1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

oil cooler replacement (i did search)

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Old 09-04-07, 12:35 AM
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oil cooler replacement (i did search)

My oil cooler is in need to replacement, and after a quick search on ebay, i've found several aftermarket oil coolers. Are any of you running any of these coolers? if so which ones? how big does a cooler need to be to satisfy our engines?
Old 09-04-07, 01:35 AM
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https://www.rx7club.com/showthread.p...ght=oil+cooler
Old 09-04-07, 12:55 PM
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Ok, well, i guess i should have been more specific. I do not want a used cooler, since they all look very rough and are probably in as bad of condition as the one I'm taking out. I want to buy a new one, probably aftermarket, and wanted advice on which one to buy. Has anyone had any experience with them? or am I the only one who has a pooched cooler? If i get one of these aftermarket ones, are their any concerns with hooking the lines up?
Old 09-04-07, 01:23 PM
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Most aftermarket oil coolers are not as good as the stock Mazda front mount units. Putting an aftermarket oil cooler on a rotary, usually results in much higher oil temps.
Old 09-04-07, 05:41 PM
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https://www.rx7club.com/1st-generation-specific-1979-1985-18/after-market-oil-coolers-613628/

NO! There is not an aftermarket oil cooler that compares with the capability of the stock RX-7 coolers.

Recommend that you get a used one and have it professionally cleaned. Or you could pop for the $500-$600 for a new one from Mazda. :-)
Old 09-04-07, 05:52 PM
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+1. Agreed. This was confirmed by my tech guy who runs a popular rotary shop on the East Coast. "The stock oil cooler does a far better job than any aftermarket one can do."

Face it. Even in 1985, the Japs knew what they were doing when they made this car.
Old 09-04-07, 08:17 PM
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Just do the 2nd Gen Oil cooler conversion, easy and bullet proof.
Old 09-04-07, 10:34 PM
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Agreed.

Every 2nd gen made,regardless of trim/type, had the same air/oil cooler and they abound in wrecking yards nowdays.The FC cooler is much less prone to cracking since the unions are banjo rather than flare/washer type.The rubber lines are still prone to leaking,but its cheap and easy to replace them.
Old 09-05-07, 01:32 AM
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what will I encounter when I install? is it a direct swap?
Old 09-05-07, 06:31 AM
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Here: https://www.rx7club.com/1st-gen-archive-71/cooling-oil-how-install-fc-oil-cooler-1st-gen-write-up-pics-478521/
Old 09-05-07, 01:12 PM
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sorry, I already have a FMOC off the GSLSE I swapped the engine from. Is it a direct swap with that one?
Old 09-05-07, 01:42 PM
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its not a direct swap. see this link https://www.rx7club.com/showthread.php?t=478521 (as posted above)
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