Temp Gauge on cold VTEC not engaging

[TYPE-R617]

when my temparature gauge is still on cold my vtec doesnt seem to come on, i have to wait till the gauge is near the middle before i notice the vtec kicking in. is this normal? does anyone else have this problem? opinions please.

[ef8]

VTEC wont engage untill oil and water temp are at a certain temp. About
60 degress.

[weeman]

you shouldn't be revving your engine out that much until its warmed up anyway, you could seriously damage you engine doing that

[STTICH]

VTEC wont engage untill oil and water temp are at a certain temp.


as said. vtec won engage when engine's cold. wait till it warms up..don push it while its cold.. no no ~

[Menzy]

what the rest said :p ...

[TYPE-R617]

oh sweet thanks guys

[tinkerbell]

even when coolant temp is 'hot', the engine oil will not be upto proper temperature and you risk damage to the engine...

this also applies to the gearbox oil temperature... it would take an engine about 15-20 mins to get "up to temperature"

[roar]

yer...the temp guage applies to coolant temp not oil temp...that guage doesn't tell you too much...what i do is don't bring it about 3500 revs until the temp guage shows a middle range...then for next 5-10 min don't vtec it...after that should be sweet

[aaronng]

I've heard that coolant temperature gets hot twice as quickly as oil temperature. So if it takes 10 minutes to warm up, wait another 10 before you give it some full throttle redlining.

But if you are driving normally, then all you have to do is warm up for 1-2 minutes and then drive off.

[tinkerbell]

aaronng - i personally believe you can skip the 1-2 minute warm up, and start driving within < 30 seconds of starting the engine...

[roar]

agreed with tink...with old engines that warm up period is essential...but newer engines are made to operate instantaneously

[h22a accord]

some honda engines even have a rev limiter set lower than normal when the engine is cold to stop you from revving it too high.

[aaronng]

agreed with tink...with old engines that warm up period is essential...but newer engines are made to operate instantaneously
Doesn't the "old engine" category include the D and B series, while the new ones are the K series?

In the K, if you let it idle to warm up, it takes extremely long before the needle gets halfway. If you drive around, the needle reaches the middle mark in about 2-3 minutes.

[h22a accord]

old engine- think 1985 vk commodore.

[ECU-MAN]

old engine- think 1985 vk commodore.

lol

but yeah thats an old engine :)

[z3lda]

what the rest said :p ...

the point of you posting that was......... ... ?

[h22a accord]

lol

but yeah thats an old engine :)


for sure, the VK commy used the last incarnation of the venerable 202 engine that first appeard in the HQ holden back in 1971 . NOW thats old lol.

reason why u have to warm these old engines up by idleing for a few minutes? ? - the clearances and tolerances of the bearings and most other oil lubricated parts in these engines were much looser than later model engines so these old engines required an engine oil with a higher viscosity, so when the engine is cold the oil is very thick and isnt easily circulated throughout the engine until the oil warmed up ,so by driving the car hard while cold would cause premature wear on everything from valve guides, pistom rings, cam lobes etc etc.


these days late model jap engines for eg- b16a have much tighter tolerances which require a much lower viscosity ( thinnner ) oil for it pass through thes tight spaces between crank bearings etc etc etc and if anyone has ever tipped a bottle of Honda FEO in there engine will realise that it's very runny even at room temp so it will pass through the engine and lubricate even when the engine and it's oil are cold.

hence why you only have the start the car and drive off nice and easy as it only takes a few seconds for the oil pump to pump enough oil to sufficiently lubricate the engine.

Once the oil is warmed up the oil can pass through the engine faster while the revs climb and do its job of lubricating.

[ErazeR]

Ofcourse its normal, vtech likes HOT, not hot air but hot oil.
the hoter the oil the more power you feel.

[tinkerbell]

Ofcourse its normal, vtech likes HOT, not hot air but hot oil.
the hoter the oil the more power you feel.

ahhhhh, school holidays again :rolleyes:

[ECU-MAN]

lol yeah