Several Niggles with my VW Caddy Pickup Mk2 1.9D - Thermostat ****ing coolant

[Abaddon]

Had a slow leak from thermostat housing for a while.

 

Garage removed it, and resealed.. now its worst. Absolutely ****ing through the "bolt" when it got hot.

 

FAN did not kick in.. either..

 

 

[Breezy_Pete]

I expect the housing is cracked near that bolt. Part number 028121132B superseded that part number way back in 2001, which may improve your odds of searching out a replacement.

Plenty of aftermarket parts on ebay, so probably also obtainable by a decent motor factor. 028121132b | eBay

 

[Abaddon]

Awesome thank you!

 

Could the inner thermostat also be dodgy, or will a leak like this send the whole system wonky regardless?

[Breezy_Pete]

Check the expansion tank for returning flow as an indication that your water pump hasn't given up?

 

[Abaddon]

4 minutes ago, Wino said:

Check the expansion tank for returning flow as an indication that your water pump hasn't given up?

 

 

Sorry, dumbo here. How do I do that?

[Breezy_Pete]

Run the engine with the lid off the expansion tank, see if hose no. 13 here: coolant hoses and pipes; flange; reservoir - Caddy(CA) [EUROPA 1998 year] (7zap.com)

is trickling a little water back into the tank, more so when you rev the engine.

[Abaddon]

Awesome, will give it a go tomorrow when the suns back out

[D.FYLAKTOS]

On 23/11/2021 at 18:05, Abaddon said:

 

 

Could the inner thermostat also be dodgy, or will a leak like this send the whole system wonky regardless?

 

It's better to buy then as a ''set" which means the thermostat already is inside the housing with a new gasket.

[Abaddon]

I've had conflicting messages. Is the thermostat housed in this piece that is leaking? I've been told the thermo is elsehwhere? 

[D.FYLAKTOS]

14 hours ago, Abaddon said:

I've had conflicting messages. Is the thermostat housed in this piece that is leaking? I've been told the thermo is elsehwhere? 

 

You can buy a separate thermostat and keep the old plastic housing but i think it's better to buy the as set which means new plastic housing with thermostat installed inside

together with a new gasket you will be fine.

Look and example of mine (1.3 Felicia) , older thermostat damaged

 

 

so i bought a set as this example:

 

 

 

 

3 inox bolts and nuts and you are OK.

[Papez]

On 27/11/2021 at 21:28, Abaddon said:

I've had conflicting messages. Is the thermostat housed in this piece that is leaking? I've been told the thermo is elsehwhere? 

 

In 1.9, thermostat is in coolant pump housing.