Engine warming up procedure
Discussion
Did you guys see this months Evo under Ask The Experts?
Apparently, you are supposed to give the engine a couple of good blips when you first start it to make sure the oil is dispersed quickly, this is what race teams do with racing engines. You should under no circumstances subject the cold engine to any load.
I was always under the impression not to rev it too hard whilst cold, didn't realise just putting load on the engine (ie. pulling away) could also cause damage. The Porsche manual states to pull away immediately but that is to save the planet rather than for the longevity of the engine.
Apparently, you are supposed to give the engine a couple of good blips when you first start it to make sure the oil is dispersed quickly, this is what race teams do with racing engines. You should under no circumstances subject the cold engine to any load.
I was always under the impression not to rev it too hard whilst cold, didn't realise just putting load on the engine (ie. pulling away) could also cause damage. The Porsche manual states to pull away immediately but that is to save the planet rather than for the longevity of the engine.
I read that with interest too. I've previously been of a fast idle persuasion but sometimes you dont have time - eg. at a trackday as you're leaving to head out on track.
Apparently the higher end of the rev range is only harmful to an engine under load so presumably dipping the clutch and giving the engine a dose of blipping is simulating the way the racers warm up. It will, as stated in the evo answer, certainly get the oil splashed around and this can only be a good thing.
I'd still be reluctant to give it any more than about 4k on the blips though.
Apparently the higher end of the rev range is only harmful to an engine under load so presumably dipping the clutch and giving the engine a dose of blipping is simulating the way the racers warm up. It will, as stated in the evo answer, certainly get the oil splashed around and this can only be a good thing.
I'd still be reluctant to give it any more than about 4k on the blips though.
All the information you need is in the gauges on the dash. Water heats quicker than oil and your water temp will me the first to reach temp after a short distance. I keep the engine spped below 4k until the oil temp hits normal, maybe around 3 miles or so. As for warming it up, its best to warm it while driving not left ticking over on the drive. A car will reach temp much much quicker being driven gentley than being left idleing for ages before hand..try it, you can leave your car running for ages parked 15 mins and the oil is still not upto temp. Also its not just about heating the engine up.
The only reason the race teams rev engines is to get temp into them as quick as possible, and to read anysensor info, also to get out on the circuit ready to go as it were, its not about life of engine to them.
Start it drive it take its east til warm then go for it!
The only reason the race teams rev engines is to get temp into them as quick as possible, and to read anysensor info, also to get out on the circuit ready to go as it were, its not about life of engine to them.
Start it drive it take its east til warm then go for it!
toenheel said:
With regards to "racing teams doing it" they also have racing teams to repair them, i dont think i would consider this a good idea. Like somebody said previously i keep below 3000rpm till its warmed up then open it up a bit more.
That's why I think i'd employ a more moderated approach of blipping to about 4k. I'd only do it in a situation where it wasn't possible to get engine temperature up by a short idle and then gentle driving up to temp which is how I start all of my journeys - my example being when the car is started warm but is not hot and you're about to take it out on track.
The bloke in the mag who wrote the response was pretty assured that exercising through the rev range from cold does not cause damage and is a viable quick method of getting oil round the engine and accelerated warm up versus fast idling. It's cold revving under load which is the big no-no.
anglebox10 said:
Does anyone let their engine 'cool down' after a blast before switching it off ??
I've heard of some people doing this, not really done it myself though.
I've heard of some people doing this, not really done it myself though.
the pelican forum often discuss this,
and in conjunction with smoke on start up co-incidentally
as its reported to help prevent this,
although not read anything definitive on that yet
rich 36 said:
anglebox10 said:
Does anyone let their engine 'cool down' after a blast before switching it off ??
I've heard of some people doing this, not really done it myself though.
I've heard of some people doing this, not really done it myself though.
the pelican forum often discuss this,
and in conjunction with smoke on start up co-incidentally
as its reported to help prevent this,
although not read anything definitive on that yet
I think it's more useful for turbos that need to cool down after a 'blast'. I try and run for the last 3 mts of the journey below 3k revs so that the turbos slow down. If you stop suddenly than the turbos are still running, but without any oil feed.
Sorry might I might have been a bit clearer on that one,
& should have distinguished the Turbo bit,
(its I think) generally thought to 'ease' it back down a bit after a blat.
But also, it is often discussed on the non turbo's
its benefits in warming down if for slightly different reasons.
I normally never dream of switching off a hot motor just like that
thinking theres some benefit in it
& should have distinguished the Turbo bit,
(its I think) generally thought to 'ease' it back down a bit after a blat.
But also, it is often discussed on the non turbo's
its benefits in warming down if for slightly different reasons.
I normally never dream of switching off a hot motor just like that
thinking theres some benefit in it
Blipping a cold engine is a sure fire way to damage it. The rich mixture washes the oil from the bores and until the oil has had a chance to get to the top end you want to keep the revs as low as possible.
Start it, watch the oil pressure guage to make sure it's up to pressure and then just drive it sensibly until it's up to temperature.
Start it, watch the oil pressure guage to make sure it's up to pressure and then just drive it sensibly until it's up to temperature.
BliarOut said:
Blipping a cold engine is a sure fire way to damage it. The rich mixture washes the oil from the bores and until the oil has had a chance to get to the top end you want to keep the revs as low as possible.
Start it, watch the oil pressure guage to make sure it's up to pressure and then just drive it sensibly until it's up to temperature.
Start it, watch the oil pressure guage to make sure it's up to pressure and then just drive it sensibly until it's up to temperature.
Right on the button.
BliarOut said:
Blipping a cold engine is a sure fire way to damage it. The rich mixture washes the oil from the bores and until the oil has had a chance to get to the top end you want to keep the revs as low as possible.
Start it, watch the oil pressure guage to make sure it's up to pressure and then just drive it sensibly until it's up to temperature.
Start it, watch the oil pressure guage to make sure it's up to pressure and then just drive it sensibly until it's up to temperature.
Thats what I've been told is best,
more especially with a boxer engine layout
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