Dodgefran Posted September 3, 2009 Report Share Posted September 3, 2009 Hi All, Clockwise and Counter Clockwise has been discussed a lot here. I've searched the threads, but need to know from what perspective is it clockwise. If I stand in the front of the car, which way is the fan/engine rotating? Clockwise or Counter Clockwise? My engine hasn't been run for three years and I forgot. Thanks. Quote Link to comment Share on other sites More sharing options...
kencombs Posted September 3, 2009 Report Share Posted September 3, 2009 The unofficial standard for such things is 'as viewed from the operators seat'. Same is true for left/right, starboard etc. Aircraft, boats, heavy equipment, almost everyone uses this. Sitting in the driver's seat, the fan turns counterclockwise, and blows air from the radiator to the engine. Also, with some really rare exceptions,(like boats with dual engines) all car/truck/industrial engines turn this way. In some installations, the engines are reversed, like garden tractors or such and folks think the engine rotates different. Not true, the perspective changed, not the engine. Quote Link to comment Share on other sites More sharing options...
grey beard Posted September 4, 2009 Report Share Posted September 4, 2009 Man, you guys are waaaaay aheada' me on all this testchnical stuff. I always wondered . . . . . . what is REALLY clockwise - what I see when I look at a clock on the wall, or what the clock sees when he (she?) looks out at his/her own hands. This stuff sure confuses me . . . AND are degrees BTDC usually in Farenheit or Centigrade? Are degrees ATDC gonna' be the same as BTDC, too? Come on, somebody hep me out'chere, huh? Quote Link to comment Share on other sites More sharing options...
Niel Hoback Posted September 4, 2009 Report Share Posted September 4, 2009 Those degrees are in BTU's. Metric BTU's. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted September 4, 2009 Report Share Posted September 4, 2009 not throwing any fricking bones out today.. Quote Link to comment Share on other sites More sharing options...
TodFitch Posted September 4, 2009 Report Share Posted September 4, 2009 The unofficial standard for such things is 'as viewed from the operators seat'. ...snip... My unofficial standard is the direction I turn the crank if/when I decide to hand crank the engine: Stand on the passenger side, engage the crank so the handle is down, then pull the handle up and toward you. That works out as clockwise as viewed from the front of the engine. Now you post-war car guys don't have a hand crank to put in and try this, so you will have to take it on faith. And, yes, looking a the angle of the blades on the fan will also give you the same information as the fan needs to pull air through the radiator. Quote Link to comment Share on other sites More sharing options...
B-Watson Posted September 4, 2009 Report Share Posted September 4, 2009 Man, you guys are waaaaay aheada' me on all this testchnical stuff. I always wondered . . . . . . what is REALLY clockwise - what I see when I look at a clock on the wall, or what the clock sees when he (she?) looks out at his/her own hands. This stuff sure confuses me . . . AND are degrees BTDC usually in Farenheit or Centigrade? Are degrees ATDC gonna' be the same as BTDC, too? Come on, somebody hep me out'chere, huh? Since a clock cannot see, clockwise or counterclockwise is what YOU see. And since a clock is inanimate, it is neither he nor she. A clock is an "it". BTDC and ATDC are degrees in a circle - all 360 of them. Thus a 180 degree turn is ending on the direct opposite side from where you started. A 360 degree turn is ending up where you started. Farenheit and Centigrade are degrees in temperature. As are Celsius (actually another name for Centigrade) and Kelvin. When you set the timing on your car you are setting the point on the crankshaft rotation at which your spark plugs fire, not its temperature when it fires. BTDC - Before Top Dead Centre ATDC - After Top Dead Centre 10 degrees BDTC is on the other side of TDC from 10 degrees ATDC. Bill Vancouver, BC Quote Link to comment Share on other sites More sharing options...
Frank Elder Posted September 4, 2009 Report Share Posted September 4, 2009 BTDCW B.Watson top dead center again! Quote Link to comment Share on other sites More sharing options...
grey beard Posted September 4, 2009 Report Share Posted September 4, 2009 Wow, I have been schooled. Sure do feel better, now that's all cleared up. Shows to go ya' whatcha' can learn when ya' keep yer trap shut . . . . Buttttttt . . . . . . Still wonderin' about them BTU's . . . How'd them things get out? My furnace ain't even runnin' yet . . . Quote Link to comment Share on other sites More sharing options...
Normspeed Posted September 4, 2009 Report Share Posted September 4, 2009 Since a clock cannot see, clockwise or counterclockwise is what YOU see. Personally my clock can see. It's "watching" me right now. Quote Link to comment Share on other sites More sharing options...
Niel Hoback Posted September 5, 2009 Report Share Posted September 5, 2009 Of course it is, look at its face! Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted September 5, 2009 Report Share Posted September 5, 2009 Buttttttt . . . . . . Still wonderin' about them BTU's . . . How'd them things get out? My furnace ain't even runnin' yet . . . That one is easy.... Them BTU's get out as gas butt they get in as calories. Hum, do I have that right? I think they get out as butt gas (not gas butt) but they get in as calories or something like that. Quote Link to comment Share on other sites More sharing options...
Dodgefran Posted September 7, 2009 Author Report Share Posted September 7, 2009 I don't know much about butt gas (aka gas butt), but if someone "Clocks" someone else, would striking with the other hand be considered a "CounterClock" ? Thanks guys. It's nice to see that others have a sense of humor. Quote Link to comment Share on other sites More sharing options...
Niel Hoback Posted September 7, 2009 Report Share Posted September 7, 2009 and if the guy doing the "clocking" is good at it, he would be known as counter-clock-wise. Enough already. Quote Link to comment Share on other sites More sharing options...
grey beard Posted September 7, 2009 Report Share Posted September 7, 2009 Downright shameful what a couplea' us guys and our shaggy senses of humor can do to one poor man's honest and well-intended thread. I'm not sure if anyone really cared enough to answer his original question . . . we were all havin' too much fun wordsmithing, what? Quote Link to comment Share on other sites More sharing options...
TodFitch Posted September 7, 2009 Report Share Posted September 7, 2009 Downright shameful what a couplea' us guys and our shaggy senses of humor can do to one poor man's honest and well-intended thread. I'm not sure if anyone really cared enough to answer his original question . . . we were all havin' too much fun wordsmithing, what? I think there were a couple of straight answers early in the thread. I hope the fellow found that stuff.... Quote Link to comment Share on other sites More sharing options...
MiltYergens Posted September 9, 2009 Report Share Posted September 9, 2009 Back in the early 70's I was overhauling a slant six. I read in a magazine article that a marine cam was an upgrade from a stock one. I searched for a vendor and naturally in the marine business. I remember staring of the back window of the office as I made the call. THe voice on the other end quoted a price and then asked the question I will always remember "Clockwise or counter clockwise rotation?" I froze for what seamed like an hour then wispered... clockwise.. and endured the long wait to see if the engine would start.. IT DID... The easy way is to think of the gears in the rear end.. the ring is on the drivers side for the pinion the transmission in forward gears so the engine turns the same as the pinion.. going forward, the front edge of the ring moves down, that means the drivers side of the pinion moves down too. and if can remember the second hand on a analog clock.. from the front this is the same movement as the pinion... Quote Link to comment Share on other sites More sharing options...
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