will switching off the engine when bike is hot cause damage?

[prettymussel]

just wondering, after a ride the engine is hot and everything..

 

when u switch off the engine, sometimes u will be able to hear a ticking noise..

what is the noise caused by?

 

and will the engine be damaged if u switch it off immediately after a ride?

[GuiNNeSS]

If you don't switch it off, it will only get hotter.

 

Answer is 'no'.

[fleas]

thats a pretty good and short answer :>

[darkhorse2009]

I also want to know why got the ticking sound from the engine ( I think ) after switching off engine. Can anyone answer that ?

[apekyano]

im not an expert or wad..

but i think the sound is caused due to the hot metal parts slowlyyy cooling down...

usually i hear that on my endcan area..

correct me if im wrong..

[kinwei]

The sound is caused by metal contracting or expanding. Most of the time is contracting when you switch off engine.

[aRcHeR]

then what are you gonna do upon reaching your destination? keep the bike running?

 

DUH!!!!!

[fleas]

if you observe cars that just parked, they will also make a ticking noise

[prettymussel]

If you don't switch it off, it will only get hotter.

 

Answer is 'no'.

 

thats a pretty good and short answer :>

 

then what are you gonna do upon reaching your destination? keep the bike running?

 

DUH!!!!!

 

brudders, thks for ur answers. but i think i didnt phrase my original question correctly so i guess i had it coming.

 

anyway wat i intended to ask was, whether to switch off immediately after some hard riding, or shld we keep the RPM low for the last few min before our destination..

 

maybe this is clearer..

[amsyar]

Contracting of metal mostly from the exhaust side

Its normal.

 

brudders, thks for ur answers. but i think i didnt phrase my original question correctly so i guess i had it coming.

 

anyway wat i intended to ask was, whether to switch off immediately after some hard riding, or shld we keep the RPM low for the last few min before our destination..

 

maybe this is clearer..

 

Frm my service manual, it stated, idle the engine for awhile and then switch the engine off.

[prettymussel]

I also want to know why got the ticking sound from the engine ( I think ) after switching off engine. Can anyone answer that ?

 

im not an expert or wad..

but i think the sound is caused due to the hot metal parts slowlyyy cooling down...

usually i hear that on my endcan area..

correct me if im wrong..

 

The sound is caused by metal contracting or expanding. Most of the time is contracting when you switch off engine.

 

thks for ur answers guys.. yup i do hear the sound frm cars n other bikes, and i guess its normal for the sound.

 

so with the metal parts contracting, how come there is a sound produced, and y is the sound a ticking noise?

ok maybe this is going slightly into the scientific aspect already, but i was just curious.

[prettymussel]

Contracting of metal mostly from the exhaust side

Its normal.

 

Frm my service manual, it stated, idle the engine for awhile and then switch the engine off.

 

wahahha looks like i gotta take a better look in my manual too!

[biting_point]

if you dun off your bike after a ride, idling only will make it hotter..

 

It wun harm your engine, continously running it will..

 

the sounds are from the contracting metals..

my friend's disc rotors are contracting and making sounds even 1 hr after he parked his car..

[Paladin]

so with the metal parts contracting, how come there is a sound produced, and y is the sound a ticking noise?

ok maybe this is going slightly into the scientific aspect already, but i was just curious.

 

ask your kettle, some kettle pot makes the ticking sound when heated or cooled. I believe they are those mainly with joint parts (eg. 2 piece metal, one is the top and the other the base)

[GuiNNeSS]

brudders, thks for ur answers. but i think i didnt phrase my original question correctly so i guess i had it coming.

 

anyway wat i intended to ask was, whether to switch off immediately after some hard riding, or shld we keep the RPM low for the last few min before our destination..

 

maybe this is clearer..

 

hi pretty.....

 

Erm.... answer is still same. Leaving the engine running will just cause more heat build up.

 

As to keeping your RPM low... I would say it has negligible effect. Your bike if properly maintained, should be operating within it's acceptable temperature range (even if you been whacking it like a madman).

 

In fact if anything slowing down will only cause less air to flow through the radiators thus reducing the heat exchange.

 

If you look at F1 and MotoGP, you see end of race, they reach pits they just off engine. Bear in mind they face much greater heat and nowadays their machines have to last longer than 1 race.

[Demon]

If TS is referring to a turbo charged bike, then everyone gave the wrong advice

 

[prettymussel]

yeah i know that leaving the bike idling will only make it hotter..

