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[lesbrunt]

hi, my v6 2.5 keeps blowing rockerbox gaskets, the garage says the breather system is clear, any sugestions?

[Andy B]

hi, my v6 2.5 keeps blowing rockerbox gaskets, the garage says the breather system is clear, any sugestions?

Is your garage is using pattern gaskets? 

[Manual Elite V6]

Are they fitting genuine GM gaskets, I find that pattern parts don't last long at all even when fitted correctly.

[Andy B]

And welcome to the forum . 

[albitz]

Also need to check they are cleaning all the breather system and not just the box on top of the plenum.

[Webby the Bear]

Welcome. 'keeps blowing the gasket". How many times have they done it? New gasket, full breather clean and regular oil changes

[lesbrunt]

thanks for the comments, the work in question has been done at GM main dealer so I would hope they are using genuine parts, this job has been done five times now, spoken to them this morning, they have re-done them taken it for a test drive & it blew again! they said the engine is breathing heavy, but if the breather system is ok how can this be? 

[tunnie]

thanks for the comments, the work in question has been done at GM main dealer so I would hope they are using genuine parts, this job has been done five times now, spoken to them this morning, they have re-done them taken it for a test drive & it blew again! they said the engine is breathing heavy, but if the breather system is ok how can this be?

If its blown in that short period of time there must be a serious blockage or they are not being fitted right.

Have they removed and cleaned breather system?

[albitz]

Which dealer ? They seem utterly incompetent tbh.If they fit genuine gaskets,properly,and make sure the breather system is properly cleaned,theres no reason why the gaskets should continually leak.
I hope they arent billing you every time they get the job wrong ?

[Tony H]

thanks for the comments, the work in question has been done at GM main dealer so I would hope they are using genuine parts, this job has been done five times now, spoken to them this morning, they have re-done them taken it for a test drive & it blew again! they said the engine is breathing heavy, but if the breather system is ok how can this be?

What like some phone pest pervert,(boll0cks) If they are cleaning ALL the breather system properly there is no reason for gaskets to blow so soon I do hope if they have invoiced you for every repair you have told them to stick them where the sun doesn't shine 

[Webby the Bear]

honestly mate this sounds like utter 'dangle berries', as the other lads mentioned.

i'm going to tell you my first instinct..... and that's that they are not getting the half moons correctly in place. its the only thing they can get wrong as far as im aware that would ''blow'' on an initial test drive. imo

[amba]

If Half moons were not sealed you would have an oil slick not just a leak

I would be more suspicious about them tightening the fixing bolts down to wheel nut torque  and spreading the covers off the gaskets causing them to start leaking as soon as the camshafts start turning

[Webby the Bear]

straight away like that?

as said i'm just guessing 

[omega3000]

thanks for the comments, the work in question has been done at GM main dealer so I would hope they are using genuine parts, this job has been done five times now, spoken to them this morning, they have re-done them taken it for a test drive & it blew again! they said the engine is breathing heavy, but if the breather system is ok how can this be?

 

Engine breathing heavy because all its breather system is blocked 

[Abiton]

Engines breathe heavily if/when (bore/piston-ring) wear causes significantly more blow-by gases than normal.