Coolant reservoir not draining - S2KI Honda S2000 Forums

Notices
S2000 Under The Hood S2000 Technical and Mechanical discussions.

Coolant reservoir not draining

Reply

Old 08-10-2017, 01:16 PM
  #1
Thread Starter
 
Join Date: Jul 2013
Posts: 171
Thanks: 0
Thanked 1 Time in 1 Post
Default Coolant reservoir not draining

On my s2000 I just noticed that my coolant reservoir is full and not draining back into the radiator. What can be causing this? Also after acceleration on decel my friend who was behind me noticed a little white smoke. I'm also on e85 not sure if that has anything to do with that. I don't appear to be using any coolant and my engine temps are fine.
2004TurboS is offline  
Reply With Quote
Old 08-10-2017, 07:13 PM
  #2
 
darcyw's Avatar
 
Join Date: Aug 2010
Location: um, a house
Posts: 2,433
Thanks: 0
Thanked 24 Times in 23 Posts
Default

can our cars run on e85?

cars don't "use coolant". its not a consumable like fuel. the reservoir should remain at the full line or between the low and high line all day long.
​​​​​​​
e85? someone chime in on this one- I wouldn't put in e85 personally.

darcy
darcyw is offline  
Reply With Quote
Old 08-12-2017, 03:48 PM
  #3
 
zeroptzero's Avatar
 
Join Date: Oct 2009
Location: Out There
Posts: 13,735
Thanks: 0
Thanked 15 Times in 15 Posts
Default

The overflow tank only drains into the radiator when the coolant level is low in the rad and engine is low and the system sucks out of the overflow tank. When coolant temps are hot the system dumps into the overflow tank, after cool down the engine and rad suck fluid back out of the coolant tank.

Check to see that the hose in the overflow tank has not fallen off and reaches down close to the bottom of the tank. When the car is totally cool open the rad cap and makes sure the fluid level is full to the base of the rad neck. If both things check out then you are safe.
zeroptzero is offline  
Reply With Quote
Old 08-12-2017, 06:55 PM
  #4
 
Join Date: Oct 2011
Posts: 167
Thanked 0 Times in 0 Posts
Default

My bet is that it's a worn radiator cap. Buy a new one and see if that helps. The cap is what allows the coolant back into the system from the over flow.
d16tof22 is offline  
Reply With Quote
Old 08-14-2017, 12:47 PM
  #5
Thread Starter
 
Join Date: Jul 2013
Posts: 171
Thanks: 0
Thanked 1 Time in 1 Post
Default

I did try new cap. Doesn't change. Might be headgasket?
2004TurboS is offline  
Reply With Quote
Old 08-14-2017, 01:39 PM
  #6
 
Join Date: Aug 2012
Location: Foothills East of Sacramento
Posts: 2,040
Thanks: 0
Thanked 17 Times in 16 Posts
Default

Avoid E85 for other reasons: degradation of rubber seals.
cosmomiller is offline  
Reply With Quote
Old 08-15-2017, 12:31 PM
  #7
 
Join Date: Apr 2003
Location: Temple City
Posts: 7,827
Thanks: 0
Thanked 14 Times in 12 Posts
Default

what is the problem here? your coolant is at full, that's a good place for it to be.
jyeung528 is offline  
Reply With Quote
 


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 01:23 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: