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[MikeDundee]

Check coolant came on last nit on the MID, so about half hour ago checked the tank and it was empty, nipped down to the garage and bought some Comma coolant to top it up with, topped it up to the level, I have just been for a short run up to peckham, less than 2 mile round trip, now got steam coming from the engine bay, looks like something is leaked from underneath the engine but can't see where it is coming from.

Find it unusual that after getting it back after lamda's getting done yesterday I have no coolant left :-/

Could there be an air lock in the system???

Some pics:

[Taxi_Driver]

HBV?  :-/ I think they tend to fail in a spectatular manner!

I really need to look at mine again.......its been gradually getting worse again (after finding a few loose hose clips) Im loosing a ltr of coolant every couple of kmiles

[MikeDundee]

I'm gonna post some pics up in a minute, just had the engine running, it does'nt look good. Just wondering if those idiots round the corner done soething to it yesterday whilst doing the lamda's either that or just bad luck

[tunnie]

does sound like HBV!

[MikeDundee]

Posted up some pics, what's the HBV?, how big a job is that?

[Craig_R]

Mike you know the HBV is the Heater Bypass Valve

I think its scuttle off on a V6 to get easy access

some V6 person will be along to tell you where it is

[MikeDundee]

Mike you know the HBV is the Heater Bypass Valve

I think its scuttle off on a V6 to get easy access

some V6 person will be along to tell you where it is

 , scuttle?, I assume at the back of the engine adjacent window wipers?

[Big_Mart]

HBV is on the bulk head behind the cylinder heads right above were your leak is coming from if your loosing that much coolant should be obvious anough if its leaking and unless you have arms like match sticks you`ll need to take the scuttle panel off and have a decent pair of pliers its abit fidderly but straight forward anough.

[Big_Mart]

Mike you know the HBV is the Heater Bypass Valve

I think its scuttle off on a V6 to get easy access

some V6 person will be along to tell you where it is

 , scuttle?, I assume at the back of the engine adjacent window wipers?

yes mate black plastic thing were the wipers are

[MikeDundee]

Mike you know the HBV is the Heater Bypass Valve

I think its scuttle off on a V6 to get easy access

some V6 person will be along to tell you where it is

 , scuttle?, I assume at the back of the engine adjacent window wipers?

yes mate black plastic thing were the wipers are

So exactly what do I need to do once i get too it?, tighten it up, replace a clip?

[ELITE-3.0-V6]

The valve it's self has prob packed up mate, just remove the scuttle pannel and have a look and see if it's leaking.. might be the valve or might be a hose..
Take a look when the panels are removed...

[Big_Mart]

replace the valve mate its around £30??? from a dealer it cracks/splits and pisses coolant everywere have you confrimed its the valve yet???

[MikeDundee]

replace the valve mate its around £30??? from a dealer it cracks/splits and pisses coolant everywere have you confrimed its the valve yet???

I am going to go and have a look!!!

[ELITE-3.0-V6]

There a how to on here some where mate guide you through it step by step...

When u can see the valve top up the coolant then run the engine and see where the water is comming from..

[file28]

i too have coolant leak on 2.0 16v 1996 loses about 1-2 lts of coolant after 5-10 miles or so with bonnet closed steam seems to be coming from the drivers side front where expansion bottle sits,when releasing the cap seems to be a lot of pressure no sludge or mayo on engine filler cap or dipstick  :-?