early style cooling system?
#1
*reallly knowing the fc
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: May 2007
Location: victory lane
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
early style cooling system?
normally i like to think i know everything about the fc but in this case ill admit that just isn't true. and i briefly searched the fsm for this but found nothing. my friend just got an 86. it has the small d.s. fender mounted coolant overflow bottle. on the top of the radiator there is a nipple where normally there is just the coolant level sensor. this nipple has a coolant level sensor wire soldered into it. the nipple feeds into a fitting with a radiator cap next to the p.s headlight, where the large overflow bottle is usually located. the hose then goes to the small overflow tank. anybody seen this before?
#2
Moderator
![](/images/misc/20_year_icon.png)
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,993
Received 2,691 Likes
on
1,905 Posts
yep. the first cars had the overflow coming from the cap on the engine, and then to the small tank on the shock tower.
this didn't work so mazda had a kit to fix it. it has the weird coolant level sensor, and the pressure cap on the bracket by the bumper
this didn't work so mazda had a kit to fix it. it has the weird coolant level sensor, and the pressure cap on the bracket by the bumper
#3
Rotary Enthusiast
![](https://www.rx7club.com/images/misc/15_year_icon.png)
iTrader: (66)
Join Date: Aug 2006
Location: where the wild things roam
Posts: 889
Likes: 0
Received 0 Likes
on
0 Posts
does anyone have any pics of an engine compartment with this mounted? I recently acquired one new old stock pieces and not sure if i'm going to install but am curious how it mounts. If anyone else is interested in one of these pm me and i can tell you where to find them for $21 shipped.
#5
Rotary Enthusiast
![](https://www.rx7club.com/images/misc/15_year_icon.png)
iTrader: (66)
Join Date: Aug 2006
Location: where the wild things roam
Posts: 889
Likes: 0
Received 0 Likes
on
0 Posts
ok, j5sense, now you got me confused because the coolant bottle installed in my fc looks like the one in the diagrams but I don't have that "extra" radiator cap assembly. The recent "nos" "early version"coolant bottle I purchased is this http://www.ebay.com/itm/190566099078...84.m1497.l2649
just for the record the fc I'm referring to is an 86 gxl (not sure of the exact build date offhand). It does have the early version p.steering pump though so I think its relatively early.
just for the record the fc I'm referring to is an 86 gxl (not sure of the exact build date offhand). It does have the early version p.steering pump though so I think its relatively early.
#6
Moderator
![](/images/misc/20_year_icon.png)
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,993
Received 2,691 Likes
on
1,905 Posts
ok, j5sense, now you got me confused because the coolant bottle installed in my fc looks like the one in the diagrams but I don't have that "extra" radiator cap assembly. The recent "nos" "early version"coolant bottle I purchased is this http://www.ebay.com/itm/190566099078...84.m1497.l2649
just for the record the fc I'm referring to is an 86 gxl (not sure of the exact build date offhand). It does have the early version p.steering pump though so I think its relatively early.
just for the record the fc I'm referring to is an 86 gxl (not sure of the exact build date offhand). It does have the early version p.steering pump though so I think its relatively early.
the early system has the overflow you just bought, and the cap is on the thermostat.
the next system they moved the coolant bottle to the front, this happened late in the 86 model year
then there was that overflow kit thing we're posting pics of, it retrofits everything prior
then they added a cap on the radiator for the 88 model year. i think the radiator then gets the overflow, and the cap on the engine is just a filler?
and then S5 changes again, but it seems to work so S5 are all the same.
so the coolant bottle moves to the front pretty quickly. parts fish shows after vin 129445
Trending Topics
#12
Senior Member
iTrader: (2)
Join Date: Apr 2010
Location: Michigan
Posts: 258
Likes: 0
Received 0 Likes
on
0 Posts
I know Im gravedigging a little, but I'd rather bump this thread instead of starting a new one. I have the early style radiator with no pressure cap and the overflow tube by the coolant level sensor, and no overflow tube by the thermostat. Should I have a flat cap by the thermostat and a pressure cap on the small tank by the PS headlight? Is there another way to run my coolant system so I dont have to have the extra tank next to the PS headlight or am I stuck with it since I have an early radiator? Thanks guys
Thread
Thread Starter
Forum
Replies
Last Post
SakeBomb Garage
Group Buy & Product Dev. FD RX-7
8
10-09-15 10:05 PM
rx8volks
Canadian Forum
0
09-01-15 10:46 PM