Skip to main content ↑ ↓
Recent Posts
23
Engine & Gearbox / Re: High rpm when cold for 20 minutes,...?
Last post by philip -
yes sorry i did test the coolant hoses and they are getting hot. I was just about to ask if it was worth it to take it out and do the boiling water test in the hope of a miracle or improvement,...lol. I will do this over the weekend as at the moment weather here south east not the best,...If i remember well, I only have to take the air filter housing off to get easy access ? thanks again, fingers crossed as this problem just suddently started 6 months ago.
24
Engine & Gearbox / Re: High rpm when cold for 20 minutes,...?
Last post by Keekster64 -
Quote from: philip on
Another test done, turn on the car, idles at 1000 rpm, drive 1 minute, shoots up to 1400 rpm, drive only 10 minutes, come home, still at 1400 rpm. Turn it off, start right away, back at 1400 rpm. Turned it off, waited 45 minutes, start again, idles perfect ! It must be the waxstat ! I'm looking to buy one again but they seem to be impossible to find now. I only found this website but it's out of stock and frankly expensive anyways as i did change it over 10 years ago and i wouldn't have spent that much i'm sure,....Any ideas where i could fetch one ? Thanks.
https://www.classic-vw.co.uk/pierburg-2e2--2e3-carb-wax-stat-026129243c-7716-p.asp

I'm assuming you touched the coolant hoses to the waxstat to check they are getting hot, as you dont mention it?  That aside, I would removed the waxstat, complete with its hoses (when its cold) and submerge it in a cup of boiling hot water.  You should see the metal pin in the centre push out.  This is supposed to reset it, ie, without spring pressure restraining it.  If it leaks wax or coolant from around the pin, its knackered.  If not, then refit it and see if it improves.
25
Engine & Gearbox / Re: High rpm when cold for 20 minutes,...?
Last post by philip -
Another test done, turn on the car, idles at 1000 rpm, drive 1 minute, shoots up to 1400 rpm, drive only 10 minutes, come home, still at 1400 rpm. Turn it off, start right away, back at 1400 rpm. Turned it off, waited 45 minutes, start again, idles perfect ! It must be the waxstat ! I'm looking to buy one again but they seem to be impossible to find now. I only found this website but it's out of stock and frankly expensive anyways as i did change it over 10 years ago and i wouldn't have spent that much i'm sure,....Any ideas where i could fetch one ? Thanks.
https://www.classic-vw.co.uk/pierburg-2e2--2e3-carb-wax-stat-026129243c-7716-p.asp
26
Engine & Gearbox / Re: High rpm when cold for 20 minutes,...?
Last post by philip -
Thank you all for your help, while i study the video,...I will try to upload a video of the hole process so you can see how it goes as there is something about the 3 point unit that seems wrong,..will try to show,...I'll update as soon as possible.

Thanks again,

Phil.
27
Engine & Gearbox / Re: High rpm when cold for 20 minutes,...?
Last post by Keekster64 -
Whilst I remember, there is a rubber seal between the intake manifold and the cylinder head.  When they get old they swell, and this can restrict the flow of coolant to the waxstat.  Eventually they can break up and get stuck in the intake manifold and block it.  To check make sure the hoses to the waxstat are increasing in temp at the same rate as the top radiator hose.  If not you may have to remove the intake manifold.  I did it recently and its deceptively tricky.  You need the right tools to do it.