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DO you let your car cool down?
4th Gear
Joined: Nov 2004
Posts: 4,153
From: Oswego, Illinois
RE: DO you let your car cool down?
usually if im driving sanly ill sit a few seconds and shuit her off otherwise if im driving like i stole it ill wait a few minutes before shuting down or driving easy for the last few miles of my journey
Senior Administrator
Joined: Feb 2005
Posts: 13,574
From: Lotsa places, currently Metro D.C., USA
RE: DO you let your car cool down?
I did when I drove a turbo 4 cyl, now that I'm haulin around what is effectively an extra 4cyl, under that hood I don't worry about it.
My Turbo Calibra (back in my European days) spolled up fairly early in the rpm band, so I was almost always ONboost, if I was driving at highway speeds (of course, casual highway speeds in Europe hover around 100mph, so that MIGHT have played a part, too). I was lucky in that almost 90% of my drivcing required a certain amount of normal (read: under 100mph) driving, at each end, so there was time to warm up AND cool-down the bearings before and after went from sub-light to WARP speed.
Giving the bearings time to cool down, as teh oil circulates around them, prevents coking, a process where the bearings sit in and cook a fine coating of motor oil onmto themselves, if you shut 'er down IMMEDIATELY after a hot run. There are secondary pumps yyou cud hook up, to keep the oil circulating until the bearings reached a safe temp, available on the aftermarket.Anyone in the habit of doing this sort of duncery should invest in this sort of technology, or, sooner or later you'll have extreemly high-velocity projectiles flying around in close proximity to your engine. NOT a preferred situation. Coked bearings WILL eventually FAIL. When that happens those turbo blades, traveling at 15k, 20k, 25k RPM can take a lot of expensive stuff with them, when they decide to leave teh housing...
My Turbo Calibra (back in my European days) spolled up fairly early in the rpm band, so I was almost always ONboost, if I was driving at highway speeds (of course, casual highway speeds in Europe hover around 100mph, so that MIGHT have played a part, too). I was lucky in that almost 90% of my drivcing required a certain amount of normal (read: under 100mph) driving, at each end, so there was time to warm up AND cool-down the bearings before and after went from sub-light to WARP speed.
Giving the bearings time to cool down, as teh oil circulates around them, prevents coking, a process where the bearings sit in and cook a fine coating of motor oil onmto themselves, if you shut 'er down IMMEDIATELY after a hot run. There are secondary pumps yyou cud hook up, to keep the oil circulating until the bearings reached a safe temp, available on the aftermarket.Anyone in the habit of doing this sort of duncery should invest in this sort of technology, or, sooner or later you'll have extreemly high-velocity projectiles flying around in close proximity to your engine. NOT a preferred situation. Coked bearings WILL eventually FAIL. When that happens those turbo blades, traveling at 15k, 20k, 25k RPM can take a lot of expensive stuff with them, when they decide to leave teh housing...
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