Xoutpost.com - M62TUB44 vs M62B46

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Quote:

Originally Posted by Lasse-SL-500 (Post 987738)

Old thread, just wanted to say if anybody reads this - something self experienced, I had this repaired in my own engine:

chainguides are a big problem regardless of M62, M62TU or S62. The old M60 doesn't have the problem though. It stems from the fact that BMW removed a gear when they did the M62 development (cost savings probably), and instead relied on chain guides to do the work of the gear that is in the M60.

These chain guides are coated in PLASTICS. No wonder that plastics breaks with age.

SO: regardless if you get another M62, TU or S62, you will get the same problem. Chain guides need to be replaced around 170 K miles.

That said, it's obvious that TerminatorX5 should rebuild his M62B46.

I would have rebuilt the engine, but we live in a "throw-away" society - once a TV, or a computer, or refrigerator breaks, we just toss it and get a new one... granted, a car is much more expensive than a refrigerator, but after so many years and miles the value is far less than someone (me!) is willing to invest into... I got rid of the 4.6iS in May of 2013, and have a 4.8iS now (in E53 bodystyle, just can't bring myself to E70, or god forbid - to F15!!!). It was the only financially feasible option, given the value, the cost of parts and labor and the offer to sell AS IS.

I loved that car, it was with me in a few countries, crossed some hanging bridges over mountain creeks, pulled through torrential rain in rain forrests, drove on beach dunes in some wild beaches, witnessed some crooked cops/paramilitary dudes with machine guns, endured some serious snow and cold in Russia... but, it was time to let it go...:(

If it was with you for that much I would've rebuilt the motor because of some serious sentimental values.

I spent about 2200 USD to have it rebuilt; you have to dismount everything in the front (radiator etc), so you can remove the front cap and get to the chain guides. I had all chain guides replaced, all three cam chains new, new chain tensioner, new gaskets everywhere and new new drive belts.

When it was together again we did a rinse, filled her up with regular standard oil, a little diesel and STP engine flush, started it and let it idle for 30 minutes. Then we flushed the oil together with a lot of goo that came out -- then new Castrol oil and filter. I also had the valve caps repainted silver (the old BMW color flakes)

It was 2200 dollars to have it done, with material. But now I have a fresh engine, everything worn replaced. The chain guides are a problem in all M62/S62 engines, unfortunately.

LSx swap and make it RWD only, FTW...that's going to be the first thing I do once the engine or trans drops in my X5. I wish I'd done it in my 7, but instead $14k later I've got a rebuilt engine in my car from www.bavengine.com