360 Is this oil in coolant reservoir - possible heat exchanger failure

You could easily have some minor combustion trails in the coolant. It is a working machine after all. What I see in your photos is no indication of failure.

Lastly with the failure that you must be thinking of (heat exchanger below the intake) the coolant traces would be seen clearly in the transaxle fluid - more so than in the coolant reservoir.

 

Michael has it right. Check the fluid in the transaxle. Any leak will be VERY obvious there.

 

If your gear oil is contaminated ? you should flush your gear box with auto trans fluid it took me four times to get it clear. And then drove it for 100 miles and flushed it again. I use Mobil gear oil just asking why do you think Redline is better ?

 

Personally, I think it should be changed every year anyway. Two reasons: 1) you detect any leakage in the heat exchanger 2) the transaxle sits directly between the cats and it cooks the oil. Over 2 years you can easily notice degradation in the oil by how the car shifts.

Randy, I have always liked Redline but there are others I would consider. Why? The car shifts well and it holds up better in harsh conditions than Mobile. At least that was my experience with motorcycles where you can really feel and tell the difference. The oil subject has many VERY LONG threads on it; not that they ever reach a conclusion (they don't).

 

Agree. I change my transaxle fluid annually. I used to do coolant every year, too, but when I realized I could detect heat exchanger failed in the transaxle fluid, went to every other year. The anti corrosion additives in coolant used to wear out more easily, but modern coolants last at least two years.


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Affirmative, even Zerex G05 went to nitrited HOATs this year instead of nitrited IATs in the old formulation.

 

Be careful with redline shockproof. It is not recommended for use in transmissions with external coolers as it has an emulsion additive which potentially bungs up the coolant lines and cooler. Redline 75w90NS is the only one to use if going with redline brand. The "NS" is not the same formula as shockproof as it does not have the emulsion. From their shockproof product info "Avoid use with pumps, coolers, and filters as unique medium and affinity for metal can cause clogging" The 360 transmission has a pump, filter and cooler.

 

it is not adversiable to use shockproff. not because the oil itself isn't good, but because with shockproof it is not very easy to identify a bad oil when using the gearbox oil dipstick to see if the oil is contaminated with coolant. Personal experience.

it is blue-ish. Unless you use red coolant, of course. Even red coolant mixed with shockproof will give you not-so-easily-identifiable color.

 

24000rpm did you order a roll bar for your 360 ??

 

what roll bar? The suspension roll bar or the bar behind the seats just in case of something crush the car from above?