Help with overheating
#1
White 88' FC S4.5
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: Oct 2004
Location: El Cajon, CA
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
Help with overheating
A few months ago, I put a new aluminum koyo radiator on my car. I installed it, and for awhile it was leaking coolant past the hose clamps. I fixed that up, and now I'm at the point where I'm not even getting drips, but I start the car and the stock temperature gauge climbs to H without stopping until I shut the car down before it gets too hot. I'm running it at idle with me revving it occasionally. After I shut the car down and investigate under the hood I hear what sounds like boiling coolant hissing in the coolant filler pipe under the cap.
As a side note, I have the plastic undertray off right now.
I have a few things I think it might be..
It could be the thermostat, what prompted me to get the new radiator was a pretty bad overheating that luckily didn't damage the car, but I don't know if the extreme temperatures damaged the wax or whatever in the thermostat.
Another possibility is that coolant isn't flowing because I have a 50-50 mix of coolant and water and the water in my coolant pipe is clear with no green in it.
I searched the boards but couldn't find any relevant info.
I'm pretty familiar with my car, but I'm not that familiar with cooling issues so if anyone knowledgeable has any suggestions I would greatly appreciate it.
If you need more info about things, please ask me.
I have spring break this week with lots of time to repair the car and I want to get my it running again so i can smog it and get it going for summer.
Thanks, TW
As a side note, I have the plastic undertray off right now.
I have a few things I think it might be..
It could be the thermostat, what prompted me to get the new radiator was a pretty bad overheating that luckily didn't damage the car, but I don't know if the extreme temperatures damaged the wax or whatever in the thermostat.
Another possibility is that coolant isn't flowing because I have a 50-50 mix of coolant and water and the water in my coolant pipe is clear with no green in it.
I searched the boards but couldn't find any relevant info.
I'm pretty familiar with my car, but I'm not that familiar with cooling issues so if anyone knowledgeable has any suggestions I would greatly appreciate it.
If you need more info about things, please ask me.
I have spring break this week with lots of time to repair the car and I want to get my it running again so i can smog it and get it going for summer.
Thanks, TW
#4
White 88' FC S4.5
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: Oct 2004
Location: El Cajon, CA
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
It was the thermostat. Many thanks to polito.
I was able to get it on the road again, and I was able to install my new intake as a bonus.
Now hopefully I pass the smog and I'll be good to go.
I was able to get it on the road again, and I was able to install my new intake as a bonus.
Now hopefully I pass the smog and I'll be good to go.
#6
White 88' FC S4.5
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: Oct 2004
Location: El Cajon, CA
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
Went to rusty's today to get my smog check.
Results:
Emissions: PASS, running VERY clean.
Visual: PASS
Functional: EGR broken, fail
So now I have to go in there and pull off my plenum , find an EGR and replace it.
The mechanic admitted to me that the EGR doesn't do much in a rotary and that it's a BS california law thing, in addition to the car running very clean for a rotary.
Anyone know where to start looking for an EGR? I checked mazdatrix and they don't carry them.
Anyone done this job before and have any advice or cautions for me?
Thanks, TW
P.S. I hate california
Results:
Emissions: PASS, running VERY clean.
Visual: PASS
Functional: EGR broken, fail
So now I have to go in there and pull off my plenum , find an EGR and replace it.
The mechanic admitted to me that the EGR doesn't do much in a rotary and that it's a BS california law thing, in addition to the car running very clean for a rotary.
Anyone know where to start looking for an EGR? I checked mazdatrix and they don't carry them.
Anyone done this job before and have any advice or cautions for me?
Thanks, TW
P.S. I hate california
Thread
Thread Starter
Forum
Replies
Last Post
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM
erevos
2nd Generation Specific (1986-1992)
4
09-15-15 09:19 AM