rahl Posted January 31, 2021 Author Report Share Posted January 31, 2021 Took the car to the dealership for oil change and to check coolant reservoirs. Turned out to be a leaking cap on the Charge Cooler Coolant Reservoir. They said it heats up the plastic cap and makes it leak when driving. A known problem. Recommended I replace with an aluminum cap. They put some sealant on it as a temp fix. Quote Link to comment Share on other sites More sharing options...
steve930 Posted January 31, 2021 Report Share Posted January 31, 2021 On the launch year of the 400 lotus used an alloy tank with alloy lid.. I guess they changed to plastic for cost cutting! 1 Quote Link to comment Share on other sites More sharing options...
steve930 Posted January 31, 2021 Report Share Posted January 31, 2021 Quote Link to comment Share on other sites More sharing options...
Rahl Posted January 31, 2021 Author Report Share Posted January 31, 2021 What the f....... hahaha. That would have been nice too have instead of an engine bay full of leaked dried on coolant. 1 Quote Link to comment Share on other sites More sharing options...
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