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Date:         Mon, 15 Jul 1996 12:59:02 PDT
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         "VW Nut" <VWNUT@smus.bc.ca>
Subject:      Re: Wasserboxer cooling (was:Re: aftermarket instrumentatio

On 15 Jul 96 at 14:38, SyncroHead@aol.com wrote:

> I expect that you'll say - "Ahhh, that's only coolant temperature, What > about the oil temperature?" It is true that presently I am not able to > monitor oil temperature. Oil temperature can be much more volitile than > coolant temperature, but after a sustained period under extreme condiditions > the coolant temperature will inevitibly rise if oil temperature remains very > high. This would have been refelcted on the coolant temperature gage before > long & it wasn't. While I agree the w/b cooling system seems adequate so far on my '88 under normal conditions, I do find it cannot cope with 1st & 2nd gear travel for prolonged periods, even when keeping revs up to maintain coolant flow. I often stop too cool off after 20-30 minutes of rough road travel in these conditions. I must disagree with your conclusion about the relationship between oil & coolant temps, based on experience with my Jetta. I have a mechanical oil pressure gauge on my Jetta which also reflects oil temps somewhat. I find oil temp will climb slightly faster than coolant temp on hills as indicated by a quick drop of about 10psi in pressure. This is followed by coolant temp rise. However, the coolant temp will drop to normal in about 1 minute of flat driving, while the oil pressure will remain low for 5-10 minutes or more. I attribute the quick rise in oil temp to the turbo on my Jetta, but since it has the same oil-to-coolant exchanger as on the Vanagon, I suspect the cool down process of the oil is similar in the Vanagon. So a coolant gauge which has returned to 'normal' doesn't necessarily mean the engine oil is also 'normal'.

Shawn '88 Westy 332k (Kyra) '85 Jetta TD 350k (Jenni)


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