Engine: D5: - V70 very inter power loss cured !!

hobbyhorse · Mar 28th, 2009, 22:05

This fault has been bugging me for a couple of years, it's been very intermittant & gives no fault codes : a sudden power loss in mostly second & third gear with no excess smoke from the exhaust. I think most of us are well aware of the weird & wonderful intermittant power losses caused by the fuel filter & the head scratching fault codes that arise from the fuel starvation; this next fault involves air starvation, hopefully this will help some people out:

The trusty D5

Cover removed

The inlet pipe to the turbo is not easy to reach but I'm determined to leave the top engine mount & crossbar in place

The turbo creates quite a high localised vacuum in the inlet pipework, the rubber inlet pipe has denatured & gone very soft. Under heavy boost the vacuum is sufficient to squash the pipe & stop the airflow. My paws are quite big, it's a bit of a struggle. I end up laying on the engine but that's cool 'cos I love this car

Luckily the jubilee clamps are moveable, nearly there now

The vacuum has crushed the pipe so hard it's split.

Notice the pipe is so soft I can easily squash it into a ball

The new pipe is very hard & I struggled to get the crankcase ventilation spigot in for 15 minutes before I cheated & gave the plastic body a chamfer with the Dremmel

Job done. It's been a bit of a tussle but I'm well pleased to have finally cured this fault, the car's never driven better. Also I've just got the all clear from a year long cancer scare. It's been a good day

pipe part No 30636854

Chris_Rogers · Mar 29th, 2009, 10:49

Well done and good news on both counts!

Silverbrick · Mar 29th, 2009, 14:43

Quote:

Originally Posted by Chris_Rogers

Well done and good news on both counts!

Indeed!

Silverbrick · Mar 29th, 2009, 14:46

How many miles on the car HH?

hobbyhorse · Mar 29th, 2009, 15:58

Quote:

Originally Posted by Silverbrick

How many miles on the car HH?

She's just turned 74k, this fault first showed at about 50k, she's a 53 reg

Silverbrick · Mar 29th, 2009, 20:36

Mines also a 53 plate and has 66k so I think I`ll check mine as its easy to get to

Thanks for taking the time and posting the pics for us

S60-MBS · May 17th, 2009, 16:41

Thanks HH,Only seen this post today,Its posts like this and folk like you who make VOC forumn worthwhile

Ps : out of curiousity how much was the part?

Clan · May 17th, 2009, 17:58

The fact that the vacuum collapsed the weakened from oil pipe also shows that the engine would benefit from a larger air filter and pipework to the turbo ... In an ideal world there would be no vacuum at the turbo charger inlet ..

Georgey dee · May 17th, 2009, 18:41

Nice one! I'll be checking mine ASAP. Good right up and well done on both counts

.

Bernard333 · May 17th, 2009, 19:46

Cant believe I missed your original post at the end of March as I thought I was diligent in reading diesel posts , just makes me think I have probably missed some other useful posts as well , great photos and well done beating the cancer . I had the turbo off my D5 looking for a reason for intermittant power loss over past 30k miles but no repeat at all since end of Jan but nothing done to repair except unplugging and reconnecting various sensors so I am inclined to think the original cause is still there , I did check the turbo pipes but I recall the inlet pipe being soft as you describe and thought that was normal ! I will get this changed asap and have a closer look for splits .

Mar 28th, 2009, 22:05	#1
hobbyhorse Premier Member Last Online: Jan 26th, 2015 21:30 Join Date: Dec 2006 Location: Billericay	V70 very inter power loss cured !! This fault has been bugging me for a couple of years, it's been very intermittant & gives no fault codes : a sudden power loss in mostly second & third gear with no excess smoke from the exhaust. I think most of us are well aware of the weird & wonderful intermittant power losses caused by the fuel filter & the head scratching fault codes that arise from the fuel starvation; this next fault involves air starvation, hopefully this will help some people out: The trusty D5 Cover removed The inlet pipe to the turbo is not easy to reach but I'm determined to leave the top engine mount & crossbar in place The turbo creates quite a high localised vacuum in the inlet pipework, the rubber inlet pipe has denatured & gone very soft. Under heavy boost the vacuum is sufficient to squash the pipe & stop the airflow. My paws are quite big, it's a bit of a struggle. I end up laying on the engine but that's cool 'cos I love this car Luckily the jubilee clamps are moveable, nearly there now The vacuum has crushed the pipe so hard it's split. Notice the pipe is so soft I can easily squash it into a ball The new pipe is very hard & I struggled to get the crankcase ventilation spigot in for 15 minutes before I cheated & gave the plastic body a chamfer with the Dremmel Job done. It's been a bit of a tussle but I'm well pleased to have finally cured this fault, the car's never driven better. Also I've just got the all clear from a year long cancer scare. It's been a good day pipe part No 30636854 Last edited by hobbyhorse; Mar 28th, 2009 at 22:12.

Mar 29th, 2009, 14:46	#4
Silverbrick Deep sea Skiver!!! Last Online: Sep 24th, 2014 14:59 Join Date: Dec 2007 Location: Workington	How many miles on the car HH? __________________ `53 V70 D5 SE manual Silver. Light oak & off black leather, Bi Xenons, Sunroof, winter pack, electric front seats.

Mar 29th, 2009, 20:36	#6
Silverbrick Deep sea Skiver!!! Last Online: Sep 24th, 2014 14:59 Join Date: Dec 2007 Location: Workington	Mines also a 53 plate and has 66k so I think I`ll check mine as its easy to get to Thanks for taking the time and posting the pics for us __________________ `53 V70 D5 SE manual Silver. Light oak & off black leather, Bi Xenons, Sunroof, winter pack, electric front seats.

May 17th, 2009, 16:41	#7
S60-MBS VOC Member Last Online: Jun 7th, 2020 11:28 Join Date: Jan 2006 Location: ???????????????? View Photos By: S60-MBS	Thanks HH,Only seen this post today,Its posts like this and folk like you who make VOC forumn worthwhile Ps : out of curiousity how much was the part? __________________

May 17th, 2009, 17:58	#8
Clan Experienced Member Last Online: Today 12:21 Join Date: Jun 2007 Location: L/H side	The fact that the vacuum collapsed the weakened from oil pipe also shows that the engine would benefit from a larger air filter and pipework to the turbo ... In an ideal world there would be no vacuum at the turbo charger inlet .. __________________ My comments are only based on my opinions and vast experience .

Mar 29th, 2009, 10:49	#2
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	Well done and good news on both counts!

May 17th, 2009, 18:41	#9
Georgey dee Premier Member Last Online: Feb 14th, 2024 18:36 Join Date: Dec 2005 Location: Norwich View Photos By: Georgey dee	Nice one! I'll be checking mine ASAP. Good right up and well done on both counts. __________________ 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'

May 17th, 2009, 19:46	#10
Bernard333 Premier Member Last Online: Oct 20th, 2021 11:41 Join Date: Nov 2007 Location: Ramelton	Cant believe I missed your original post at the end of March as I thought I was diligent in reading diesel posts , just makes me think I have probably missed some other useful posts as well , great photos and well done beating the cancer . I had the turbo off my D5 looking for a reason for intermittant power loss over past 30k miles but no repeat at all since end of Jan but nothing done to repair except unplugging and reconnecting various sensors so I am inclined to think the original cause is still there , I did check the turbo pipes but I recall the inlet pipe being soft as you describe and thought that was normal ! I will get this changed asap and have a closer look for splits .

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