Overheating Mazda Van

[Mxmanus]

I have A E2000 Mazda Van that keeps overheating. I have checked head gasket and that is ok. The radiator cowling/shroud was missing so I installed a new one. I have flushed out entire system, used various rad cleaners/flushers. and water runs clear when draining. I have removed the Therostat at the moment to help cooling. I can see good flow of the coolant through the rad cap so the water pump seems ok. After all that it still overheats. I can only think that the Rad is blocked and I need to replace. HELP. anyone have any ideas of a solution would be brill. cheers

[KebabMeister]

In what way is it overheating?  Is it literally chucking water out the expansion tank or is the gauge simply reading high?

[Mxmanus]

It was running fine around town ie small journeys, with little strain on engine. Once on major roads higher speeds then temp gauge gets hotter, but not quite boiling. Today I installed new Rad cowling and it overheats very quickly anywhere (so worse than before) so now I know why previous owner removed cowling. A cheap fix to the problem I think. ok for small journeys but no good for long/harder ones. A new Rad keeps coming to mind?

[v64paul]

if you have a radiator repair specialist nearby, they will be able to flush the rad with chemicals far more effectively than you could do with a hosepipe. if it clears the blockage, great if not they will probably repair it cheaper than a straight swap.

[Tim Baxter]

It's possible that the matrix is thoroughly clogged up externally and removing the cowling might allow more air through.

[fly258]

A common problem with these engines is the alloy head cracking. I had the diesel version E2200, and this happened to mine after the "rev the guts out of it" check on the MOT. If its losing water then I would get it checked.