smoke from under the bonnet

watersonpaul · Sep 9th, 2010, 08:12

Hi All,

I have a 2001 XC70 - in the last couple of days i have noticed smoke appearing from under the drivers side of the bonnet when i am stationary. There is not a vast amount of it and revving the engine does not increase the amount of smoke. I suspect that it is oil being burnt -it smells of 'hot engine'. All engine temperatures are ok and no oil warning light has come on. I don't know whether it only does it at idle - it could be that the smoke is there all the time but i don't see it when moving.
I have opened the bonnet to try to see where the smoke comes from and it seems its the lower end on the driver's side.

Does anyone have any thoughts/ideas?

Thought i'd try here before going anywhere near the Volvo dealer - had a very expensive and unsatisfactory experience with them recently.

Cheers

Paul

Georgey dee · Sep 9th, 2010, 08:38

I would take a punt and say it's the coolant cap venting off. Get a new cap (about £10 from Volvo) If it still does it then get the coolant checked/sniffed for exhaust gases which could point to a head gasket problem.

captcaveman · Sep 9th, 2010, 14:34

Quote:

Originally Posted by watersonpaul

Hi All,

I have a 2001 XC70 - in the last couple of days i have noticed smoke appearing from under the drivers side of the bonnet when i am stationary. There is not a vast amount of it and revving the engine does not increase the amount of smoke. I suspect that it is oil being burnt -it smells of 'hot engine'. All engine temperatures are ok and no oil warning light has come on. I don't know whether it only does it at idle - it could be that the smoke is there all the time but i don't see it when moving.
I have opened the bonnet to try to see where the smoke comes from and it seems its the lower end on the driver's side.

Does anyone have any thoughts/ideas?

Thought i'd try here before going anywhere near the Volvo dealer - had a very expensive and unsatisfactory experience with them recently.

Cheers

Paul

I had this once it was a loose union on the injector which allowed deisel to leak onto the cylinder head.
Once nipped up everything was fine after.

Mr-V70 · Sep 9th, 2010, 14:58

Quote:

Originally Posted by captcaveman

I had this once it was a loose union on the injector which allowed deisel to leak onto the cylinder head.
Once nipped up everything was fine after.

I second that, same thing happened to me.

Sam

TopSkateDog · Oct 5th, 2016, 09:51

Quote:

Originally Posted by captcaveman

I had this once it was a loose union on the injector which allowed deisel to leak onto the cylinder head.
Once nipped up everything was fine after.

I occasionally see the very same symptoms.

Was it apparent, when looking, which union / injector it was? (there's one per cylinder, isn't there?)

Simon Jones · Oct 5th, 2016, 12:31

Petrol or diesel? If petrol it could be PCV issue, or if diesel it could be injector leak. Remove the plastic engine cover & look for the pool of diesel that accompanies this problem.

jasmith44 · Oct 5th, 2016, 12:42

Spilt oil on cylinder head when topping up.?

TopSkateDog · Oct 5th, 2016, 12:53

Quote:

Originally Posted by Simon Jones

Petrol or diesel? If petrol it could be PCV issue, or if diesel it could be injector leak. Remove the plastic engine cover & look for the pool of diesel that accompanies this problem.

Sorry, diesel - late 2002 D5 (E3?).

Will it leave evidence, in case a couple of days have gone by? Or will a hot engine burn it off and leave little clue?

Won't get chance, probably during the week to look at it, will probably get time over the weekend.

TopSkateDog · Oct 5th, 2016, 12:56

Quote:

Originally Posted by jasmith44

Spilt oil on cylinder head when topping up.?

Car is new to me, only had it a couple of weeks, so can't be sure. But have noticed the exact same symptoms occasional brief bit of smoke from the driver's side, and a diesel-y smell, at times, when I get out.

Simon Jones · Oct 5th, 2016, 13:21

Quote:

Originally Posted by TopSkateDog

Sorry, diesel - late 2002 D5 (E3?).

Will it leave evidence, in case a couple of days have gone by? Or will a hot engine burn it off and leave little clue?

Won't get chance, probably during the week to look at it, will probably get time over the weekend.

If it's a leak around the injectors, it wont burn off as it does not get hot enough. My previous D5 used leak a bit here and you clearly see a puddle of oily fuel on top of the alloy rocker cover.

Sep 9th, 2010, 08:12	#1
watersonpaul New Member Last Online: Sep 9th, 2010 14:11 Join Date: Sep 2010 Location: Cheltenham	smoke from under the bonnet Hi All, I have a 2001 XC70 - in the last couple of days i have noticed smoke appearing from under the drivers side of the bonnet when i am stationary. There is not a vast amount of it and revving the engine does not increase the amount of smoke. I suspect that it is oil being burnt -it smells of 'hot engine'. All engine temperatures are ok and no oil warning light has come on. I don't know whether it only does it at idle - it could be that the smoke is there all the time but i don't see it when moving. I have opened the bonnet to try to see where the smoke comes from and it seems its the lower end on the driver's side. Does anyone have any thoughts/ideas? Thought i'd try here before going anywhere near the Volvo dealer - had a very expensive and unsatisfactory experience with them recently. Cheers Paul

Sep 9th, 2010, 08:38	#2
Georgey dee Premier Member Last Online: May 1st, 2024 06:21 Join Date: Dec 2005 Location: Norwich View Photos By: Georgey dee	I would take a punt and say it's the coolant cap venting off. Get a new cap (about £10 from Volvo) If it still does it then get the coolant checked/sniffed for exhaust gases which could point to a head gasket problem. __________________ HAD; 440 GLT(Loved it), 850 GLT auto(Loved it), S70 2.5T(Nothing but problems!), 850R auto(Loved it!!), S60 D5 SE (Nothing but problems!) GOT; S60 D5 SE Lux Auto RAF Marham Track Day Co-Ord'

Oct 5th, 2016, 12:42	#7
jasmith44 jasmith44 Last Online: Jul 24th, 2024 14:05 Join Date: Nov 2007 Location: burnley	Spilt oil on cylinder head when topping up.? __________________ 244 / 460 / 440 /850x2/ s40x2 / s80 / s60 2.0t/ S60 ES T3. Current 2008 S80 2.5 SE T A.

Oct 5th, 2016, 12:31	#6
Simon Jones Premier Member Last Online: May 29th, 2024 06:32 Join Date: Feb 2009 Location: Salisbury (ish)	Petrol or diesel? If petrol it could be PCV issue, or if diesel it could be injector leak. Remove the plastic engine cover & look for the pool of diesel that accompanies this problem.

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