|
XC90 '02–'15 General Forum for the P2-platform XC90 model |
Information |
|
Excess crank pressureViews : 536 Replies : 6Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Sep 14th, 2021, 15:20 | #1 |
New Member
Last Online: Sep 17th, 2021 16:34
Join Date: Nov 2009
Location: Guildford
|
Excess crank pressure
My 2007 D5 consumes oil alarmingly. No oil leaks whatsoever. Taking off the oil filler cap on tick over is like opening a shaken bottle of coke! Same if pull out the dip stick too. Have been getting blocked DPF and am told by dpf guy that this is the route cause of the problem, excess crank breathing pressure forcing oil into induction system, causing vehicle to smoke and choking up DPF.
So what can cause the pressure? |
Sep 14th, 2021, 16:12 | #2 |
Premier Member
Last Online: Jan 15th, 2024 17:24
Join Date: Jun 2010
Location: Bury St Edmunds
|
Excess crankcase pressure can be caused by a blown head gasket, leaking valve seals or worn piston rings - amongst other things. These will also account for the oil consumption.
__________________
Greg |
Sep 14th, 2021, 17:30 | #3 |
New Member
Last Online: Sep 17th, 2021 16:34
Join Date: Nov 2009
Location: Guildford
|
Well before a full top end strip down I’d like to start with basics!! I put a rubber glove over the oil filler and started it up and it blew up like a bloody great balloon!! Is it possible that the brake vacuum pump could leak internally into the rocker cover? I’ve been checking various vacuum pipes and have found nothing of note yet.
|
Sep 14th, 2021, 18:31 | #4 |
Premier Member
Last Online: Dec 26th, 2021 13:42
Join Date: Dec 2013
Location: Crewe
|
On a running engine, you can check the vacuum pump directly with a tester with the brake booster attached and again with the brake booster connector removed but the brake booster hole on the vacuum pump securely blocked off.
If the result is the same steady, full vacuum, the booster vacuum seals are fine.
__________________
2002 S60 SE D5 Manual 209000 miles |
Sep 15th, 2021, 11:02 | #5 | |
New Member
Last Online: Sep 17th, 2021 16:34
Join Date: Nov 2009
Location: Guildford
|
Quote:
|
|
The Following User Says Thank You to beanmasteruk For This Useful Post: |
Jun 8th, 2022, 16:09 | #6 |
Junior Member
Last Online: Mar 11th, 2023 11:27
Join Date: Jun 2012
Location: witney
|
Hi, could you tell me where on the engine the breather is that you changed? Photo even better! thanks.
|
Jun 10th, 2022, 08:52 | #7 |
Volvo XC90 T6 & XC90 D5
Last Online: Mar 19th, 2024 16:44
Join Date: Jul 2020
Location: Marple
|
Please tell us the mileage and engine type - assume its 180k + ona 185bhp?
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|