Date: Sun, 20 Jan 2019 05:00:06 +0000
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: breather tower
In-Reply-To: <EBA4D869-470C-41DE-A6C4-F6353BED7A32@comcast.net>
Content-Type: text/plain; charset="iso-8859-1"
While the oil itself may be able to withstand temps that high there is a difference from hitting the bottom of hot pistons or cooling bearings and the "bulk" temperature of the oil in the sump getting that hot. Just like the cooling system there are parts that are much hotter than the temperature reading at the gauge. That is why it is so important for the cooling system to maintain pressure to prevent vaporization. Anyway, for the Waterboxer a lot of bad things happen when the oil temp gets out of control. The first is the drop in oil pressure. This is due to the oil viscosity dropping and over expansion of parts of the engine causing clearances to increase. VW added the oil cooler on the 2.1L engines to keep the oil temp close to coolant temp. At times it just isn't enough. Even with the oil cooler in Fun Bus oil testing has shown oxidation and nitration is happening, most likely due to high ring temp temps. Getting back to the oil tower question I have replaced many an o-ring at the base and the towers themselves du to them getting distorted or even melting where they sit on the crankcase.
Dennis
-----Original Message-----
From: OlRivrRat [mailto:OlRivrRat@comcast.net]
Sent: Saturday, January 19, 2019 10:11 PM
To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Cc: vanagon@GERRY.VANAGON.COM
Subject: Re: breather tower
On 19 Jan , 2019, at 2:23 PM, Dennis Haynes wrote:
> Again from overheating that seal can fail also. BTW the crankcase and engine oil can over heat even with the coolant temperature indicating all is normal. Enough speed and load or over filling can easily get the oil to 270F or more.
While 270ºF is Pretty Darned Toasty it is not OverHeated, Especially if using a High Quality Synthetic ~
The Mob1 15w50 is Good to 500ºF According to the Mob'Guys ~
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.mobil1racingstore.com%2Fmobil-1-15w50-122377-oil&data=02%7C01%7C%7C8a747041879d4e75c41708d67e84dbf9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636835506417353785&sdata=blJf79CgTU7jvvyUDjrfJEBFAGDKS5R0v7DYJRgPXIM%3D&reserved=0