So after 7 odd years with just servicing and consumables i finally have an issue.. Normally i find i never really have a need to go that far in the rev range but on a bit of uphill dual carriageway that i pull out onto, i do need acceleration when the TITLE has started happening. Done a bit of googleing and have ordered the cheapest obd2 fault finder, it must be rubbish but time will tell..

@Whisperhead :

Found on eBay :

Quote from: Whisperhead on September 18, 2026, 12:38Yeah I was just thinking this Carolyn, the car is over a quarter century old now so I guess this was all coming down the track sooner or later - at some point soon I'm going to need to find myself a replacement hose set and sort the whole system in one hit.

Good luck with that! I think we're just going to have to find acceptable substitutes and re-route them somewhat.

Yeah I was just thinking this Carolyn, the car is over a quarter century old now so I guess this was all coming down the track sooner or later - at some point soon I'm going to need to find myself a replacement hose set and sort the whole system in one hit.

I'm fraid this sort of problem is going to occur more often.. These special little hoses are getting past their sell-by date.

Ive found that a "snake" cam is ideal for finding little leaks like this, you can get them fairly cheaply on Amazon and they plug into your phone. Allows you to see down in there. It's how I found my leak.

I'd try filling up the expansion tank with water and then somehow pressurising the system a bit (maybe a plunger or something over the expansion bottleneck hole if you dont have a pressure kit) to see where the water is pushed out. An open cardboard box laid flat under the car is also a half-decent way to find the drips, provided the undertrays are off.

It's unfortunately a case of no choice at the moment - it's my daily car. I'm carrying a bottle of coolant in the car to top it up after each journey, and the distance I have to travel each day isn't too far so with a little luck it'll be ok.

Ordinarily I'd contact J-Spec for a replacement but I'm hesitant to fit a used hose, it seems worth replacing with a new one. Given the cars age, the originals seem to be discontinued everywhere I've looked.

Edit: Looks to be 16mm (5/8") - I;m contacting some local motor factors today, so will update if it fits.

100% much like mine is as I put in another thread although I can't see yet which hose it is

I share that view.

I've only had the previous R version.

The R version seemed OK to me in the wet for the driving I do.
Not tried the replacement RS.