Temp Gauge on cold VTEC not engaging

**aaronng** · 08-04-2006 11:42 AM

Originally Posted by roar

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** · 08-04-2006 11:46 AM

old engine- think 1985 vk commodore.

**ECU-MAN** · 08-04-2006 05:39 PM

Originally Posted by h22a accord

old engine- think 1985 vk commodore.

lol

but yeah thats an old engine

**z3lda** · 08-04-2006 06:01 PM

Originally Posted by Menzy

what the rest said

...

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

**h22a accord** · 08-04-2006 10:23 PM

Originally Posted by ECU-MAN

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.