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Date:         Tue, 19 Jul 2011 17:24:07 -0700
Reply-To:     Rocket J Squirrel <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Rocket J Squirrel <camping.elliott@GMAIL.COM>
Subject:      Re: Watching Oil Temp (long, as usual)
Comments: To: Jake de Villiers <crescentbeachguitar@gmail.com>
In-Reply-To:  <CACGkSd182swV3BUbJigP5m2suu1iHN5jBH=i9V2EFjL1sG3j7w@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Helps a lot -- thanks!

On Tue, 2011-07-19 at 16:38 -0700, Jake de Villiers wrote:

> The coolant pulls heat from the heads ie the roof of the combustion > chamber, the valve seats, the exhaust valve guides and ports and the > outside of the cylinder liners. > > The oil cools the cam lobes, lifters and valve tips, pistons, wrist > pins, rods, rod bearings, crank, crank bearings and the cylinder > walls. > > So you can see that the coolant is somewhat distant from the sources > of major heat, whereas the oil is right in the thick of things. This > is why you want an oil temperature gauge, so you can see what's going > on in the primary circuit, rather than waiting for the secondary > system to let you know. By the time your coolant temp is making you > aware that its having trouble removing the heat from the engine, the > oil temperature is through the roof. > > Now that you've got a better source of information, you'll have a > better idea of how hard that poor engine is really working. > > Oil temps are okay to 212 - 220 degrees F - any much more than that > would have me taking some ameliorating action ie slowing down or > pulling over, though driving slowly cools the internals more quickly. > > Does this help, Mike? > > > On Tue, Jul 19, 2011 at 3:56 PM, Rocket J Squirrel > <camping.elliott@gmail.com> wrote: > > On Tue, 2011-07-19 at 13:14 -0400, Edward Maglott wrote: > > > I'm pretty sure the coolant flows through the heads and that > is where it > > picks up most of the engine heat. > > > > > Oh -- okay. The only heads I've ever held were from an > aircooled. They > had no plumbing for coolant. > > So on the waterboxer, where is the oil picking up the extra > heat that > shows on the oil temp gauge but not the coolant gauge when the > engine is > under demand? > > -- RJS > > sent from my old aircooled heads > > > > > -- > Jake > > 1984 Vanagon GL 1.9 WBX - 'The Grey Van' > 1986 Westy Weekender/2.5 SOHC Subie - 'Dixie' > > Crescent Beach, BC > > www.thebassspa.com > www.crescentbeachguitar.com > http://subyjake.googlepages.com/mydixiedarlin%27 >


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