2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

coolent leak possibly

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Old Aug 29, 2008 | 06:36 PM
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From: sioux falls sd
coolent leak possibly

i might got a coolent leak

if the coolent is smokeing back out to the stored coolent is that bad?
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Old Aug 29, 2008 | 07:23 PM
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Into the coolant overflow bottle?
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Old Aug 30, 2008 | 09:56 AM
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You will do yourself a huge favor by reading up on common problems with these cars as well as searching specifically for the problems you're having. I did that before I ever bought my first RX-7 and it helped me out a ton, I was able to jump right in with a pretty good idea of what I was getting into. Read the 2nd gen FAQ as well as stuff here:
http://www.rotorwiki.com/index.php/2...ion_RX-7_(FC3S)
http://www.rotaryresurrection.com/2ndgen/techmenu.html
http://aaroncake.net/RX-7/

There's more material out there, too, I'm just trying to give you a place to start.
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Old Aug 30, 2008 | 10:49 AM
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Please try and form actual sentences complete with information we can use to help you problem.

I'm guessing that you are referring to coolant entering the overflow bottle and not being sucked back into the engine?

If so, then a normal cause is a pinhole leak on the hose from the rad cap to the bottle.

Seriously though, a bit of information is needed to make a determination.
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Old Aug 31, 2008 | 04:02 AM
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From: sioux falls sd
yea the overflow tank is fillin up wit the hose blowing coolent in it and isnt suking it
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Old Aug 31, 2008 | 04:46 AM
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So are you saying that as the coolant moves into the overflow bottle that it's boiling? Does the coolant smell like exhaust fumes?

If that's the case, then you're most likely looking at blown coolant seal = engine rebuild. Its common on FC's & there's a heap of info on these forums on how to diagnose this problem.

I had those symptoms on my S5TII and it turned out to be that the front plate had corroded, allowing coolant to enter the combustion chamber and exhaust gasses to enter the cooling system.

Cheers,
- TT
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Old Aug 31, 2008 | 11:24 AM
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Before assuming it's the engine, swap the pressure cap and hose to the overflow bottle. If those don't correct the problem, then pressure test the cooling system to determine if the leak is internal or external.
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Old Sep 1, 2008 | 01:27 PM
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From: sioux falls sd
well it dont burn coolent anymore but it can never get enough coolent going through the car plus the coolent does boil and doesnt really smell like anything i felt the boiled coolent wasnt that hot but still something to be worried bout and my car would overheat to like 3/4 most of the time.
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Old Sep 1, 2008 | 07:18 PM
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i had the same problem, you might have a leak somewhere or the waterpump is not working well. if anything your radiator can be clogged you might wanna replace that. so does it overheat?



Originally Posted by fdrefic
well it dont burn coolent anymore but it can never get enough coolent going through the car plus the coolent does boil and doesnt really smell like anything i felt the boiled coolent wasnt that hot but still something to be worried bout and my car would overheat to like 3/4 most of the time.
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Old Sep 1, 2008 | 09:29 PM
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From: sioux falls sd
yes all the time now it overheats by the 3/4 line and basically once it hit up the tip of the line and i just directly went home and keep the car off the whole day i am going to just replace the spark wires and plugs full sets is fukin 80 dollers and i will be checking the pump soon too
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Old Sep 2, 2008 | 03:03 PM
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Any small leak will make the coolant boil. If you can't find the leak, try using a dye kit.

By the way, if you keep overheating the car like that, you'll be replacing the engine soon. If you know the car is overheating, then don't drive it until the problem is fixed.
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Old Sep 2, 2008 | 03:41 PM
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From: sioux falls sd
wats a dy kit anyways and how much would it really cost?
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Old Sep 3, 2008 | 09:24 AM
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Please do not bump your posts. The rules are clear in that bumps are not allowed.

A dye kit is a fluorescent dye that gets placed in the cooling system. You then run the car and use a UV light (usually included in the kit) to look for the brightly coloured leak. These are available at most auto parts stores for under $100.
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