Hdi minor oil leak high front of engine, behind throttle body, also causes occasional light burnt oil smell - source?

[Griffy]

looks like a small round component on back of throttle body between body and engine

What exactly is this c 3 cm diameter device - stop valve? - where is the oil coming from - what attention is needed to resolve

thks

 

[EddieJ]

The below pic might help you show others where your leak is if you circle the area. Personally I stay away from diesel, just look at the amount of stuff they crammed on it.
(Was about to paste in a petrol with the different spots on the rear, then re read you were diesel, silly me).

 

[Griffy]

The below pic might help you show others where your leak is if you circle the area. Personally I stay away from diesel, just look at the amount of stuff they crammed on it.
(Was about to paste in a petrol with the different spots on the rear, then re read you were diesel, silly me).


View attachment 16059

thats great idea...how do i circle the area (non PC in a lot of ways!)?

 

[Griffy]

The below pic might help you show others where your leak is if you circle the area. Personally I stay away from diesel, just look at the amount of stuff they crammed on it.
(Was about to paste in a petrol with the different spots on the rear, then re read you were diesel, silly me).


View attachment 16059

..also , just infront of dipstick, mine appears to have a throttle body, so the leak is a few inches in front of dipstick and few inches to right behind what looks like a throttle body - not very photo friendly area, however I can try - how do i upload images plse?

 

[Griffy]

 

[EddieJ]

I can’t help you with identifying the leak, but mind the rad fins with that light.
Guessing you figured out uploading.
Just below the box you type a response/query into there is a box saying Attach files, click on it and options come up
Photo library (stored on you phone or pad)
Take photo. Just as it say, take and drop pic straight in.

 

[Griffy]

I can’t help you with identifying the leak, but mind the rad fins with that light.
Guessing you figured out uploading.
Just below the box you type a response/query into there is a box saying Attach files, click on it and options come up
Photo library (stored on you phone or pad)
Take photo. Just as it say, take and drop pic straight in.

thks for pointing out rad fin vulnerability - wasnt first thing on my mind having just got car back from 1/100 garage....

Getting photos easily from nokia android phone to windows 10 pc was a challenge

leak is wetting front of engine block from airflow meter height and just behind it

'mechanic' changed his mind from stop valve to a 3 initial part and then entire throttle body - charged £145 + fitting and vat and did nothing with regard to leak

engine ticking / slapping - changed cambelt kit, breaking crank bolt and noise still there

complete AH to deal with, genuinely scary way of treating customers,..many might say

 

[Griffy]

this device on back of throttle body, what is it and can it and its seal be replaced without replacing throttle body to which it is attached?

Is it a vacuum operated cut off valve or similar - proper description / part no.?

 

[Griffy]

looks like the Air Doser Valve, which can leak at custom designed gasket to throttle body ( similar variants may fit apparently) - can be just plain leak or due to excess pressure in crankcase breather system? - How is this rectified?

Anyone done these jobs? Prefer not to have a leak in my as new engine bay!

 

[mickeymac619]

Yeah I had this coming down the A74(M) at Lockerbie

The engine management light came on, car went into limp mode (fault code P1471).

It turned out that the rubber diaphragm in the throttle body (aka 'air doser') had split, allowing oil to spew down the front of the block and onto the alternator* and elsewhere.

An air doser repair kit, including a new diaphragm, is available, but it is more cost effective to replace the complete air doser unit (OEN: 9655233680)

A replacement air doser (aka "electronic throttle body") from AliExpress costs £31.80 including VAT and shipping. It arrived in a couple of days.
Easy DIY job. Some vacuum pipework and electric wiring to move aside and then seven fixing bolts to remove (one hidden, iirc)
Refitting being the reverse of removal.

* Probably a good reason to get that oil leak fixed ASAP.