Hi, Pls help identify these engine parts? VR UTE AUTO 94 3.8

[Gthayes]

Hi Guys, recently been suffering over heating troubles. No rhyme or reason to them?
Example. Drove for 45 through the city, parked up for 1hr and my vr overheated within 10 mins of setting out again?
Anyway I have studied all the posts on here regarding over heating and have deduced it the thermostat.

Fan is not coming on.
Fan comes on with AC.
Pumps good, took off top radiator hose and started her up. Coolant pumped out good.
Refilled and bled with the bleed valve (situated on the metal tube shaped part top hose connects to)

There must be a lot of modifications around 94 as every post describes diagnosing the fault and locating parts totally different to what I have.

I have located 3 wired possible sensors around the water pump. And also a completely random rubber hose with metal nipple tube attached?? Appears to originate from the auto box. Also it has no vacuum but what appears to be oil on the nipple?

What are the following parts pictured.

Pic 1 These 2 connections are situated under the alternator. (when unplugged fan comes on and temp gauge no longer works)
Pic 2 Is a single wire plug situated on the side of the water pump (the white is the top of the oil filter)
Pic 3 mystery hose fitting, appears to originate from the auto trans? (situated under the master cylinder)
pic 4 These are the plugs taken from under the alternator (see pic 1)
Pic 5 Is this bolt the top of the thermostat?

Thanks for your help guys!

 

[K-BAGZ]

Pic 1 - L/H is the coolant temperature sender. Coolant temperature dash reading only. R/H is the coolant temperature sensor. This operates the fan control circuit through the ECU. I'd replace both of these as they are relatively cheap. Genuine or Tridon. It doesn't matter.

Tridon Part # Coolant temperature sensor - TCS040
Tridon Part # Coolant temperature sender - TTS062

Pic 2 - Knock sensor wiring. Adjusts spark timing against engine/chassis vibrations.

Pic 3 - Yes, you are missing the other end. Don't ask me where though.

Pic 4 - Refer to Pic 1 desc.

Pic 5 - Intake manifold bolt.

 

[FXST01]

Pic 1 as above post.
Pic 2 as above post.
Pic 3 other than the fact it is on the driver's side of the engine and if your auto cooler lines are connected, then it may be the breather for the transmission.
Pic 4 as above post.
Pic 5 is the cover to your PCV valve.
To remove thermostat you need to remove the adaptor that your top radiator hose goes into. This adapter also holds the bleed valve. You will need a 12mm spanner or socket and extension to remove the adaptor.

 

[yoshi87]

pic 3 as above is just the breather which the other end is attatched o the top of gearbox, the visable end should be placed in a hole on the chassi