Engine: 164 2978cc: - mayo in rocker cover

Laurent · Dec 19th, 2007, 16:51

Hi, my B30A started to produce a lot of creamy mayo in the rocker cover for about 2 months. There is no oil in the cooling water and vice-versa. The car works fine and doesnt seem to use water. Any idea?
Thanks, Laurent

niloc · Dec 19th, 2007, 16:53

Are you using the car much? Any long journeys?

If not, take it for a blast down the motorway - it's a build up of condensation caused by short journeys...

Laurent · Dec 19th, 2007, 17:15

Thanks for quick answer. The car is used daily by my wife to do about 30 miles in slow Devon lanes. I thought about condensation, but in 20 years of motoring, I never saw such a large quantity of mayo. When I removed the cover last Sunday, it was all covered with a 4/5 mm of the stuff !!! I ll try to give it a good run and see. Thanks, Laurent

B20F · Dec 20th, 2007, 08:53

It could be that the carterventilation is blocked. Check the oiltrap and the tube between it and the airfilter. Also check the tube between oilfillercap and manifold. If you find the cure it's better to replace oil + filter.

rogerthechorister · Dec 20th, 2007, 08:56

Flush and change oil might help.

Laurent · Dec 20th, 2007, 10:07

It is a South African built 164, and, among other oddities, the crankcase ventilation inlet is not on the distributor side of the engine but I dont know where. Anybody any clue ?
Thanks all for your help, Laurent

B20F · Dec 21st, 2007, 10:54

Do you mean the fitting for the oiltrap is plugged off? Or is there no possibility to put a oiltrap as there is no fitting? There must be some kind of crankcase ventilation, check for a hose running from the airintake and follow that.

Laurent · Dec 22nd, 2007, 10:20

Hi, the crankcase ventilation on early B30 engine was different. It consisted of 2 pipes on the rocker cover, one air inlet and one oily gases outlet. The system was not very efficient because of condensation/mayo build up and I found out in
http://www.volvo1800chassis.com/work...op_engDir=DESC
that Volvo issued a bulletin to modify these engines with the side oil trap.
I am going to try that, and hopefully, that will be the end of the mayo in my engine.....

Dec 19th, 2007, 16:51	#1
Laurent New Member Last Online: Apr 17th, 2008 17:09 Join Date: Mar 2007 Location: moretonhampstead	mayo in rocker cover Hi, my B30A started to produce a lot of creamy mayo in the rocker cover for about 2 months. There is no oil in the cooling water and vice-versa. The car works fine and doesnt seem to use water. Any idea? Thanks, Laurent

Dec 19th, 2007, 16:53	#2
niloc SWV Benefactor Last Online: Jan 30th, 2013 13:44 Join Date: Dec 2001 Location: Newport, South Wales	Are you using the car much? Any long journeys? If not, take it for a blast down the motorway - it's a build up of condensation caused by short journeys... __________________ Refitting is the reverse of removal???.....Yeah, right!

Dec 20th, 2007, 08:53	#4
B20F Master Member Last Online: Jul 7th, 2016 21:43 Join Date: Mar 2007 Location: Zeist View Photos By: B20F	It could be that the carterventilation is blocked. Check the oiltrap and the tube between it and the airfilter. Also check the tube between oilfillercap and manifold. If you find the cure it's better to replace oil + filter. __________________

Dec 20th, 2007, 08:56	#5
rogerthechorister Rogerthechorister Last Online: Dec 16th, 2023 02:15 Join Date: May 2006 Location: Rochester	Flush Flush and change oil might help.

Dec 21st, 2007, 10:54	#7
B20F Master Member Last Online: Jul 7th, 2016 21:43 Join Date: Mar 2007 Location: Zeist View Photos By: B20F	Do you mean the fitting for the oiltrap is plugged off? Or is there no possibility to put a oiltrap as there is no fitting? There must be some kind of crankcase ventilation, check for a hose running from the airintake and follow that. __________________

Dec 19th, 2007, 17:15	#3
Laurent New Member Last Online: Apr 17th, 2008 17:09 Join Date: Mar 2007 Location: moretonhampstead	Thanks for quick answer. The car is used daily by my wife to do about 30 miles in slow Devon lanes. I thought about condensation, but in 20 years of motoring, I never saw such a large quantity of mayo. When I removed the cover last Sunday, it was all covered with a 4/5 mm of the stuff !!! I ll try to give it a good run and see. Thanks, Laurent

Dec 20th, 2007, 10:07	#6
Laurent New Member Last Online: Apr 17th, 2008 17:09 Join Date: Mar 2007 Location: moretonhampstead	It is a South African built 164, and, among other oddities, the crankcase ventilation inlet is not on the distributor side of the engine but I dont know where. Anybody any clue ? Thanks all for your help, Laurent

Dec 22nd, 2007, 10:20	#8
Laurent New Member Last Online: Apr 17th, 2008 17:09 Join Date: Mar 2007 Location: moretonhampstead	Hi, the crankcase ventilation on early B30 engine was different. It consisted of 2 pipes on the rocker cover, one air inlet and one oily gases outlet. The system was not very efficient because of condensation/mayo build up and I found out in http://www.volvo1800chassis.com/work...op_engDir=DESC that Volvo issued a bulletin to modify these engines with the side oil trap. I am going to try that, and hopefully, that will be the end of the mayo in my engine.....

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