What could be causing my random heating problems?
11-30-2004, 03:58 PM
#1
Honda-Tech Member
Thread Starter
Join Date: Jun 2003
Posts: 2,136
Likes: 0
Received 0 Likes
on
0 Posts
What could be causing my random heating problems?
Since my car is out for about the next 3 weeks i decided to grab my dads old AT 92 Si and put it to use again.
The car had been out of use due to a bad radiator, we just changed the top "end tank" (im sorry, don't know what its really called in English) and the leaking problems stopped. But now that car has a very random behavior regarding temperature.
When im going up hill the temperature will rise 3/4 of the way to Hot and after like 50 seconds drop back real fast to normal temperature. It does this but every time it drops back it goes a little higher, in the end after about 4 times of this process i have to stop the car. Going down hill the car does not over heat and on flat terrain it remains a bit over normal temperature but is drivable.
I thought it might be something like the thermostat having trouble opening and closing but im really clueless. I also notice when the end tank was changed they used a new cap that read 0.9 instead of the usual 1.2.
I searched but found only different situations, thanks in advance.
The car had been out of use due to a bad radiator, we just changed the top "end tank" (im sorry, don't know what its really called in English) and the leaking problems stopped. But now that car has a very random behavior regarding temperature.
When im going up hill the temperature will rise 3/4 of the way to Hot and after like 50 seconds drop back real fast to normal temperature. It does this but every time it drops back it goes a little higher, in the end after about 4 times of this process i have to stop the car. Going down hill the car does not over heat and on flat terrain it remains a bit over normal temperature but is drivable.
I thought it might be something like the thermostat having trouble opening and closing but im really clueless. I also notice when the end tank was changed they used a new cap that read 0.9 instead of the usual 1.2.
I searched but found only different situations, thanks in advance.
11-30-2004, 04:03 PM
#2
Mr. Badwrench
Join Date: May 2002
Location: stranger in a strange land
Posts: 14,146
Likes: 0
Received 2 Likes
on
2 Posts
Re: What could be causing my random heating problems? (Blindstuff)
put the front end in the air, take off the cap, run it till the fan comes on to make sure all the air is out of the cooling system.
11-30-2004, 04:07 PM
#3
Honda-Tech Member
Thread Starter
Join Date: Jun 2003
Posts: 2,136
Likes: 0
Received 0 Likes
on
0 Posts
Re: What could be causing my random heating problems? (boostedcivicsir)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedcivicsir »</TD></TR><TR><TD CLASS="quote">put the front end in the air, take off the cap, run it till the fan comes on to make sure all the air is out of the cooling system.</TD></TR></TABLE>
Wouldnt air in the system cause idle problems as well? The car idles perfectly.
Wouldnt air in the system cause idle problems as well? The car idles perfectly.
11-30-2004, 04:45 PM
#4
Honda-Tech Member
Join Date: Mar 2003
Location: São Paulo, Brazil
Posts: 6,994
Likes: 0
Received 0 Likes
on
0 Posts
Re: What could be causing my random heating problems? (Blindstuff)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blindstuff »</TD></TR><TR><TD CLASS="quote">I also notice when the end tank was changed they used a new cap that read 0.9 instead of the usual 1.2.
</TD></TR></TABLE>
When you put a bigger pressure cap, you raise the water's boiling point.
Maybe it's time for a new headgasket?
</TD></TR></TABLE>
When you put a bigger pressure cap, you raise the water's boiling point.
Maybe it's time for a new headgasket?
11-30-2004, 05:37 PM
#5
Honda-Tech Member
Thread Starter
Join Date: Jun 2003
Posts: 2,136
Likes: 0
Received 0 Likes
on
0 Posts
Re: What could be causing my random heating problems? (Starscream)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Starscream »</TD></TR><TR><TD CLASS="quote">Maybe it's time for a new headgasket? </TD></TR></TABLE>
I hope not, i will just give the car back to my dad, i dont feel like dealing with that.
C'mon, anyone else???
I hope not, i will just give the car back to my dad, i dont feel like dealing with that.
C'mon, anyone else???
11-30-2004, 05:58 PM
#6
Junior Member
Join Date: Dec 2003
Location: San Jose, CA
Posts: 478
Likes: 0
Received 0 Likes
on
0 Posts
Re: What could be causing my random heating problems? (Blindstuff)
Does you fan come on?
