Sensor on throttle body

Reply Subscribe

Thread Tools

Search this Thread

Feb 14, 2019 | 03:48 PM

Ter11

Thread Starter

Senior Member

Joined: Feb 2018

Posts: 350

Likes: 42

From: Switzerland

Sensor on throttle body

dear all

Searching for a tiny leak in my XKs cooling system I have recently spotted some minimal stains under UV light under the sensor marked red in the pictures above.

Can anybody tell me what sensor this is. In particular, does it connect into the coolant or is not, i.e. could it be the culprit causing a minimal coolant leak, with coolant residue resting in the cavity visible in the lowest picture?

many thanks!!
ter

Feb 14, 2019 | 04:18 PM

shemp

Veteran Member

Joined: Aug 2016

Posts: 1,496

Likes: 585

From: Plano, TX

Don't know what that sensor is but the hose above it where your red arrow is pointing in the first pic is the bleeder tube for the coolant system. Mine leaked and I had to replace the tube. It's possible it is leaking from that tube and the turbulence from the fan is blowing it onto that sensor.

Check the bleeder tube. It's about $80 US

Feb 15, 2019 | 03:40 PM

Ter11

Thread Starter

Senior Member

Joined: Feb 2018

Posts: 350

Likes: 42

From: Switzerland

This seems to be the infamous MAP sensor, Manifold Air Pressure (or Absolute Pressure) sensor (MAP Pressure Sensor ,Ladedrucksensor VDO 5WK9700Z)

That means it connects into the air manifold, not into the coolant system I guess.

Let the search continue...

Br
ter

Last edited by Ter11; Feb 15, 2019 at 03:43 PM.

Feb 15, 2019 | 07:34 PM

Tp10XKR

Senior Member

Joined: Nov 2018

Posts: 269

Likes: 141

From: North Wales, PA. USA

Quote:

Originally Posted by Ter11

This seems to be the infamous MAP sensor, Manifold Air Pressure (or Absolute Pressure) sensor

+1 MAP sensor, your leak is elsewhere

Feb 15, 2019 | 08:06 PM

kj07xk

Veteran Member

Joined: Jan 2015

Posts: 5,314

Likes: 2,588

From: Naperville, Illinois USA

I’d be suspicious of that ‘T’ fitting and the hoses connected to it, as there are no clamps on them. Clean everything off, wrap a white paper towel around the T, and go for a drive, get the engine hot for awhile, go home and take off the towel. Check for stains or dampness on the towel.