Notices
Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Idle temp 203F, Highway temp 223F???

Thread Tools
 
Search this Thread
 
Old 06-16-2019, 06:16 PM
  #1  
Honda-Tech Member
Thread Starter
 
weekendboost's Avatar
 
Join Date: Dec 2012
Posts: 116
Likes: 0
Received 2 Likes on 2 Posts
Default Idle temp 203F, Highway temp 223F???

So I blew a head gasket because one of the hoses ripped, temp gauge usually sits slightly under half but went up to 3/4 before I shut the car off. Regardless, next morning I found coolant coming from the exhaust manifold so I changed the head gasket(original was indeed destroyed), replaced radiator, resurfaced head, pulled and resealed the coolant neck and head sensors. At the same time I got an s300 so I used that to keep an eye on the ect and city driving it sits at 203F normally which I find odd. The fan kicks in at 205F and at 60mph it goes up to 208F, at 70 it's 211F, at 90 it's gotten up to 223F. The temp gauge moves very slightly from those ranges up to halfway. Before I gotten the s300 years ago, when I was driving and noticed that the temp gauge does move up a little bit when I overtake on highway but nowhere past half. Is this normal, I would think at 220F the temp needle should be moving pretty close to high considering many people saying 180F-200F is average temp.
Old 06-16-2019, 07:03 PM
  #2  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 3,719
Received 328 Likes on 308 Posts
Default Re: Idle temp 203F, Highway temp 223F???

Car and engine?

Are you losing coolant?

Bubbles in the radiator with engine running?

Was the block top flat?

Did you replace the thermostat and thoroughly bleed the cooling system?
The following users liked this post:
Old 06-18-2019, 05:38 PM
  #3  
Honda-Tech Member
 
JasonHi's Avatar
 
Join Date: Sep 2008
Location: Riverside, Ca, USA
Posts: 124
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Idle temp 203F, Highway temp 223F???

on the s300 try putting your fan switch at 185f. also saw you replaced your radiator, did you check if your fans blowing the right direction? would be pulling air through radiator
Old 06-18-2019, 06:29 PM
  #4  
Honda-Tech Member
 
chrysler kid's Avatar
 
Join Date: Nov 2003
Location: Plano, Texas, USA
Posts: 1,901
Received 104 Likes on 79 Posts
Default Re: Idle temp 203F, Highway temp 223F???

So uh, when you had the head off did you not replace the water pump or thermostat?
Old 06-20-2019, 01:51 AM
  #5  
Honda-Tech Member
iTrader: (9)
 
bks84's Avatar
 
Join Date: Dec 2005
Location: Independence, MO, USA
Posts: 4,254
Received 8 Likes on 8 Posts
Default Re: Idle temp 203F, Highway temp 223F???

Have the head resurfaced?
Old 06-21-2019, 04:03 PM
  #6  
Honda-Tech Member
Thread Starter
 
weekendboost's Avatar
 
Join Date: Dec 2012
Posts: 116
Likes: 0
Received 2 Likes on 2 Posts
Default Re: Idle temp 203F, Highway temp 223F???

It's a d16z6, I was suspecting head gasket because there's very tiny amount of bubbles every min and I checked the block but I didn't have a straight edge. Instead I used a angle square which looked pretty straight (that might be my mistake there). But before doing that again I figured I'd ask to see if there's anything I'm missing.

not losing coolant
replaced thermostat
bled as much as possible
did coolant flush and bled again
fan blowing towards engine
replaced water pump, timing belt, rear main seal
Old 06-21-2019, 04:04 PM
  #7  
Honda-Tech Member
Thread Starter
 
weekendboost's Avatar
 
Join Date: Dec 2012
Posts: 116
Likes: 0
Received 2 Likes on 2 Posts
Default Re: Idle temp 203F, Highway temp 223F???

Also no oil, coolant leaks, nothing. I think that's everything, gonna go ahead buy the parts and do a leak down test.
Old 06-21-2019, 06:11 PM
  #8  
Honda-Tech Member
 
muellersfan's Avatar
 
Join Date: Apr 2018
Posts: 3,719
Received 328 Likes on 308 Posts
Default Re: Idle temp 203F, Highway temp 223F???

Originally Posted by weekendboost
Also no oil, coolant leaks, nothing. I think that's everything, gonna go ahead buy the parts and do a leak down test.
You can get a rental block tester kit at AutoZone.
The following users liked this post:




All times are GMT -8. The time now is 02:35 PM.