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[Radar]

SWMBO said coolant warning came on last week but only told me now as there was a lot of liquid on the driveway. Looked like coming from back of engine / hbv area.

Header tank was empty so I topped with water - no sign of anything untoward (i.e. oil) in the header tank, ran the car for 15 mins. and all ok - switched off and no leak. Restarted and let idle again and some drops of coolant were landing on lamda sensor area but could not track the source. Oil cooler plate looked ok from what I could see, hbv was not wet (no wetness in driver/passenger wells), all pipes where coolant flows were dry as was radiator.

I have obviously missed something but can anyone give any pointers? Was banking on using the car next week for a few trips


Thanks

Just took another look and its been about 45 mins since I topped up and approx. 1/4 - 1/2 litre dropped on driveway falling down onto lamda sensor area but still cant trace it further

[TheBoy]

HBV is most likely. Try checking with the climate set to HI and then LO.

Remember, top up with 50:50 mix antifreeze, not water, as antifreeze has corrosion inhibitors.

[Radar]

Thanks - will do now

[Radar]

Climate Hi - Coolant p****ing out from back of engine area landing around where the dustcap for the gearbox is
Climate Lo - Leak stops / very little
A/C off - Stops / very little

If this points to HBV - is it dealer only recommended?

Thanks

[YZ250]

Climate Hi - Coolant p****ing out from back of engine area landing around where the dustcap for the gearbox is
Climate Lo - Leak stops / very little
A/C off - Stops / very little

If this points to HBV - is it dealer only recommended?

Thanks

It does. 

Can't comment on pattern part as I've only ever bought genuine.

[Shackeng]

This may help: http://oldsite.omegaowners.com/forum/YaBB.pl?num=1193594464/0 

[omegod]

Def HBV, I have not had a problems with pattern hbv's but it's not a job you want to do twice, VX trade is about £40 for the part vs £15 pattern

[chrisgixer]

Sounds like hbv to me. Dealer only IMO. Several posts here of pattern failing although not as common a failure as pattern sensors etc.

Could some of the lambda area water be from ac drains? They are either side of gear box. Just rearward of those two gear box bolts.

Keep a track of the last load of water that went in. Then next time use the same amount of coolant concentrate to keep it roughly mixed tight.


(Do I remember looking in the v of your engine for coolant leaks, at the Wycombe meet? Looked like mild oil cooler plate leak, did that get fixed? I guess it must have been or it would have failed big time before now? I seem to remember pressure testing it with The Groomer )

[TheBoy]

Indeed, HBV. I'd go dealer only personally.

[TheBoy]

(I seem to remember pressure testing it with The Groomer )

You were t...   ...no, lets just no go there. Ever.

[chrisgixer]

(I seem to remember pressure testing it with The Groomer )

You were t...   ...no, lets just no go there. Ever.

No the engine you nutter.

[Radar]

Yes at the Wycombe meet you gave it big breaths - to find the oil cooler plate needed resealing - this got done pronto by Loo Knee (+ thermostat). The small bit I could see showed no signs of leak there.

Have made a mental note of how much water has gone in . The amount of liquid that came out was more than water from the a/c.

First thing in the morning i'm calling the stealers to get hbv. I need the car to go to London on Friday to see Usain Bolt (+others run) amongst other things.

For those who have done this - is it scuttle off only, plenum off only or both and do I really need to drain the coolant -  it was changed about 6 weeks ago.

Classic quote from SWMBO (who drives this mostly) - the coolant warning message came on last week but I thought it was normal

Thanks Guys

[chrisgixer]

See if you can locate the leak first. It might be a hose. Also remember hot water pipes rarely show a leak easily as they are hot and the water evaporates off surprisingly quickly. Look for coolant coloured residue etc

I tend to remove scuttle, plus yours needs re sealing, so now is a good time to get some gutter seal or similar laid around the metal scuttle drain to plastic scuttle join, along that edge with draft excluder, and maybe seal around the wiper spindle hole rubber/foam washers. Should be good for a while then.

[Radar]

Thanks - I will try to get the hbv on sale or return (if maidenhead don't have one, slough normally do).

When I did the dispack I resealed the scuttle as you describe (plus some "magic tape") so will take off and reseal again. The plan is to take scuttle off, inspect pipes / hbv, run engine with a/c and inspect again - hopefully this should give the pointers. Then if need be remove plenum for further inspection/access if need be..... and I was planning to sort my garden decking out this weekend, but this takes priority.

[Shackeng]

Yes at the Wycombe meet you gave it big breaths - to find the oil cooler plate needed resealing - this got done pronto by Loo Knee (+ thermostat). The small bit I could see showed no signs of leak there.

Have made a mental note of how much water has gone in . The amount of liquid that came out was more than water from the a/c.

First thing in the morning i'm calling the stealers to get hbv. I need the car to go to London on Friday to see Usain Bolt (+others run) amongst other things.

For those who have done this - is it scuttle off only, plenum off only or both and do I really need to drain the coolant -  it was changed about 6 weeks ago.

Classic quote from SWMBO (who drives this mostly) - the coolant warning message came on last week but I thought it was normal

Thanks Guys

According to the how to I posted above. Yes.