New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

Overheating

Thread Tools
 
Search this Thread
 
Old 02-18-16, 03:35 PM
  #1  
Junior Member
Thread Starter
 
tarzanarzt's Avatar
 
Join Date: Feb 2016
Location: Maryland
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Overheating

I'm currently having some difficulties trying to get my cooling system up and running. When I had bought the car, the guy mentioned it had a radiator that needed replacing. I didn't think much of it and bought a new radiator and thermostat and threw put it all together. When I took the car for a test drive it lost heat from the fans and started overheating and when I opened the hood it was pushing out of the thermostat cap. The hose to the radiator was very firm and it was trying to pump fluid into the reservoir. I thought maybe it was the water pump but I took it off to inspect it, and the water pump is in great condition. I checked the thermostat in boiling water and it opened up fine. I even checked the heater core to see if there was a blockage but it had flow going in both directions. Can someone please help me? I'm not entirely sure where to go from here
Old 02-18-16, 04:34 PM
  #2  
Junior Member

iTrader: (3)
 
PeterFd's Avatar
 
Join Date: May 2013
Location: California
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Did you try leaving the radiator cap off.
And start up your car. If you see coolant shoot out of it or bubble.
Old 02-18-16, 04:53 PM
  #3  
Retired Moderator, RIP

iTrader: (142)
 
misterstyx69's Avatar
 
Join Date: Sep 2005
Location: Smiths Falls.(near Ottawa!.Mapquest IT!)
Posts: 25,581
Likes: 0
Received 131 Likes on 114 Posts
I think you got snookered and bought a car with a bad engine.

If you test the cooling system with it full cap off and it shoots coolant out then you need a rebuild.
Old 02-18-16, 05:56 PM
  #4  
Junior Member
Thread Starter
 
tarzanarzt's Avatar
 
Join Date: Feb 2016
Location: Maryland
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
I'll start the car up tomorrow with the rad cap off and see what it does. That's exactly what I was hoping not to hear but someone had to tell me. Thanks, I'll keep you posted!
Old 02-19-16, 03:14 PM
  #5  
Junior Member

iTrader: (3)
 
PeterFd's Avatar
 
Join Date: May 2013
Location: California
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
I think your water seal is no good. You need a rebuild.
Old 02-21-16, 11:50 AM
  #6  
Junior Member
Thread Starter
 
tarzanarzt's Avatar
 
Join Date: Feb 2016
Location: Maryland
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Okay so the pressure is still building up. Looks like you were right, I'll be looking for a new engine.
Old 02-21-16, 12:14 PM
  #7  
Retired Moderator, RIP

iTrader: (142)
 
misterstyx69's Avatar
 
Join Date: Sep 2005
Location: Smiths Falls.(near Ottawa!.Mapquest IT!)
Posts: 25,581
Likes: 0
Received 131 Likes on 114 Posts
You necessarily do not need a new engine,just a rebuild.
If you feel you can do that yourself you may want to research REBUILD threads and the cost of parts.

Then there is always the other avenue of getting someone to take on the task of rebuilding with a reputable shop.They can be found on here as well.
Old 02-21-16, 03:51 PM
  #8  
Urban Combat Vet

iTrader: (16)
 
Sgtblue's Avatar
 
Join Date: Oct 2003
Location: Mid-west
Posts: 12,012
Received 863 Likes on 612 Posts
^Agreed.
OP...a failed coolant seal is (roughly) the rotary version of a failed head gasket. Unfortunately unlike a piston engine, replacing the coolant seals require complete disassembly of the engine. But it does NOT mean a new engine and the rotary is pretty simple. You buying another used engine for a blown coolant seal is one solution but probably not the smartest.
Old 02-22-16, 12:40 PM
  #9  
Junior Member

iTrader: (3)
 
PeterFd's Avatar
 
Join Date: May 2013
Location: California
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
I think you better off rebuilding it. Is cheaper.
You won't know what you get when you buy another one.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RYN RX-7
Race Car Tech
1
02-02-16 03:30 PM



Quick Reply: Overheating



All times are GMT -5. The time now is 04:43 PM.