stouricks Posted September 28, 2020 Share Posted September 28, 2020 (edited) I cannot find how to post directly into the Motoring Forum, please move this. Just had some guys drive from Bkk to my home, 400km, to deliver things. On arrival they left the engine running, and I asked them to turn it off. They said that after such a long trip they had to let the engine 'relax'. Is this necessary or bu..s.it? Edited October 1, 2020 by metisdead ALL CAPS removed from topic title. Link to comment Share on other sites More sharing options...
Kwasaki Posted September 28, 2020 Share Posted September 28, 2020 Yeah some people do it, good for the turbo, you can a delay on engine cut out even after ignition keys are taken out and truck is locked. Link to comment Share on other sites More sharing options...
jastheace Posted September 28, 2020 Share Posted September 28, 2020 (edited) yeah, as kwasaki says. good to let the turbo cool down with engine at idle for a minute or so. especially if the turbos been used a lot. a 400km journey at full pelt, and you'll only be a few minutes, leave engine running. have heard a proper term for this, don't think it's 'relax' though, unless franky's on his way to hollwood? edit. i just googled it and it's called 'turbo cool down'. Edited September 28, 2020 by jastheace addendum Link to comment Share on other sites More sharing options...
JAS21 Posted September 30, 2020 Share Posted September 30, 2020 In some handbooks I have seen that it says to run engine at idle for a period before stopping engine. But the engines in Hybrid/PHEV’s where even when driving at high speed will shut off if you release the accelerator. So one would hope that they are designed to do so. The type of oil used in turbo charged cars is clearly important. Link to comment Share on other sites More sharing options...
Jitar Posted October 1, 2020 Share Posted October 1, 2020 Idling hot turbo charged engines for a few minutes at start and stop is a good idea. It was more critical with older design turbo's, with turbo timers being fitted to many trucks and heavy equipment to improve turbo life. Newer design turbo's with water jackets are less susceptible to damage so the cool down period has reduced and not always recommended by OEMs now. 1 Link to comment Share on other sites More sharing options...
Don Mega Posted October 1, 2020 Share Posted October 1, 2020 Yep every morning and night. work commute is 100km each way on the motorway and each end of the commute I let the rig idle for 5 mins and then leave the bonnet up. 1 Link to comment Share on other sites More sharing options...
mistral53 Posted October 3, 2020 Share Posted October 3, 2020 Yes - it is complete BS. As has been pointed out, the place you would benefit some is when e.g. getting gas on a German autobahn, after having hounded the car at 250 km/h for as long as the gas lasted. Assuming you do not live in a rest area on a German autobahn but a couple km from said exit, the turbo cooled way down. Moreover, Diesel engines run at much lower temperatures than gasoline engines, so there is even less of problem. And last but not least, engine oils used in modern engines are mostly of the synthetic variety, their tendency to coke is far lower than the mineral oils of yore. BTW, really high stressed turbos are water cooled - but that does not apply to the average pick-up truck in Thailand. 1 2 1 1 Link to comment Share on other sites More sharing options...
KeeTua Posted October 3, 2020 Share Posted October 3, 2020 1 hour ago, mistral53 said: Yes - it is complete BS. Complete BS? Apparently you know more about the workings of a Vigo D4D engine (diesel) than Toyota's engineering department. Cool down idle times are clearly stated in the owners manual for my pickup. If using synthetic oils its arguable that this is not necessary but why take the chance. Owner's manual recommends after driving: 80 km/hr idle 20 seconds 100 km/hr idle 1 minute over 100 km/hr for long distances idle 2 minutes Around town no idle time required 1 1 Link to comment Share on other sites More sharing options...
mistral53 Posted October 3, 2020 Share Posted October 3, 2020 4 hours ago, KeeTua said: Complete BS? Apparently you know more about the workings of a Vigo D4D engine (diesel) than Toyota's engineering department. Cool down idle times are clearly stated in the owners manual for my pickup. If using synthetic oils its arguable that this is not necessary but why take the chance. Owner's manual recommends after driving: 80 km/hr idle 20 seconds 100 km/hr idle 1 minute over 100 km/hr for long distances idle 2 minutes Around town no idle time required All you did is confirm my argument - or are you traveling at 100 km/h up to your driveway? And as for stopping at a gas station on a highway - read my comment again: from the time you get off the highway to pull up to a pump, you are very close to the 1 minute mark, too. But was not the question of the OP - it was the distance traveled, not the speed, which was claimed to be the reason for not shutting off the engine. That a manufacturer would want to protect himself to not incur warranty claims, and bakes in some extra safety is just prudent. Link to comment Share on other sites More sharing options...
