Mo420
Member
- Joined
- Apr 17, 2014
- Messages
- 31
- Location
- Brunei
- Car
- '95 W202 C180, '97 W208 CLK320, '06 W639 Viano, '13 GT86, '07 RX300, '09 W211 E230, '15 Jaguar XF
Hello all,
Ok so here's the story, my dad owns a 1997 w208 CLK320 sport coupe with the M112 V6 3.2L engine, mileage is currently around 125k kms. I have only started driving the car daily quite recently as I just sold my previous daily driver and currently waiting for a good deal for a new car.
Anyway, the problem with the CLK is that it has started to consume oil. Initially it wasn't too bad, just needs a top up every now and again between oil changes, and we managed to isolate the problem to leaked valve cover gaskets. This went on for quite a while (thought it wasn't an urgent repair) before we got the gaskets finally replaced last few months.
So now, here's the real issue. So far, after replacing the gasket, the oil consumption problem hasn't gone away, in fact it has only been getting worse. Much much worse, as currently it's consuming around 1L of Mobil1 5w-50 fully synthetic every 500kms!
So far I haven't seen any oil droplets (used to have these before the gasket replacement) on the garage floor nor on the metal tray under the engine, its all been fairly dry so I'm fairly sure it isn't caused by yet another oil leak somewhere.
Car drives fine, pulls great and kickdowns well etc etc. Only symptom is on most of the cold starts in the mornings (used to happen only once in a while now happens in 95% of cold starts) - I get a bluish smoke coming out of the exhaust, happens for about a minute or two, i.e. happens during fast idle only and stops when the revs start settling down to normal idle. After that, no bluish smoke whilst driving (no signs of smoke in my rearview). Another thing is, in one of the cylinders, cylinder 4 I think (front most, passenger side on my RHD vehicle), keeps getting very bad carbon buildup on the spark plugs. My last set of plugs lasted for only about 10,000kms I think
.
So far, the symptoms are pointing out to possibly an oil burning issue in cylinder 4 (maybe could also involve other cylinders). I'm not very well versed on these engines so please do feel free to share any thoughts/experiences/info/comments on a possible fix for this, massive thanks in advance!!
Cheers,
Mo420
Ok so here's the story, my dad owns a 1997 w208 CLK320 sport coupe with the M112 V6 3.2L engine, mileage is currently around 125k kms. I have only started driving the car daily quite recently as I just sold my previous daily driver and currently waiting for a good deal for a new car.
Anyway, the problem with the CLK is that it has started to consume oil. Initially it wasn't too bad, just needs a top up every now and again between oil changes, and we managed to isolate the problem to leaked valve cover gaskets. This went on for quite a while (thought it wasn't an urgent repair) before we got the gaskets finally replaced last few months.
So now, here's the real issue. So far, after replacing the gasket, the oil consumption problem hasn't gone away, in fact it has only been getting worse. Much much worse, as currently it's consuming around 1L of Mobil1 5w-50 fully synthetic every 500kms!

Car drives fine, pulls great and kickdowns well etc etc. Only symptom is on most of the cold starts in the mornings (used to happen only once in a while now happens in 95% of cold starts) - I get a bluish smoke coming out of the exhaust, happens for about a minute or two, i.e. happens during fast idle only and stops when the revs start settling down to normal idle. After that, no bluish smoke whilst driving (no signs of smoke in my rearview). Another thing is, in one of the cylinders, cylinder 4 I think (front most, passenger side on my RHD vehicle), keeps getting very bad carbon buildup on the spark plugs. My last set of plugs lasted for only about 10,000kms I think

So far, the symptoms are pointing out to possibly an oil burning issue in cylinder 4 (maybe could also involve other cylinders). I'm not very well versed on these engines so please do feel free to share any thoughts/experiences/info/comments on a possible fix for this, massive thanks in advance!!

Cheers,
Mo420
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