Cold start and glow plug

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Joined
Aug 16, 2023
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Location
Kampala
I have always known how to start my Landcruiser diesel in the mornings. BTW, I live in a hot climate area - so there is nothing like cold anyway. Ambient temperatures are in the average of 30 degree Celsius. Very cold mornings (very rarely) can go as low as 18 degrees Celsius.

In the morning, I put the engine switch on and wait for the glow plug light on the dashboard to go off before I start the engine. In any case, the glow plug light just takes about 1 second to go off. I have never had any problem with this method, which is even in line with the car manual. For all the six years I have had the car, it always starts one-click, whether morning or any other time. I am not complaining. I am happy.

Now, my mechanic is telling me that in the morning it is better to put the switch on, wait for pug light to go off, then switch off. Then he says I should repeat this process three times before I start the engine. Is this right? He says one benefit is that the engine will warm faster. Currently, it takes about 2-3 miles before engine temperature reaches optimal. I have no problem with this at all because this is a big engine. My other diesel car takes about half a mile to reach optimal temperature, but I understand that it is because it has a smaller engine.

What are your experiences?
 
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No experience with these diesels, but on older VW diesels you would only possibly do this on extra cold days. But only if you had a healthy battery as too many glow cycles would kill the battery.

Newer TDIs would not let you run repeat long cycles as the ECU sees it and cuts the cycles shorter.

Warm the engine up faster? Doubtful.

If the engine starts great why bother? You will only wear out your glow plugs faster the more cycles you do.
 
If the engine starts great why bother? You will only wear out your glow plugs faster the more cycles you do.
Sure, I won't bother. I am not complaining. My mechanic is simply overzealous.
 
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