What is up with this Mazda!?
Discussion
Afternoon chaps,
So I have a Mazda 6 2.0 LF (Ford Duratec) engine, also used in the NC MX5.
It failed its MOT on emissions (they didn't bother testing as the garage was filled with smoke!). It smokes a white/ bluey colour with no detectable change in levels.
I ran a compression test and cylinders showed 125 across all four, no variation in any of them.
I have also run a leakdown test and pressure loss is in the 25% range, again with no variation between cylinders and no air leakage to be heard from intake, exhaust, radiator, expansion tank nor dip stick.
What else could cause such an issue? Recently I changed the PCV valve as it was gummed up with oil and I then gave it an italian tune up for around 40 minutes, power was excellent and levels seemed the same (although trying to get an acurate reading on these engines is a nightmare!)
I'm thinking the only thing to do is tear it down and look at the headgasket and oil control rings.
Would an exhaust leak of catalytic converter failure cause excessive smoke?
Bordering on binning the car but I'm kind of attached to the poor thing..
Many thanks
So I have a Mazda 6 2.0 LF (Ford Duratec) engine, also used in the NC MX5.
It failed its MOT on emissions (they didn't bother testing as the garage was filled with smoke!). It smokes a white/ bluey colour with no detectable change in levels.
I ran a compression test and cylinders showed 125 across all four, no variation in any of them.
I have also run a leakdown test and pressure loss is in the 25% range, again with no variation between cylinders and no air leakage to be heard from intake, exhaust, radiator, expansion tank nor dip stick.
What else could cause such an issue? Recently I changed the PCV valve as it was gummed up with oil and I then gave it an italian tune up for around 40 minutes, power was excellent and levels seemed the same (although trying to get an acurate reading on these engines is a nightmare!)
I'm thinking the only thing to do is tear it down and look at the headgasket and oil control rings.
Would an exhaust leak of catalytic converter failure cause excessive smoke?
Bordering on binning the car but I'm kind of attached to the poor thing..
Many thanks
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