NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   weird overheating (https://www.nopistons.com/2nd-generation-specific-17/weird-overheating-65696/)

Leetheslacker 05-09-2007 03:07 PM

so on the way home from the track yesterday, car starts acting up.



at speed, the temp gauge jsut rises slowly up to h. if i pull off and let it sit and idle it cools right back down. but as soon as i get going again it starts overheating.



I pulled the bumper off and it seemed like it went away completely.

It makes me think i need ducting, but its never ran hot anywhere at all before now, even on real real hot days.



any ideas besides duct the **** out of it and maybe cut the bumper? just wondering if some componant failing causes the same symptoms, just in case its not jsut ducting.

j9fd3s 05-09-2007 03:31 PM

maybe the rad is plugged?

Leetheslacker 05-09-2007 03:39 PM

dunno, had no undertray.



just put it back on a minute ago

fcs13 05-09-2007 04:35 PM

need new thermostat? check sending unit connection?

needa86NAat 05-09-2007 05:49 PM

check the clutch fan too! For added help drain ALL the coolant out, and run 2 bottles REDLINE water wetter and straight water. It noticably dropped my temp.

Leetheslacker 05-10-2007 12:32 AM

have an taurs fan, wire it to high halfway home to see if it helps.



already have water wetter and mostly water.



i think it was just not having the undertray, all the air went through the ic and then under the car. its back on now, ill have to ziptie the bumper back on and take it for a spin. the s4 bumper opening is just not big enough to let enough air through.

fc3s4utnv 05-11-2007 11:20 PM

loose belt mine does it all the time,

teknics 05-12-2007 11:23 AM

yea possible loose belt, possibly ducting. remember lee, now your coolant also has to go through the turbo so its getting hotter then it used to.



kevin.

Leetheslacker 05-12-2007 11:57 AM


Originally Posted by teknics' post='871560' date='May 12 2007, 12:23 PM

yea possible loose belt, possibly ducting. remember lee, now your coolant also has to go through the turbo so its getting hotter then it used to.



kevin.





yeah but, ive been driving it a few weeks now, and this was my second drive to and from the track, atleast an hour drive there and back, and its never gotten hot ever before.

teknics 05-12-2007 05:06 PM


Originally Posted by Leetheslacker' post='871561' date='May 12 2007, 12:57 PM

yeah but, ive been driving it a few weeks now, and this was my second drive to and from the track, atleast an hour drive there and back, and its never gotten hot ever before.



oh sure, now you decide to be descriptive.



kevin.

j9fd3s 05-12-2007 07:34 PM


Originally Posted by teknics' post='871589' date='May 12 2007, 03:06 PM

oh sure, now you decide to be descriptive.



kevin.

https://www.nopistons.com/forums/pub...1047683785.gif

Leetheslacker 05-13-2007 01:49 AM

i think my rear rotor decided it and the apex seals didnt want to be friends anymore.



2nd gear pull, let off, coast down, turn into my street. ****. its idling like ****. get it up the driveway. idles like ****, revs like ****. all lopey and bleh.



tried pulling plug wires to see if anything happened.



besides absolutely shocking the **** out of myself more then a few times.

it seems like pulling the rears doesnt do anything, and it died when i pulled both fronts.



oh boy. this blows. now whered i put this compression tester.



also, the thing does nottttt want to start. but like, it seems like my batterys dead. everything dims and it jsut chugs along real slow.

Leetheslacker 05-13-2007 01:56 AM

and it was acting weird before that too.



id come to a stop with it in neutral, and when it got ot idle all the lights dimmed to off and the car would die. then id have to jiggle the pos terminal cable and start it abck up. happened a few times. related? maybe?



also, at idle it used to sit at -15 to -20 vac, now it bounces all around -10. damnit.

GreyGT-C 05-13-2007 02:14 AM

sounds like you have multiple problems going on.



Fix the loose battery connections first then see what the car does.....





Overheating can DEFINATELY be a fucked up ducting issue. To me, that is the most important thing on a rotary car.

hsmidy 05-13-2007 03:28 AM

i had a similar problem, long story short turned out to be the batery causing it all, check ya batery out load test it and check ya eletroyite levels etc, change my battery in the end and the over heating etc all went away

vosko 05-13-2007 09:20 AM

if you have a charging issue it will not fire the coils all the time..

Leetheslacker 05-13-2007 01:34 PM


Originally Posted by vosko' post='871652' date='May 13 2007, 10:20 AM

if you have a charging issue it will not fire the coils all the time..





yeah, but each plug wire shocked the **** out of me equally. although i really hope its not sploded.

Leetheslacker 05-13-2007 08:39 PM

its done.



pulled the plugs and cranked it from the front pully nut.



front made nice wooshes.



read has 1 nice woosh and some half ass pssss's.

vosko 05-13-2007 09:54 PM

she's gone from suck to blow!

j9fd3s 05-14-2007 09:50 AM

blast! damn infernal auto-moe-bile

teknics 05-15-2007 08:04 PM

hey hey hey goodbye....



at least you live close to kevin landers.



kevin.

inanimate_object 05-16-2007 04:25 AM

Probably not an air pocket but it's an easy check, if the whole of the rad isn't hot that's how you'll know.

Leetheslacker 05-16-2007 06:07 PM


Originally Posted by teknics' post='871925' date='May 15 2007, 09:04 PM

hey hey hey goodbye....



at least you live close to kevin landers.



kevin.





hes not taking any work at the moment i dont think.



plus it had o blow after a big i spend a bunch of money.



turns otu crazy guy down the street from me has a turbo motor with like 40k on it sitting around.

sitting for a year or two, but he said he fogged it and kept it wrapped up cause he put a streetported motor in his car instead.

if thats any good then ill throw a na flywheel on it and be back in business.



if not, i got a few other leads on other used motors. meh.

Leetheslacker 05-16-2007 06:09 PM

oh and i forgot, putting the rear tray back on fixed the overheating.

Leetheslacker 05-16-2007 08:30 PM

crazy guys motor down the street, looks good. nice compression all around, clean, good shape.



its been sitting with the flywheel and front main pully loose.



any way i can check the torringitrontgintgitgn bearing that can drop witht he pully loose with the oilpan off from the bottom? or do i have to tear into the front cover?

teknics 05-17-2007 08:34 AM

i think colin told me with the counterweight on the front in the just right position you can see if the torrington bearings are where they're supposed to be.



BTW you can get great deals on recently rebuilt but barely used motors, I've bought 3 in the past year or less, most expensive one was $1500, and they all have perfect compression and tons of work done to them.



kevin.


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