Leaking coolant through expansion tank cap-Caterham with Vauxhall C16nz2 engine

23 posts / 0 new
Last post
MartinL2
MartinL2's picture
Offline
Last seen: 3 weeks 2 days ago
Joined: 05/05/2019
Leaking coolant through expansion tank cap-Caterham with Vauxhall C16nz2 engine

Please can anyone advise why coolant keeps on blowing out of the expansion tank filler cap. Could the cap be faulty and would anyone know the part number for this cap and the best place to source one from? Thank you Martin 

Jonathan Kay
Jonathan Kay's picture
Online
Last seen: 1 min 39 sec ago
Joined: 17/04/2014

It could be. Does it look as if should have an O ring and does it have one?

I'd start with Redline.

Jonathan

MartinL2
MartinL2's picture
Offline
Last seen: 3 weeks 2 days ago
Joined: 05/05/2019

Hi Jonathan, thankyou for your response, I don't think it has an o ring, are these caps set to vent at a specific pressure  and if so can they start to stick causing the coolant system to over pressurise, causing water to flash to steam and leak out through the cap..Martin

Martin
Wrightpayne
Wrightpayne's picture
Offline
Last seen: 2 hours 50 min ago
Joined: 17/04/2014

Could you post a picture of the expansion vessel? Caterham have fitted a few types over the years, some of competing manufacturers to the engine installed.

Jonathan Kay
Jonathan Kay's picture
Online
Last seen: 1 min 39 sec ago
Joined: 17/04/2014

Good idea.

I've just had a look at some Vauxhall Assembly Guides and couldn't find any answers.

Jonathan

PS: Please let me know if you'd like a copy.

MartinL2
MartinL2's picture
Offline
Last seen: 3 weeks 2 days ago
Joined: 05/05/2019

Hi Jonathan, if you could send me some info, that would be very much appreciated...Martin 

Martin
Wrightpayne
Wrightpayne's picture
Offline
Last seen: 2 hours 50 min ago
Joined: 17/04/2014

Thats a rover expansion tank. Coolant looks a bit rusty! 

Jonathan Kay
Jonathan Kay's picture
Online
Last seen: 1 min 39 sec ago
Joined: 17/04/2014

"Thats a rover expansion tank. "

EAP8713?

Jonathan

MartinL2
MartinL2's picture
Offline
Last seen: 3 weeks 2 days ago
Joined: 05/05/2019

Is there only one cap type to suit this expansion tank, or are there different caps set at different vent pressures according to actual engine type. To be honest I drained the coolant system, flushed it through, refilled with almost neat red anti freeze and then it seemed to blow out of the expansion tank. Bit by bit with keep refilling, the coolant is probably just water now, and maybe the reason for the rusty coloured coolant..Martin 

Martin
Wrightpayne
Wrightpayne's picture
Offline
Last seen: 2 hours 50 min ago
Joined: 17/04/2014

That looks like the tank Jonathan - rather expensive and shows the 'stilts' removed for the caterham install.

Wrightpayne
Wrightpayne's picture
Offline
Last seen: 2 hours 50 min ago
Joined: 17/04/2014

So, was it OK before the new coolant was put in?

Some seven engine types are notorious for air locks and blowing out their coolant, requiring a certain fill procedure. Not sure whether the VX is afflicted - I know from experience the rover k series air locks and will force coolant out of a sound cap.

Can any VX aficionados comment?