 

anyway i was reading this http://www.singaporebikes.com/forums/showthread.php?t=67476

Engine etiquette

The way you treat your engine, from cold start to switching off hot and ticking, has a huge effect on its life and performance

thats where i got the idea that "switching off hot n ticking" might be bad for the engine..

subsequently in the article there was no elaboration on the point, so i figured maybe post the question in the forum..

 

thks for the answers everyone!

[xXxRatedxXx]

yep today observe my friends z1000 after turning off the engine after alot of start stop riding in town.... his 4 exhuast pipes were ticking away madly like a timebomb as compared to my small 2b single cylinder...

[DeusExMachina]

brudders, thks for ur answers. but i think i didnt phrase my original question correctly so i guess i had it coming.

 

anyway wat i intended to ask was, whether to switch off immediately after some hard riding, or shld we keep the RPM low for the last few min before our destination..

 

maybe this is clearer..

 

 

 

Just switch it off. No harm.

 

When you turn off that engine, the temp will rise a bit for a couple of minutes then drop off.

 

This is normal, as the coolant flowing when the engine is running mitigates the heat buildup. As soon as you turn it off, the coolant flow stops and the temps will go up awhile more... but since the engine has stopped, there's no more source of heat. The build up will cease and temps will drop off eventually.

[DeusExMachina]

To add. Temps for a big bike are likely to be about the same after you've run it hard, or if you've let it idle around for 2 minutes. If you look at bikes like the R1, for eg.... it runs so hot that less than 30 secs after stopping at the traffic lights, it goes over 100C and the fan kicks in. When running it at high RPMs, temps are likely to stay in the 90s, due to air running thru the radiator cooling the circulating coolant.

 

So suppose you let the bike idle for a couple of minutes after you've reached your destination and let the temps build to a boil then turn it off.... what the hell is the difference from turning it off immediately after a hard ride???

[prettymussel]

Just switch it off. No harm.

 

When you turn off that engine, the temp will rise a bit for a couple of minutes then drop off.

 

This is normal, as the coolant flowing when the engine is running mitigates the heat buildup. As soon as you turn it off, the coolant flow stops and the temps will go up awhile more... but since the engine has stopped, there's no more source of heat. The build up will cease and temps will drop off eventually.

 

To add. Temps for a big bike are likely to be about the same after you've run it hard, or if you've let it idle around for 2 minutes. If you look at bikes like the R1, for eg.... it runs so hot that less than 30 secs after stopping at the traffic lights, it goes over 100C and the fan kicks in. When running it at high RPMs, temps are likely to stay in the 90s, due to air running thru the radiator cooling the circulating coolant.

 

So suppose you let the bike idle for a couple of minutes after you've reached your destination and let the temps build to a boil then turn it off.... what the hell is the difference from turning it off immediately after a hard ride???

 

yup my bike heats up super quickly even if i'm not stationary, but riding in slow traffic.

so i guess at the end of the day the ideal state will be to have as cool an engine as possible!

[ronaldinho]

after a long day of riding, i'd like to splash my bike with water and see it sizzle. Especially during heavy rain

[Constructicon]

I will be more concerned about a bike being overheated than cooling down.

 

Side track by 1 degree:

Well, I dont know about you guys, but I do not cover my bike until 1-2 hours after a ride.

Let it cool down 1st.

Bcos if I do so, the bike cover essentially will trap all the heat under the cover the roast the bike for hours. Basically a sauna for all the electrics and stuff under the cover w/o any wind to drive away the heat.

Edited January 18, 2010 by Constructicon

[DeusExMachina]

I will be more concerned about a bike being overheated than colling down.

 

Side track by 1 degree:

Well, I dont know about you guys, but I do not cover my bike until 1-2 hours after a ride.

Let it cool down 1st.

Bcos if I do so, the bike cover essentially will trap all the heat under the cover the roast the bike for hours. Basically a sauna for all the electrics and stuff under the cover w/o any wind to drive away the heat.

 

Yeah. This makes more sense.

 

Don't cover the bike after a ride. Let it cool in the open first.

 

I do that when I'm out.

But when going home at night, I just don't care. I cover it immediately and go home.

 

After all, I don't pay season parking.

And I'm too lazy to come back down after a half hour to find a fuccking parking ticket.

[antartica]

to add on to the thread rather than start a new one

 

does any one turn off the ignition if you hear your fan running as you park?

 

for me, if i hear my fan running, i'd let it stop before turning everything off...

 

is that right or unecessary?

 

p/s riding spec III