Coolant Question

[Bugzs15]

Is it normal to smell a bit of coolant from the radiator cap,

I think it is almost new as it was replaced on my last service by my mechanic 5,000 km ago.

Does the radiator cap vent a small amount of pressure to the atmosphere or should i have no smell whatsoever and my cap is not sealing properly.

Also when i check inside my overflow bottle after the car has warmed up i see some residual bubbles around the edges of the overflow bottle, not bubbling, just some bubbles floating on top in small clusters.

Is this just a normal reaction to the coolant expanding and being sloshed around or do i have air entering my system and being pushed out.

I just want to make sure i don't have an issue. the colour of the coolant is bright green and car is not overheating.

if anyone has looked inside their overflow and saw small bubbles floating around the top could you reply,

Would be good to check.

Car is an R34 GTT

Thanks

Edited May 26, 2014 by Bugzs15

[jjman]

get your car up to full operating temp such as after a 20min + drive. leave the car idling, get out and go and listen to the radiator n motor. if you hear bubbling noises- not good. if bubbles are coming out into the overflow bottle, also not the best.

But likely that the mechanic just didn't bleed the system well if you say it has been done recently. if so then search SAU how to properly bleed that air from an RB25.

yes, its likely you will smell radiator fluid as they would have spilled some doing the fluid change.

[Bugzs15]

Did that, and no bubbles in overflow, so hopefully just some air getting into the system and being pushed out when car is warming up.

I have been losing around 100ml of fluid every 5000km but cant find the leak anywhere so will just keep an eye on it.

[jjman]

sure you don't have a very slight head gasket leak? bubbles in the system and a slow loss off coolant...?