Coolant Smell

[AlabamaDan]

I have a small coolant leak somewhere on my 98 QX4. I'm not running hot or anything, but I can smell it when I get out after a 20-30 minute drive. Any suggestions on where to start looking?

[EdBwoy]

The radiator, if it is the standard Calsonic plastic+aluminum unit. If you see crusted blue/green stuff along the mating surfaces and you don't see a crack, then the crimps might be giving out.

That or the radiator cap. You could do the pressurizer check or just check visually if the safety label is blown off and the underhood is whitish over the cap, quite a giveaway.

Best to check after a long drive, with the vehicle hot and still running.

[AlabamaDan]

Thanks.

[AlabamaDan]

I slipped out and checked on the QX a little. It was too hot, 90+, to stay outside long but I did a little investigating. I've probably driven it 50 miles since I last checked coolant and it was maybe a pint low. The cap looks good. I couldn't see any signs of a leak and it isn't dripping. How can I find it?

[macgiver]

mac, you may just need to wait for "drippage" to hit the old asphalt. Light cement I've found reveals leaks bestest. Lastly be sure , especially if your runn'in high concentration of coolant ratio (like me =70% !). A very hot engine compartment, with all the baffles coupled with the VENTING on overflow tanks be sure it isn't just the FUMES of coolant , in & around the enclosed engine - STUFF REALLY STINKS _ RIGHT !
Speaking of baffles possibly trapping smells , all the PLASTIC COVERING the top /sides of your motor & under-car probably obstructing your view or drips themselves , right , if your bent on "seeing for believing" that a leak exists somewhere's.Temporary removal ought to help . IF you got them ?
p.s. Go into auto parts store , walk by the aisle with Antifreeze/Coolants - if you detect that same smell - you have a bloodhound's nose , and your car maybe OK ??