On turbocharged diesel engine...

**attyallanlatras** · July 23rd, 2019 08:27 AM

Most of the time I only use my 2016 Fortuner in the city and only on few occasions I use it to go to province. Now since city driving is what I am used to, there were some occasions where going to the province ang cruising around 100kl/h, I forgot to turn off the engine only after 5 mins or so and instead turned it off immediately. Would this destroy my engine?

I would say that before I reach the destination and turn off the engine, I would slow down (but still running around 30-40kl/h) for about 20-15mins or so... would that be any consolation and consider the engine as having cooled off during that slow down?

I am a noob here...

**sparc179** · July 23rd, 2019 08:44 AM

Originally Posted by attyallanlatras

Most of the time I only use my 2016 Fortuner in the city and only on few occasions I use it to go to province. Now since city driving is what I am used to, there were some occasions where going to the province ang cruising around 100kl/h, I forgot to turn off the engine only after 5 mins or so and instead turned it off immediately. Would this destroy my engine?

I would say that before I reach the destination and turn off the engine, I would slow down (but still running around 30-40kl/h) for about 20-15mins or so... would that be any consolation and consider the engine as having cooled off during that slow down?

I am a noob here...

After a long drive at high speeds, I always allow my TD engine also to 'cool down' by idling even for just one minute before shutting it down. That's SOP for us. But like you atty., I drive a bit slower when almost reaching my destination so that helps also.

I've been told that the worst practice is to be always at full throttle everywhere you go even for short distances and immediately shutting down the engine. That's a big no-no for me.

HTH.

**oj88** · July 23rd, 2019 08:46 AM

Originally Posted by attyallanlatras

Most of the time I only use my 2016 Fortuner in the city and only on few occasions I use it to go to province. Now since city driving is what I am used to, there were some occasions where going to the province ang cruising around 100kl/h, I forgot to turn off the engine only after 5 mins or so and instead turned it off immediately. Would this destroy my engine?

I would say that before I reach the destination and turn off the engine, I would slow down (but still running around 30-40kl/h) for about 20-15mins or so... would that be any consolation and consider the engine as having cooled off during that slow down?

I am a noob here...

That’ll do. Most of the time after a highway drive, we usually encounter slower traffic as we near our destination (ie. More intersections and traffic lights, finding a parking spot, etc.) The time spent there will be enough to cool it down.

**Lin Dan** · July 23rd, 2019 09:46 AM

My friend loves to drive his fortuner on "sports/power" mode. Does it mean that the turbo is engaged in most cases?

**Egan101** · July 23rd, 2019 10:19 AM

Originally Posted by Lin Dan

My friend loves to drive his fortuner on "sports/power" mode. Does it mean that the turbo is engaged in most cases?

Peak torque is attained when the turbocharger starts spooling. For turbo diesels, it is within 1500 to 3600 rpm. Sports mode in most vehicles is a setting when the throttle is more responsive to attain higher rpms.

For turbo gas engines, peak torque is attained between 1500 to 5500 rpm. Euro gas turbo cars tend to spool its turbo earlier (1500 rpm) while most Japanese gas turbo cars have it past 2k rpm.

**sparc179** · July 23rd, 2019 10:35 AM

Originally Posted by Lin Dan

My friend loves to drive his fortuner on "sports/power" mode. Does it mean that the turbo is engaged in most cases?

Most turbos are activated around the 2.5K to 3K RPM range so if he keeps it at that range of power then yes AFAIK

**Egan101** · July 23rd, 2019 10:44 AM

Originally Posted by sparc179

Most turbos are activated around the 2.5K to 3K RPM range so if he keeps it at that range of power then yes AFAIK

2500 rpm is a bit late in the rev range for a turbo diesel. That's more like a Japanese gas turbo engine.

Problem with turbo diesels is that after the initial rush of that peak torque at the low rev range (1500-2500), the engine's output flattens out when nearing 4k rpm.

**ice15** · July 23rd, 2019 10:51 AM

AFAIK...

Yung previous gen Fortuner (Toyota D4D), around 2,000rpm bago mag kick-in yung turbo..

So as long as the turbo is not activated, you'll be fine.

**XTO** · July 23rd, 2019 11:30 AM

Originally Posted by attyallanlatras

Most of the time I only use my 2016 Fortuner in the city and only on few occasions I use it to go to province. Now since city driving is what I am used to, there were some occasions where going to the province ang cruising around 100kl/h, I forgot to turn off the engine only after 5 mins or so and instead turned it off immediately. Would this destroy my engine?

I would say that before I reach the destination and turn off the engine, I would slow down (but still running around 30-40kl/h) for about 20-15mins or so... would that be any consolation and consider the engine as having cooled off during that slow down?

I am a noob here...

install a turbo timer to eliminate worries.