Also does you temp needle sometimes move erraticly?
Cause I had the same type of problem when I swaped in my built motor.
Car would Idle fine.
Runs Strong
Bleed the cooling system
Replaced Thermostat
Tested the fan and thermoswitch
But the car would slowly have the temp needle climb to the point of overheating. Funny thing after doing all that I decied to replace the temp sensor which runs the gauge in your Cluster, It turned out after I got the head built I forgot to tighten that sensor. I guess the bad grounding caused the needle to read higher that it really was. And the reason my fan never turned on was because the car was running very cool.
A sigh a relief after figuring that one out.
GL
Also does you temp needle sometimes move erraticly?
Cause I had the same type of problem when I swaped in my built motor.
Car would Idle fine.
Runs Strong
Bleed the cooling system
Replaced Thermostat
Tested the fan and thermoswitch
But the car would slowly have the temp needle climb to the point of overheating. Funny thing after doing all that I decied to replace the temp sensor which runs the gauge in your Cluster, It turned out after I got the head built I forgot to tighten that sensor. I guess the bad grounding caused the needle to read higher that it really was. And the reason my fan never turned on was because the car was running very cool.
A sigh a relief after figuring that one out.
GL
11-30-2004, 06:00 PM
#7
Honda-Tech Member
Thread Starter
Join Date: Jun 2003
Posts: 2,136
Likes: 0
Received 0 Likes
on
0 Posts
Re: What could be causing my random heating problems? (eddyboy)
The fan does come on, the needle moves slowly, no jumping, its reading well, the car was for sure over heated when i poped the hood the first time...
Trending Topics
11-30-2004, 06:04 PM
#8
No tears. Only dreams, now.
I'll help!
First, check your coolant, and make sure that you have enough.
Second, check the bleeder screw... the little valve that lets air out of the hoses.
Tighten it, but not too far, or it will break.
Squeeze the hoses when the car is running to make sure that there is actually fluid in them.
If there isn't, something's clogged.
Check the coolant mixture.. (half antifreeze, half water).
And, the thing I think it is, change the thermostat. It'll take you 20 minutes, and cost less than $15. Put a lower temperature thermostat on there while you're at it.
First, check your coolant, and make sure that you have enough.
Second, check the bleeder screw... the little valve that lets air out of the hoses.
Tighten it, but not too far, or it will break.
Squeeze the hoses when the car is running to make sure that there is actually fluid in them.
If there isn't, something's clogged.
Check the coolant mixture.. (half antifreeze, half water).
And, the thing I think it is, change the thermostat. It'll take you 20 minutes, and cost less than $15. Put a lower temperature thermostat on there while you're at it.
11-30-2004, 06:07 PM
#9
No tears. Only dreams, now.
Oh, and the "end tank" that you're talking about. This wouldn't happen to be made of white plastic would it? That's called the "overflow resevoir". If that's the case, then it may just be your head gasket.
One way to make sure that it's not the gasket is to check the color of the coolant, and the oil. If either of those look strange, let us know.
One way to make sure that it's not the gasket is to check the color of the coolant, and the oil. If either of those look strange, let us know.
11-30-2004, 06:23 PM
#10
Honda-Tech Member
Thread Starter
Join Date: Jun 2003
Posts: 2,136
Likes: 0
Received 0 Likes
on
0 Posts
Re: (VashTheStampede)
Thanx a lot. 
Im sure the mixture of coolant water is off, i will fix that in the morning, and make sure that there is enough fluid there and no air bubbles. If that doesnt do the trick, thermostat.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VashTheStampede »</TD></TR><TR><TD CLASS="quote">Oh, and the "end tank" that you're talking about. This wouldn't happen to be made of white plastic would it? That's called the "overflow resevoir".</TD></TR></TABLE>
I was talking about the top of the radiator, where the cap goes.
Im sure the mixture of coolant water is off, i will fix that in the morning, and make sure that there is enough fluid there and no air bubbles. If that doesnt do the trick, thermostat.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VashTheStampede »</TD></TR><TR><TD CLASS="quote">Oh, and the "end tank" that you're talking about. This wouldn't happen to be made of white plastic would it? That's called the "overflow resevoir".</TD></TR></TABLE>
I was talking about the top of the radiator, where the cap goes.
Thread
Thread Starter
Forum
Replies
Last Post