Date registered: Dec 2004
Vehicle: CURRENT: 2007 CLK550 Cabriolet, 2002 C240 FORMER: 2001 ML320
Location: Birmingham, AL
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OK, I finished the valve cover job. I'm sorry I wasn't able to take photos - it was too messy to stop and deal with a camera. I do have some advice though:
1. Be prepared to replace some rubber hoses! The breather cover vent lines on mine were so hardened that they could not be removed without breaking.
2. Replacing the breather hoses means removing the MAF. The plastic retainer on the MAF was so brittle, it broke!
3. I went ahead and replaced the spark plugs, too, and the left rear plug is a real b!tch. You WILL need a universal adapter for your socket wrench.
4. Get yourself a good small torque wrench. Somewhere, I have an "inch-pound" wrench with a dial indicator, but I couldn't find it, so I had to improvise with a 3/8 click-type that didn't go quite low enough.
I had ordered the gaskets and plugs (used the Bosch Iridium) from autohausaz. I had to run to the dealer to buy the hoses and MAF bracket. I replaced all four hoses - one on the right, two on the left, (the small one on the left is in two pieces), plus the Y connector in front of the MAF and the MAF retainer - all about $75 retail.
Had it not been for the hoses, I'd probably have done the job in about 3 hours, but dealing with the MAF added at least an hour, maybe more. I also found that the main vacuum intake connector for the power brake booster is broken. I suspect this is why the engine runs fast at idle and the brakes are hard at start-up. I put some sealant on it, but I suspect it will need replacing. It's $90 retail, but the dealer has to order it.
I haven't started the engine yet (waiting on the sealant to cure) but I'll keep you posted when I do in the morning.