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[BlueBridge]

I'm about to try Radweld plus to see if that can cure a long term water leak, and going to flush the system out, am I best to add the Radweld before or after the flush.

Cheers, Jon 

[albitz]

Best to sling it in the bin tbh.Find where the coolant is coming from and replace whats leaking.

[Elite Pete]

Radweld won't cure a leak but will stop it for a while, i'd be more worried about long term effects of having rad weld in your cooling system

[The Red Baron]

Radweld won't cure a leak but will stop it for a while, i'd be more worried about long term effects of having rad weld in your cooling system

i will second that pete. 

[tunnie]

I've seen the affects of rad weld 

Budget for a new radiator 

Find the leak first, what engine? HBV been checked?

[BlueBridge]

Thanks all
Its had a new water pump and HBV, there are no visable signs of where it is coming from. I don't want to be throwing any more serious money at it tbh. It's a 2.5 on a 98 plate.

Pete i've sent you a PM

Cheers Jon

[omega3000]

Ive also seen the affects of rad weld in a 2.5 mig , made it worse than ever so i would say dont do it . There must be a leak somewhere , place a piece of cardboard underneath the car over night and see where any water drops ..that might give you a clue as to where its coming from 

[Kevin Wood]

Don't throw any more money at it until you have found the cause of the leak. 

The money you've spent already could presumably have been eliminated  if the source of the leak had been accurately identified before replacing parts.

I would strip it down so you can see the thermostat housing, oil cooler cover, etc, then pressurise the cooling system and see if anything can be spotted.

I recently had to replace the seal on a new pattern water pump because it failed (read: turned to plastic) within 2 weeks of fitting so new parts doesn't eliminate them as problems. Unambiguously finding the leak does.

Don't touch Radweld unless you want to be replacing the radiator, heater matrix, etc. at a later date.

[BlueBridge]

Just returned the Radweld to Halfords and bought my lunch with the refund

[tunnie]

Just returned the Radweld to Halfords and bought my lunch with the refund

Best thing you could do 

[amba]

Bet you enjoyed your lunch more than the grief the radwell would have given you long term

Total "Snake oil " IMHO