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[raywilb]

a young lady has just rang me , apparently she has put some coolant into the header tank . not too much about 100mls. she realised & hasn't started the car. me not sure if such a small amount will harm I have advise her to drain the header tank . would it do harm?

[Nick W]

I wouldn't worry about it.

[Doctor Gollum]

The waterpump will potentially cause it to foam...

Also, draining the header tank is a moot point as it will be already be blended with the coolant.

To be sure, flush and replace the coolant... it is a service item afterall... also might not be chemically compatible with an engine that is probably aluminium.

[STEMO]

So, Ray.....Nick or Al? Well, punk, do you feel lucky?

[zirk]

I know someone who puts cheap Supermarket CokaCola in the System about a week before doing a Flush. 

[STEMO]

I know someone who puts cheap Supermarket CokaCola in the System about a week before doing a Flush. 

Coolant is liquid, liquid goes in the header tank, good enough for me.

[STEMO]

Then again, oil is quite liquidy. Don't put that in. Oh, no.

[raywilb]

The waterpump will potentially cause it to foam...

Also, draining the header tank is a moot point as it will be already be blended with the coolant.

To be sure, flush and replace the coolant... it is a service item afterall... also might not be chemically compatible with an engine that is probably aluminium.

  its a rover200 so I am guessing removing a hose from the thermostat housing as the engine hasn't turned over she should get away with it as none will be in the block . I do know said motor has recently had a new head gasket thermostat + housing, water pump & timing belt done by rover trained mechanic.

[Andy B]

a young lady has just rang me , apparently she has put some coolant into the header tank . not too much about 100mls. she realised & hasn't started the car. me not sure if such a small amount will harm I have advise her to drain the header tank . would it do harm?

What's she put in where?

The title says screen wash & the thread says coolant. She should be more concerned with why the header tank is low .... she's loosing coolant .... where from?  🤔

[Field Marshal Dr. Opti]

I know someone who puts cheap Supermarket CokaCola in the System about a week before doing a Flush. 

Coolant is liquid, liquid goes in the header tank, good enough for me.

No need for Fuse 19 to offer an opinion when a professional like you is on hand.

The forum is blessed by your presence.

[STEMO]

I know someone who puts cheap Supermarket CokaCola in the System about a week before doing a Flush. 

Coolant is liquid, liquid goes in the header tank, good enough for me.

No need for Fuse 19 to offer an opinion when a professional like you is on hand.

The forum is blessed by your presence.

Thank you, Opti. Always happy to help. 

If you want your jag servicing, drop it off here and I'll bring it back when it's done. FOC of course.

[Field Marshal Dr. Opti]

I know someone who puts cheap Supermarket CokaCola in the System about a week before doing a Flush. 

Coolant is liquid, liquid goes in the header tank, good enough for me.

No need for Fuse 19 to offer an opinion when a professional like you is on hand.

The forum is blessed by your presence.

Thank you, Opti. Always happy to help. 

If you want your jag servicing, drop it off here and I'll bring it back when it's done. FOC of course.

I I doubt you'd be any more inept than the average Jaguar mechanic.......sorry technician. 

[STEMO]

I know someone who puts cheap Supermarket CokaCola in the System about a week before doing a Flush. 

Coolant is liquid, liquid goes in the header tank, good enough for me.

No need for Fuse 19 to offer an opinion when a professional like you is on hand.

The forum is blessed by your presence.

Thank you, Opti. Always happy to help. 

If you want your jag servicing, drop it off here and I'll bring it back when it's done. FOC of course.

I I doubt you'd be any more inept than the average Jaguar mechanic.......sorry technician. 

Inept?  You can eff orf, it'll be a thousand pounds now.

[Sir Tigger KC]

Maybe it'll clean the coolant system!   

[Kevin Wood]

Well, the alcohol component in the screenwash will boil off leaving water and a few surfactants. Can't see it doing any harm once it's been diluted with the rest of the coolant, TBH.

its a rover200...

Leave it until the next routine head gasket change.