Just about to change my heater O rings and going to buy a long screwdriver as recommended on various threads.

Can someone confirm which head the screw is that holds the pipes onto the heater matrix - PH or PZ2. The many & various threads on here and elsewhere refer to both, and if there's any problems loosening said screw I'd prefer to have the correct one.

TIA

Alastair

Mine was a Phillips and replaced it with a Allen bolt good luck getting it undo I ended up drilling the head off mine

Thanks Matt, decided to check before shopping, and it turns out I don't need one!

On removing the transmission side cover, some kind soul had been there before and done the necessary surgery, removed most of the inner side panel and cut & taped the duct in 2 places.

So I can get to the (phillips) screw with a standard longish driver. I may even be able to change the O rings without removing the binnacle, but if not, I've done that before, no trouble.

Too dark now but I'll finish it in the morning (or is that tempting providence?)

A

Even if it is a Phillips using the same size Pozidrive may give you a better chance if it's tight. Pozis have sharper blade edges.

Replace it with a Allen bolt when you get it undone and what nice little suprise having the hard work done for yourself already.

Well - got it done, took just over an hour, although 25 mins of that were spent trying to remove one of the under-bonnet heater hoses with those bloody ridiculous spring clips , so I could blow the coolant out,

Managed to move the clip but then couldn't get the hose off, seemingly welded on to the tube running through the firewall. Gave up and spent another 5mins trying to get the effing clip back on. Didn't have a suitable screw clip to replace it. Eventually just drained it into a plastic tub in the footwell.

Screw came out no bother, one O ring split half way through, the other was fine, both rings still quite flexible. Got it put back together using silicon grease on the rings and made sure pipes were properly seated.

I've left the various covers and the duct off just in case of further leakage (a 20 minute trip seems very encouraging), and because I want to free a sticky blend motor.

Also - I did it without having to remove the binnacle and instrument pod, but only because a previous owner had already carried out the surgery on the duct.

Fiddly, but definitely not the worst job I've had to do . . .

A