01XC Coolant loss

[jmoser]

Every 600 miles of highway driving my coolant reservoir is near the 'Min' mark.
No obvious signs of a leak; could this be the pressure cap wearing out? 112K miles on it.
Has anyone else had to replace the cap or do they usually last forever?

[Jsandek]

The plastic ends are crimped onto the sides of radiator--look near the bottom of passenger side. I've been topping up my '04 every couple of months for over 1 year now. No visible leak on floor but the belly pan or something captures the fluid, then it evaporates due to the engine heat.

[BillAileo]

My son's V70 had a similar almost undetectable leak and it was at the radiator crimping.

[sjonnie]

Add dye, pressurize coolant system, search with UV light

[thegruffalo]

Unfortunately, our coolant loss was traced back to a water pump failure.

[jmoser]

Thanks -

Glycol is cheap enough I guess I'll live with it until the radiator needs to be replaced anyway.

[PierreC]

... mine was traced to a hairline crack in the coolant expansion bottle. It was replaced (together with a new cap) and the problem disappeared.

Pierre

[javaxc70]

Just to be sure, check that when you turn your heater on you don't smell a sweet glycol odor. I was loosing coolant when I first got my 01 and it turned out to be leaky O-Rings for the hoses going to the heater core. I would assume it is most likely a leaky radiator or coolant bottle, but it might be worth checking out.

[EurekaXC]

My Volvo XC 70 (2001) was giving a coolant warning about every 4 weeks.
Traced to the radiator seals failing, cured by replacing the radiator at about
$930AU. No sign of any leaks, ie coolant on the ground, in the engine bay.

TW