My PCV valve hose shattered when I moved it to remove the intake manifold, so why not cut it open and see what's inside?

Interesting and simple design. Tip of spring points towards pipe to engine block.







Thanks,
Ted

 

pretty simple...that thing is still good, i don't see any tears. just cut off the hard hose and add rubber hose to a catch can.

 

Catch can is in, replacement PCV was part of the plan before I give you a call for tuning

 

What are the symptoms of having a bad PCV on the M156?
I’m assuming some oil use and possibly some smoke on start up?
Does it affect driving performance?

 

blue smoke out of exhaust, low oil light being triggered often, and if it's really bad, you'll trigger a lean idle code. another thing to mention is, as its trending towards being really bad, your idle fuel trims will be far from 0, but also if you have filters, row airboxes, or headers, your fuel trims will be way off already, so it would be difficult to advise you on those items.

 

I replaced mine around 70k on 2014 model. Mine was still good but compared to the brand new one but the tube on the old one definitely felt brittle compared to the brand new one.

 

My car blows a little smoke if I do not fully warm up car before shutting down and upon restart up. The previous owner had the PCV replaced, but I did notice the car had its secondary cat removed. Car doesn't smoke every time its not warmed up, maybe once a month or so. Do you think the cat removal may play a role?

 

shouldn't be puffing "blue" smoke if the PCV is correctly functioning. white smoke is coolant or condensation in the exhaust system. black smoke is running rich from fuel.

 

Thanks for the response, I will look into the PCV replacement.

 

if your PCV is still working correctly you may just simply need a catch can. the PCV does a great job with limiting oil vapor from pooling, but as the PCV gets worse oil pooling within the intake manifold will continue to get worse thus causing blue smoke.

 

I see.
Great information, I may look into a catch can as well.

 

If you plug that “whistle port” the whole pcv is rendered useless. It is the evacuate to atmosphere port.

 

Cylinder 7 before:




Cylinder 7 after:







RedLine poured in through spark plug mount, left to work for a few hours, then shop vac.

 

i'm sure this last post was meant for another thread...but a good perfect tune would clean the pistons a good amount as well. hopefully those divots are an illusion from the carbon specks and not pitting from detonation.

 

Wrong thread. My bad. Thanks! Mods please delete...

 

arent those divots the relief for the valves? i think this is relatively common in engines.

 

i meant the small black specks...hard to tell if they're pitting in the alloy or shadow from the carbon bits. to me it looks like massive detonation as the leading and trailing piston crown seems to have massive pitting.