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New Edge Cobras
Intermittent Temp Increase - Diagnosis
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<blockquote data-quote="kzite29" data-source="post: 16483278" data-attributes="member: 186342"><p>Wow, thanks for all the responses guys!</p><p></p><p>I've had the car since 2017 and been on half a dozen drives of 15+ hours, so it likely isn't an old stop-leak buildup.</p><p>I remanned the oil cooler this spring and did a full coolant flush (the long/correct way) when I put that back on. Coolant is still spotless after 6 months so I'm not thinking there's a "clog" per se from debris but maybe some bend or other restriction in coolant flow.</p><p></p><p>Fan is good. Hoses are good. Radiator has some dings in the fins, but I feel like an air flow issue probably have the opposite of "highway only" appearances. Might just go over to a Mishimoto anyway as insurance for auto-x.</p><p></p><p>Thinking about the Cats, wouldn't that throw me an emissions code? I know these cars aren't too "emissions sensitive" but I thought usually some DTC comes out of unwanted backpressure especially from the converters. Maybe this is a good excuse to grab me a new H-pipe anyway!</p><p></p><p>I did burp it extensively when I reassembled everything, but maybe the old rad cap was letting a bit of air in the system, been burping the past 2 monrings since discovering this issue and not getting much of a difference, maybe 1oz of coolant add.</p><p></p><p>Not sure what the best way to diagnose the water pump would be given that it's cooling fine at idle. Definitely open to recommendations here! It has a slightly larger pulley on it from the Steeda kit, hasn't given me issues in the past but maybe this is contributing?</p><p></p><p>I'll burp one more day and update you guys. If that fails, start with a new thermostat (probably grab a Motorcraft from dealer unless you guys have other recommendations) and see if I can pour some water through the radiator to "flow test" it while I have the coolant out.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="kzite29, post: 16483278, member: 186342"] Wow, thanks for all the responses guys! I've had the car since 2017 and been on half a dozen drives of 15+ hours, so it likely isn't an old stop-leak buildup. I remanned the oil cooler this spring and did a full coolant flush (the long/correct way) when I put that back on. Coolant is still spotless after 6 months so I'm not thinking there's a "clog" per se from debris but maybe some bend or other restriction in coolant flow. Fan is good. Hoses are good. Radiator has some dings in the fins, but I feel like an air flow issue probably have the opposite of "highway only" appearances. Might just go over to a Mishimoto anyway as insurance for auto-x. Thinking about the Cats, wouldn't that throw me an emissions code? I know these cars aren't too "emissions sensitive" but I thought usually some DTC comes out of unwanted backpressure especially from the converters. Maybe this is a good excuse to grab me a new H-pipe anyway! I did burp it extensively when I reassembled everything, but maybe the old rad cap was letting a bit of air in the system, been burping the past 2 monrings since discovering this issue and not getting much of a difference, maybe 1oz of coolant add. Not sure what the best way to diagnose the water pump would be given that it's cooling fine at idle. Definitely open to recommendations here! It has a slightly larger pulley on it from the Steeda kit, hasn't given me issues in the past but maybe this is contributing? I'll burp one more day and update you guys. If that fails, start with a new thermostat (probably grab a Motorcraft from dealer unless you guys have other recommendations) and see if I can pour some water through the radiator to "flow test" it while I have the coolant out. Cheers. [/QUOTE]
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