turbodiesel warmup question

[mikey177]

We've discussed before (long, long ago) that after a cold start in the morning, it is advisable to warm a turbodiesel engine up for a few minutes before the vehicle starts moving. We also discussed that a good alternative to waiting on idle for 10 or more minutes is to start off slowly after 3 or 4 minutes and not strain the engine too much before reaching normal engine temperature.

What i'd like to clarify is: when we say we shouldn't strain the engine, does it mean we should keep the RPMs below 2,000 (thus, we shift to the next higher gear before the tach hits 2,000 rpm) OR does it mean we should keep the vehicle speed below 60 kph?

If it's the former, i can reach a decent 70 kph in 5th gear while still staying below 2,000 rpm... but will doing so be more damaging to the engine in the long run?

Comments? Suggestions?

[ARB]

IMO, ten minutes is too long, the most important thing with turbo diesel is that you dont race the engine after starting it. i usually warm up two minutes then move the vehicle without aircon after the temp needle starts to move then i turn on the aircon and drive normally. running in 5th gear below 2000 may lag the engine with damages the engine more than revving it high.

[OTEP]

RPM ang important, hindi road speed. Hindi naman alam ng engine ang road speed, eh. Kasi dadaan pa siya sa transmission at differential.

Hindi ba you can also run at 30kph on almost redline? Same basic principle.

[boybi]

mga 2 mins lang din ako mag warmup. malaking strain na ba sa engine kapag naka on ang aircon?

[promdiboy]

i use autostart ng mannix alarm pag paalis na ako. laking ginhawa with turbo timer rin. di na kayo manghihinayang sa warm up and shut down.

[notEworthy27]

hmmm....diba may glow plug pa promdiboy?? or naka direct injection ka? well as for me as long as the temp. goes normal.pwede mag move. drive slowly muna ng unti para magcirculate ang oil and uminit ang other parts.

[notEworthy27]

turbo timers are great but are kinda expensive.

[promdiboy]

notEworthy27

no prob sa glow plug hinihintay niya muna mag green bago start, tsaka pag di nagstart within 5 secs pahinga muna bago restart uli, lapit na ako palit battery inuubos ko nalang. hehehe

[notEworthy27]

akala ko walang ganun for diesels...hmmm saan ka nakabili? alam ko kasi for gas ang merong ganon.

[altec]

After starting your car from a cold start, drive your car right away instead of idling it to warm up. You warm up the engine better if you drive it. Huwag mo lang ihataw. Even if you say 2-3K rpm, it depends on how you reach that rpm. E kung pedal to the metal ka sa cold start, from a full stop, strain talaga ang makina mo. Parang sports din yan, any sports. Warm up muna.

[gulliver]

for my turbo diesel Ford, i start the engine and let it run till it smoothens out...about 30 secs - 1 min, meaning the oil has worked its way through the engine a bit. tapos, engage and drive out, keeping my rpm below 2k (1st-4th gear). agree ako kay Otep, the engine doesn't recognize road speed. but in Baguio, for really cold morning starts, i let the engine idle for at least 5 minutes. reason being, when i hit the road out of the garage, akyatan at babaan kaagad, forcing rpms higher than 2k if you want to maintain control

Ford pretty much says, you can start (w/ the exception of waiting for the glow plug indicator to go off) & drive it like any gasoline-fed engine. the important part is allowing your engine to cool down after running highway speeds before switching the engine off...approx. 30 secs (i opt for a minute) at least. just my thoughts