Been Thinking

[DiNoBoNeS]

this may be a very silly question but i am going to ask away any ways.... when is it time to get a engine rebuild or a new motor all together like how many kms? down the road my R34 is pushing 264,000 kms Dam that Melbourne trip and back to Perth from Geraldton was fun........ haha

I just put in New Spark Plugs and coil pack and my nasty Busted WRX Sounding motor is sounding way better now and not a WARNING light to be seen

So the question is how many kms before a new motor is needed?

Edited January 31, 2009 by DiNoBoNeS

[R32 Driver]

until it dies

depends how its been looked after

better = longer

no real number, lots of taxis run around with 600,000kms+

but they leave there cars on all the time and service very often

[DiNoBoNeS]

until it dies

depends how its been looked after

better = longer

no real number, lots of taxis run around with 600,000kms+

but they leave there cars on all the time and service very often

Tops thanks mate i try and look after her and do the right things i work as a photographer and i leave it running when i am shooting I am only with the guy/gal for like 4 minutes so no need to turn it off and on all the dam time... just was thinking if there was a kms number to do it or if it was the case of wait to it go hehe she is running strong and i do not think it will be for a while i can not wait for 300,000kms.

[mitchy_]

when it gets low compression, or has a fair bit of leakage.

leaving a car idling is not ideal either, the fuel isn't burnt correctly, and runs down the side of the bore, washing off the oil with it, and contaminating the oil.

[inthisglass]

your car will get hot if its just sitting there idling

best to just let it run for a minute or 2 then turn it off

rebuild it when it pops...

[R32 Driver]

your car will get hot if its just sitting there idling

best to just let it run for a minute or 2 then turn it off

rebuild it when it pops...

your car gets hot just idleing?

i dare say keeping it running > on and off all the time

[mitchy_]

why would keeping it running be better than turning it on and off?

that is, unless you want to waste fuel, and wash all the oil off your cylinders.

[inthisglass]

your car gets hot just idleing?

i dare say keeping it running > on and off all the time

yeh, if you had a digital temp gauge (i use my pfc hand controller) you would see

if your not driving and having air blowing through your cooler etc your car actually heats up at idle

not much but for example

my car usually operates at around 80-82 degrees

i sat in the car park and ate maccas with the air con on one hot day and the temp got up to 105 degrees and went back down after i started driving again

the day and air con did play a part so the temp rise isnt usually as big

best to turn it off..

[mitchy_]

yep.. the only time we realised we hadn't plugged my mates thermo fans back in, was when we pulled into the macca's drive though, and it started to get hot.

most fans will stop, or slow down when the car is moving.

[R32 Driver]

surely his extra 2 mins of idle (2 after driving)

wouldnt be that bad?

and isnt most damage done to engines when you first start it anyway?

[bubba]

yeh, if you had a digital temp gauge (i use my pfc hand controller) you would see

if your not driving and having air blowing through your cooler etc your car actually heats up at idle

not much but for example

my car usually operates at around 80-82 degrees

i sat in the car park and ate maccas with the air con on one hot day and the temp got up to 105 degrees and went back down after i started driving again

the day and air con did play a part so the temp rise isnt usually as big

best to turn it off..

That's pretty hot dude.. highest I've ever seen on my 30 is 104deg and that was after a couple of big smokey burnouts on a 40deg day!

FYI boiling point is around 110-115deg.

[bnr#@]

yeh, if you had a digital temp gauge (i use my pfc hand controller) you would see

if your not driving and having air blowing through your cooler etc your car actually heats up at idle

not much but for example

my car usually operates at around 80-82 degrees

i sat in the car park and ate maccas with the air con on one hot day and the temp got up to 105 degrees and went back down after i started driving again

the day and air con did play a part so the temp rise isnt usually as big

best to turn it off..

If your car is getting hotter when its idling then something is stuffed. When temps start to rise a bit the fan is suppose to kick in to pull air through and keep temps steady.

My temps don't rise one bit no matter if I'm moving or not. Sits on 73 deg all the time (PFC hand controller and new watter temp sensor). Car also runs an N1 watter pump which doesn't flow as much watter at idle as a normal watter pump and still no issues at all

[NA_Goodness]

95% of engine wear happens when the engine is cold. Thats why taxis engines start to go at 1,000,000kms, and trucks get their engines rebuilt when they clock back to 0 only because they can. I've worked on trucks with over 500,000kms with engines that are fine, and cars that have bearing noise at just over 200,00kms.

[mitchy_]

so what about cars with no oil around the pistons, and oil contaminated with fuel?

maybe we should all leave our cas on 24/7 then... only 5% engine wear!

[gazza750]

If your car is getting hotter when its idling then something is stuffed. When temps start to rise a bit the fan is suppose to kick in to pull air through and keep temps steady.

thats only if you have thermo fans on your car

belt driven fans are constantly working and engine temp SHOULD co up slightly if not moving due to less air movement through the core

[mitchy_]

actually the fans on RB's are clutched, they apparently stop moving at higher speeds.

but yes, they are constantly spinning at idle

[-Dukes-]

(feel free to correct me people)

Oil is a major factor in engine wear.

your engine would run dry for 2 seconds before the cold oil is pumped up to the valves and while the oil is cold its not flowing easily.

I've seen inventions for pre-heating oil sumps before starting, and i'm sure someone will have invented a oil primer.

[mitchy_]

do you think if you turn the car off for 4 minutes, the oil is going to go stone cold and all vanish into the sump?

[bubba]

actually the fans on RB's are clutched, they apparently stop moving at higher speeds.

but yes, they are constantly spinning at idle

They don't stop spinning at high rpm, the clutch is there so that the fan isn't spinning at full engine speed at high rpm.

As for oiling, there are products out there that retain oil pressure in a container so that the instant you flick the key, it squirts the pressurised oil through the system immediately prior to startup.

[-Dukes-]

do you think if you turn the car off for 4 minutes, the oil is going to go stone cold and all vanish into the sump?

I was talking about cold starting OBVIOUSLY!