Dis­ap­pear­ing coolant

Car Mechanics (UK) - - Tales From The Workshop -

The first thing many own­ers sus­pect when they dis­cover that the coolant level is drop­ping, is that the head gas­ket has failed. The truth is that there are many places coolant can leak from the sys­tem.

The owner of this 2005 Peu­geot 307 was con­vinced that coolant was es­cap­ing via the wa­ter pump. Af­ter pres­suris­ing the sys­tem and leav­ing it to rest, we could safely con­firm that the prob­lem was the ra­di­a­tor. Age had taken its toll and the lower sec­tion of coolant fins, at the point where they en­ter the bot­tom tank of the ra­di­a­tor, had be­gun to per­ish. With a slight pres­sure ap­plied, the coolant could be seen ooz­ing slowly out.

In nor­mal oper­a­tion, this coolant would have been evap­o­rated by the heat in the sys­tem, leav­ing lit­tle trace of its exit point. With a cold en­gine and the coolant un­der low pres­sure, the ev­i­dence was eas­ily spot­ted.

Fit­ting a new ra­di­a­tor and refilling with fresh coolant put this 307 back into ser­vice.

Once the ra­di­a­tor was re­moved, the con­di­tion of the lower coolant fins and tank could be seen.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.