Eric: Do not take my word for this but this is the way I see things & am willing to bet you will find much agreement here from the "Old Farts" among us.
Oil will be more viscous when cold than when hot and will suffer a pressure drop when it warms though much less so with multi-Viscosity oils. (IE: 10w40, 20w50 and the like. Also at lower rpm the pressure will likely be much lower than at cruise settings which is normal. I know this from the days when I had older cars before they went to "Idiot Lights" to save a few bucks on their manufacture. The question is what should these readings normally be. These are importent to establish a "Base Line" so you can tell if there is a failure developing as the engine degrades with wear & tear. Idiot lights are operated by a pressure switch that is designed to close at a minimum pressure addequate for the safe engine operation but that gives precious little warning if you are at 10,000 ft and a long way from an airport and your oil gets hot, run out of oil or a main bearing starts to fail. The pressure & Oil temp. guages will allow you more warning of a problem so you have time to get out of harms way and to a "Safe Harbor". I suggest that you go to qualified source, maybe even VW to find what the operating range parameters are and note them in your op. manual for a permanent reference. Don Burlington IA ----- Original Message ----- From: "Eric Evezard" <[email protected]> To: "KR News" <[email protected]> Sent: Tuesday, April 17, 2007 1:47 PM Subject: KR> Oil Temp/pres. > Netters , > My type 4 VW was remanufactured by a VW factory and I received it with an > oil pressure switch mounted near the distributor hole.This switch was > intended to operate a red oil pressure warning light.I replaced this with > an oil pressure and red light sender to an oil pressure gauge and of > course a warning light.The warning light works well but the gauge seems to > go from a high reading to a low reading when the oil warms up and of > course with revs.reducing.The gauge may be suspect , or this may not be > the correct place to measure oil pressure.After all this location was only > designed to switch a warning light on and off.I have only done static run > ups but next time I will see if the oil pressure reading stays constant > at constant revs. > Oil temperature,hangs around 200 deg fahrenheit,during static run ups.The > gauge seems to take a long time to start moving and settling.The sender is > located ,looking from the prop front.on the lower right hand side of the > engine.There was a hole to the right of the sump,slightly above the > sump,And I made a a sealed cover plate with a thread to accept the sender. > Perhaps this will help with your oil questions netters.Oil pres.and > temp.is still on my list for final checking. > Best Regards, > Eric, > South Africa > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to [email protected] > Post photos, introductions, and For Sale items to > http://www.kr2forum.com/phpBB2/index.php > please see other KRnet info at http://www.krnet.org/info.html >
