Dr Diesel con­sid­ers coolant

Each week we ask ex­perts in the work­shop to share their ex­per­tise

Big Rigs - - DIESEL DOCTOR -


Hello Diesel Doc­tor, I wanted to get your thoughts on coolants.

I have never been too picky, given my ve­hi­cles in the past have been owned by work.

Now I have gone out on my own as an owner-driver I wanted to get it right.

First I want to know if there is a par­tic­u­lar brand of coolant I should be us­ing and does it dif­fer be­tween the Euro and Asian mod­els?


Coolants are not all the same and are made up of dif­fer­ent ad­di­tives and base prod­ucts.

I al­ways rec­om­mend check­ing with the man­u­fac­turer for rec­om­mended coolant re­quire­ments for your ve­hi­cle.

It comes down to the de­sign and ma­te­ri­als that make up the cool­ing sys­tem.

Then you can look at af­ter­mar­ket op­tions with equiv­a­lent spec­i­fi­ca­tion to pos­si­bly save on cost.

There is no rule of thumb that one coolant is for all Euro­pean and one for Asian-ori­gin ve­hi­cles, as not all man­u­fac­tur­ers use the same ma­te­ri­als in their cool­ing sys­tems.

The ex­am­ple be­ing more and more en­gine man­u­fac­tur­ers, es­pe­cially Euro­pean ones, are us­ing al­loys in cylin­der heads, wa­ter pumps, ther­mo­stat hous­ings etc. So in this case a coolant with an al­loy cor­ro­sion in­hibitor is a must.

It comes down to the de­sign and ma­te­ri­als that make up the cool­ing sys­tem, that’s what de­ter­mines the type of coolant.

Re­mem­ber, the man­u­fac­tur­ers spent lots of money on re­search and devel­op­ment when de­sign­ing a coolant best suited for their prod­uct, so use this to your ad­van­tage.

Also, never mix dif­fer­ent types of coolant. Cheers, the Diesel Doc­tor. ■ Want ad­vice? Email: ed­i­to­rial@bi­grigs.com.au .


CON­SIDER THE FAC­TORS: When de­ter­min­ing your coolant, the de­sign and ma­te­ri­als need to be con­sid­ered.

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