Hi I've got a coolant leak that only seems to occur when the engine is very hot (left idling for quite a while at the MOT this morning). I'm wondering/hoping someone can identify the part for me where I think the leak is coming from. It looks to be in a really difficult to access location, but then most things are! Any guidance really appreciated. On the pic, the top pipe with the clip (light blue arrow) seems to attach to a unit (dark blue arrow) which has a solid connector (presumably attached to the unit) within the yellow circle. Can anyone shed any light please? Sorry about poor pic quality - underneath it, very hot and hot coolant... Just to help with location/orientation, this is nearside rear, just in front of the rear axle looking directly upwards (effectively towards the coolant reservoir, but further back). Thanks Chris
Discussion summary
YOUR RESEARCHCoolant leak identification
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 8 captured posts examined · 0 partial discussions
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
- 911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T020439Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
The pic quality is so poor, it's invisible. Maybe if you cant post it here, post it elsewhere and link to it?
Sorry, couldn't attach it - flippin' thing. Now with a link (hopefully!!) to the pic...
At the bottom of a reply... Filename - "Choose File". Browse for it. "Open" Then "Add attachment" then "submit". EDIT - Ah, I see you've added a link to the first post now.
finally.... sorry, technical muppetry.
Is that not the OSV up there? It's the right location and made of plastic.
Yep - that's what it looks like. OSV?
Thanks for your assistance identifying - so assume this is the oil separator (valve?). This has a coolant connection then (seemingly at the top)? Thanks Chris
This is a source reference. Confirm exact model applicability in the original material.