can anyone expain
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 15
Likes: 0
From: Springdale newfoundland
can anyone expain
New prob.. When the car is at idle temp low or 100 ish....when i drive the car temp climbs to hot ...shift to neutral and temp drops....ANY suggestions as to what to look for?????
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
First thing I would do is make sure there is no air in the system.
When you post it helps to know what year you have as there is slight differences as to the cooling systems and the best way to check them.
When you post it helps to know what year you have as there is slight differences as to the cooling systems and the best way to check them.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
When the engine is moving the car it does work and makes heat, shifting to neutral, the engine makes little HP and makes little heat. Also what is ,"hot"? Normal C4 temperatures are around 190 F. You might also need to install a new thermostat, be sure to use the one that GM says belongs in it.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Jake
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 15
Likes: 0
From: Springdale newfoundland
more info
Sorry guys ,, it's a 1985E ,,,just rebuilt , almost certain the air is gone from the system.. but the sensor wire between 1 & 3 has no power ,,even when car it running ....temp on guage cimbs and falls with the gas???? i'm questioning the ground's? or the wires....any other suggestions would be great!! thanks
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Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
If temps follow immediately with engine speed I suspect an open to or at the sensor. First check for +5Vdc on the sensor wire; if present check resistance value of the sensor, it should read some finite value.
Last edited by 65Z01; Jun 2, 2010 at 01:06 PM.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
i suspect the 85E and 86L are wired the same. If they are:
On the 1986, the fan switch was between 1 & 3 and the dash temp gage was between about 4 & 6 (maybe 6 & 8, but it's the only one so you can't miss it).
I'd have to check the 85E FSM to see when voltage is present at the 1 & 3 switch. Maybe someone else can post that for you.
Jake
My son, Ryan M. Cameron, graduated from West Point on 22 May 2010! He was commissioned as a 2nd Lieutenant and I pinned on his first pair of "Butter Bars" PROUDEST DAY OF MY LIFE!!
On the 1986, the fan switch was between 1 & 3 and the dash temp gage was between about 4 & 6 (maybe 6 & 8, but it's the only one so you can't miss it).
I'd have to check the 85E FSM to see when voltage is present at the 1 & 3 switch. Maybe someone else can post that for you.
Jake
My son, Ryan M. Cameron, graduated from West Point on 22 May 2010! He was commissioned as a 2nd Lieutenant and I pinned on his first pair of "Butter Bars" PROUDEST DAY OF MY LIFE!!
Le Mans Master
Joined: Jun 2006
Posts: 5,642
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From: One day you're a Comet...the next day you're dust... Arkansas
Sorry guys ,, it's a 1985E ,,,just rebuilt , almost certain the air is gone from the system.. but the sensor wire between 1 & 3 has no power ,,even when car it running ....temp on guage cimbs and falls with the gas???? i'm questioning the ground's? or the wires....any other suggestions would be great!! thanks
Last edited by BADDUCK; Jun 2, 2010 at 06:28 PM.