Water Temp
#1
Advanced
Thread Starter
Member Since: Jul 2009
Location: Columbia CT
Posts: 72
Likes: 0
Received 0 Likes
on
0 Posts
Water Temp
I have an issue with my water temp. gauge... I think. When I drive the car for maybe 5 minutes is goes up all the way to 250, which is the end of the gauge. If I goose the car a bit, or drive it on the highway, it shoots beyond what's readable to a position that would read 400+ if the numbers went that high. Then it will go back down to 250. The car doesn't seem to be over-heating. I probably drove it for 30 minutes or so to my mom's house, then 30 minutes back to my house.
Also, on the highway, I'm at about 3500 to 4000 RPM's even though the readline is 5500... does that sound right? I'm doing about 65. And it's a 66 327, 300hp (or so I believe) it's NOM.
Is there an easy way to trouble shoot the temp. gauge? And if I'm not up for it, should a general repair shop be able to? There is a Corvette shop close by, but I had an incident with them last time I brought it there and don't feel comfortable with them.
Thanks for any response to my dumb questions
Also, on the highway, I'm at about 3500 to 4000 RPM's even though the readline is 5500... does that sound right? I'm doing about 65. And it's a 66 327, 300hp (or so I believe) it's NOM.
Is there an easy way to trouble shoot the temp. gauge? And if I'm not up for it, should a general repair shop be able to? There is a Corvette shop close by, but I had an incident with them last time I brought it there and don't feel comfortable with them.
Thanks for any response to my dumb questions
#3
Tech Contributor
I recently came across a 65 with a similar problem with the temp gauge.
The problem was a gauge that was not properly grounded to the dash housing.
The problem was a gauge that was not properly grounded to the dash housing.
#4
I had a similar question the other day and have not had time to work on it, my question is, I did have the dash cluster part of the way out when fixing at amp guage, you talk about grounding the temp guage or cluster, how do you do that and how do you know visibly you have done it correctly, short of the guage working ,thanks Mike
#5
Tech Contributor
I had a similar question the other day and have not had time to work on it, my question is, I did have the dash cluster part of the way out when fixing at amp guage, you talk about grounding the temp guage or cluster, how do you do that and how do you know visibly you have done it correctly, short of the guage working ,thanks Mike
The cluster gets ground from a black wire with a female connector which attaches to a male tab mounted on the back of the cluster, above the Tach.
#6
Team Owner
Member Since: Oct 2000
Location: Washington Michigan
Posts: 38,899
Received 1,857 Likes
on
1,100 Posts
Best way to check the temp gauge is to shoot the upper radiator hose just above the thermostat housing with an I.R. gun and compare that reading against what the gauge shows at the same time so you know what the gauge is really telling you.
#7
Le Mans Master
Have you checked your speedo accuracy? If it's correct, 3500-4000 at 65 mph says you have a 4.56:1 axle.
Best way to check the temp gauge is to shoot the upper radiator hose just above the thermostat housing with an I.R. gun and compare that reading against what the gauge shows at the same time so you know what the gauge is really telling you.
Best way to check the temp gauge is to shoot the upper radiator hose just above the thermostat housing with an I.R. gun and compare that reading against what the gauge shows at the same time so you know what the gauge is really telling you.
A 4:11 rear gear should give you right about 3,250 rpm's at 65 mph. Check your speedo and tach a little closer to see just what you are reading at 65 . . . . .