It's so high the oil fill cap must be pried off!
Something is howling while idling, but isn't nearly as loud when accelerating.
We've replaced the oil trap, including the rubber rings - so the seal with the crankcase is good. This is when the howling started.
We replaced the MAF sensor, and I checked the throttle body gears and they look fine.
Could it be that the throttle body is just not opened enough at idle (?)
Help!
S80 2.9 non-turbo howling due to high crankcase vacuum
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SuperHerman
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Do a glove test to see if you have PCV issues. You could have a blockage in the block or on one of the lines.
That howling is pressure related from the sounds of it. Double check your work to make sure you have things routed correctly.
That howling is pressure related from the sounds of it. Double check your work to make sure you have things routed correctly.
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RickHaleParker
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When you replaced the Oil trap, did you clean the Banjo bolts, ports in the block and the hoses. If they are partly restricted .. it like putting you lips together and blowing.
Do a glove test and post pictures.
Do a glove test and post pictures.
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Thank you for responding!
If I tried the glove test it would be sucked into the crankcase.
The 2 hoses from the oil trap were new so they’re not blocked. I didn’t see anything in the ports in the block. I’ve seen the videos where they are obviously clogged but I didn’t see anything in mine. Is there a way to check better? Maybe compressed air?
and I didn’t see a banjo bolt. Where is that located? This is a 2003 S80 2.9 non-turbo. I was able to replace the oil trap without removing the intake manifold.
If I tried the glove test it would be sucked into the crankcase.
The 2 hoses from the oil trap were new so they’re not blocked. I didn’t see anything in the ports in the block. I’ve seen the videos where they are obviously clogged but I didn’t see anything in mine. Is there a way to check better? Maybe compressed air?
and I didn’t see a banjo bolt. Where is that located? This is a 2003 S80 2.9 non-turbo. I was able to replace the oil trap without removing the intake manifold.
-
SuperHerman
- Posts: 1798
- Joined: 1 December 2014
- Year and Model: 2004 & 2016 XC90
- Location: Minnesota
- Been thanked: 207 times
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RickHaleParker
- Posts: 7129
- Joined: 25 May 2015
- Year and Model: See Signature below.
- Location: Kansas
- Has thanked: 8 times
- Been thanked: 958 times
Tie the glove down with a Zip tie.
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
-
SuperHerman
- Posts: 1798
- Joined: 1 December 2014
- Year and Model: 2004 & 2016 XC90
- Location: Minnesota
- Been thanked: 207 times
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