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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!noc.near.net!gateway!pictel!harling
- From: harling@pictel.com (Dan Harling)
- Subject: Re: Pressurize Oil Before Starting ?
- Message-ID: <1992Aug28.173058.15396@pictel.com>
- Sender: Dan Harling
- Organization: PictureTel Corporation
- References: <15200039@hpspdla.spd.HP.COM> <1992Aug25.131721.15149@dg-rtp.dg.com> <1992Aug25.194059.24000@tandem.com>
- Date: Fri, 28 Aug 1992 17:30:58 GMT
- Lines: 29
-
- In article <1992Aug25.194059.24000@tandem.com> norcott_bill@tandem.com (Bill Norcott) writes:
- >Mechanical wear is only one of many kinds of oil-related failures,
- >and oil-related failures are only one cause of engine failure. What
- >about the possibility of internal corrosion, cracked heads, mechanical
- >stress, broken timing belts, etc which can all wreck an engine? The
- >biggest cause of mechanical wear is on cold starts, that's the source
- >of the claim that most of the wear is in the first 10 seconds. On a
- >warm start this is not the case, there is hardly any wear. It's like
- >saying heart disease is the #1 cause of death so if we cured heart
- >disease we'd live a thousand years.
- >
- >Instead of paying $560 to pump the cold oil around, you can get an
- >engine block heater for less than $20 that heats the engine and the
- >oil before you start the car.
-
- The reason that less wear occurs on a "warm start" that a "cold start"
- is *not* the fact that all the parts are nice and warm, but the fact
- that there is still some oil left on the critical surfaces. The longer
- you leave an engine without running it, the more time the oil has to
- drain back to the bottom of the oil pan.
-
- I suppose a block heater would reduce the stress on parts due to
- temperature fluctuations, and maybe help it run more smoothly when you
- first start it, but it would do less than a pre-oiler for saving the
- main bearings.
- ____________________________________________________________________________
- Daniel A. Harling (harling@pictel.com)
- PictureTel Corp. Opinions expressed are not necessarily those of
- Peabody, MA 01960 PictureTel, but they ought to be!
-