Chirpping hood 75 280z and other shake outs

[Dave WM]

I am sure this has come up before. I was taking the Z out on a road worthiness test (75 mph plus for extended time), when I got to my destination I could hear a chipping sound that came from the front of the car but did not sound like the engine. I popped the hood and it stopped. Closing the hood would let it start again. I Sherlocked it to something with the hood fitment from that. I could then see the hood had some noticeable vibration on one side near the back. Adjusted the rubber bumper using a dollar bill to test for contact and all good. Next up I noticed the water temp dropping and then becoming erratic, found the temp sending unit stud socket that had been replaced by the PO was loose just resting on the stud. It looked like a typical female bullet connector which I am pretty sure is not the right type for a high vibration environment like under the hood. I order up what I think it the correct. The PO used the same type of connector on the oil pressure sending unit and it has come off in the past as well. Needless to say I will fix that as well. Other than that it did the high speed test fine. I am trying to work up the nerve to take it on a 200 mile trip (highway speeds). I have replaced the hoses and belts, thermostat and fan clutch. I have NOT replaced the water pump, fear of breaking bolts. It does not leak and the bearing sounds good with no play. Pressure tested the rad (head fine at about 14lbs) and it runs pretty cool anyway (160f thermostat) stays right in the middle regardless of temps or speed.

Edited August 16, 2016 by Dave WM

[cbuczesk]

Stock connector is a female bullet for that.

Chuck

 

[Dave WM]

I was looking at the kind that has wire clip built inside the rubber cover that grips on the bullet. The ones that are on there seem to come off pretty easy. Perhaps what is on there is correct but just poorly built.

something more like this

http://www.repairconnector.com/products/GM-Ford-Chrysler-Universal-Stud-Socket-Pigtail-.html

Has something like this on there now

 

Edited August 16, 2016 by Dave WM

[Dave WM]

double post

Edited August 16, 2016 by Dave WM

[cbuczesk]

The stock connector works pretty well. I clean the connections and then crush the connector a little bit to make the opening smaller.

Chuck

 

[Dave WM]

I doubt the one the PO had on was stock it was grafted on with a crimp connector.

[siteunseen]

I replaced mine with high heat crimp on connectors.  There is no rubber or plastic on them.  And like Chuck said I closed them up for a sure tight fit.