Lacessit Posted October 3, 2020 Share Posted October 3, 2020 This is Thailand, get used to it. Today at the Big C, I parked next to a Toyota Hilux with its engine running. Window tint was so dark it was impossible to see inside. However, I saw the owner come back to the pickup with a trolley full of shopping. I can only speculate the engine was left running to keep the aircon going, so he had a nice cool cabin to come back to. Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 21 hours ago, KeeTua said: Complete BS? Apparently you know more about the workings of a Vigo D4D engine (diesel) than Toyota's engineering department. Cool down idle times are clearly stated in the owners manual for my pickup. If using synthetic oils its arguable that this is not necessary but why take the chance. Owner's manual recommends after driving: 80 km/hr idle 20 seconds 100 km/hr idle 1 minute over 100 km/hr for long distances idle 2 minutes Around town no idle time required So why does a Vigo handbook quote idling times at shutdown, quoting advised idle times for a given speed used before shutdown...? Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 1 minute ago, transam said: So why does a Vigo handbook quote idling times at shutdown, quoting advised idle times for a given speed used before shutdown...? because its an old truck with old technology requiring old ideal's. Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 4 minutes ago, Don Mega said: because its an old truck with old technology requiring old ideal's. No, 2015 isn't old, or is it to you.? The turbo is not water cooled, it relies on the oil pulling heat away as the turbo slows, which in itself takes quite a while.... Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 3 minutes ago, transam said: No, 2015 isn't old, or is it to you.? 20 year old engines, hardly new are they !! Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 1 minute ago, Don Mega said: 20 year old engines, hardly new are they !! Your point is....? Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 Just now, transam said: Your point is....? because its an old truck with old technology requiring old ideal's. Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 5 minutes ago, Don Mega said: because its an old truck with old technology requiring old ideal's. Perhaps you should read the thread title again chap......???? Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 3 minutes ago, transam said: Perhaps you should read the thread title again chap......???? Perhaps you should not ask questions you won't like the answer to, Bro.......???? 1 Link to comment Share on other sites More sharing options...
stouricks Posted October 4, 2020 Author Share Posted October 4, 2020 On 9/28/2020 at 9:46 PM, Kwasaki said: you can a delay on engine cut out even after ignition keys are taken out and truck is locked. Please tell me how. When I turn the key to the off position the engine stops. 1 Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 I have answered the OP's question. ???? And just for you..Upto 2015 Vigo ....Turbo care, idling.... Normal city driving.......Not needed. Highway driving 80km/h.....20 seconds. 100km/h.....60 seconds. Above 100km/h....120 seconds. 1 Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 2 minutes ago, stouricks said: Please tell me how. When I turn the key to the off position the engine stops. Aftermarket add-on... Look at my post above... 1 Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 3 minutes ago, stouricks said: Please tell me how. When I turn the key to the off position the engine stops. You fit a turbo timer. 1 Link to comment Share on other sites More sharing options...
Popular Post stouricks Posted October 4, 2020 Author Popular Post Share Posted October 4, 2020 6 minutes ago, Don Mega said: You fit a turbo timer. After 8 years and 200,000km with no problems, I shall not bother. Thanks for the info. 2 1 Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 7 minutes ago, stouricks said: After 8 years and 200,000km with no problems, I shall not bother. Thanks for the info. Whilst I do let mine idle for a few minutes after a high speed run down the motorway (force of habit owning turbo cars over the past 20 years) it really is not needed on modern day diesels. 1 Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 17 minutes ago, Don Mega said: Whilst I do let mine idle for a few minutes after a high speed run down the motorway (force of habit owning turbo cars over the past 20 years) it really is not needed on modern day diesels. Think I would rather check my handbook before making assumptions...???? Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 Just now, transam said: Think I would rather check my handbook before making assumptions...???? As should every owner. My manual does not instruct me to idle the vehicle after a high speed run but I do. Link to comment Share on other sites More sharing options...
Kwasaki Posted October 4, 2020 Share Posted October 4, 2020 59 minutes ago, Don Mega said: As should every owner. My manual does not instruct me to idle the vehicle after a high speed run but I do. I don't know if its mentioned in my Isuzu manual either, It's just something recommended by diesel turbo engineers as it keeps the turbo in a better longer life condition. 1 Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 1 minute ago, Kwasaki said: I don't know if its mentioned in my Isuzu manual either, It's just something recommended by diesel turbo engineers as it keeps the turbo in a better longer life condition. Its not just turbo diesels but all oil cooled turbo's and the reason to do it is to keep the oil flowing as the turbo cools down otherwise that bit of oil in the hot turbo can get cooked which is not good for the lifespan of the oil and also the possibility it can then damage the turbo. 1 Link to comment Share on other sites More sharing options...
transam Posted October 4, 2020 Share Posted October 4, 2020 Just now, Don Mega said: Its not just turbo diesels but all oil cooled turbo's and the reason to do it is to keep the oil flowing as the turbo cools down otherwise that bit of oil in the hot turbo can get cooked which is not good for the lifespan of the oil and also the possibility it can then damage the turbo. Thought you said only on old rides....???? Link to comment Share on other sites More sharing options...
Don Mega Posted October 4, 2020 Share Posted October 4, 2020 8 minutes ago, transam said: Thought you said only on old rides....???? Yes, recommenced for old rides some even mention it in the owners hand book. modern technology and modern oils it is not as critical, thats why its not mentioned in the owners manual..... well not my Ranger one anyways and neither the Nissan pickup I just sold and from what Kwaksaki mentioned most likely not the Izuzu one either. Link to comment Share on other sites More sharing options...
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