M62TUB44 vs M62B46 - interchangeable?

[SlickGT1]

V10 will cost a lot more. I bet it doesn't run with a 4.4 motor with a 4.6 ecu. You would probably need ecu, cluster, and harness. Then you would need to code all the electronics to new ecu.

[epdarks]

So tell us about the moments leading up to the failure. Mine is approaching that mileage, need to know what to look and listen for.

[TerminatorX5]

It was business as usual - except I heard some whistle from the engine bay, as if it were some belt or something... I popped the hood, listened... it wasn't hissing, like from a vacuum, nor it was belt whistle when I was up close... it did sound like a sharpening stone, the kind that rotates and you sharpen a knife - the tone was rather of a higher pitch, as if the knife was of a smaller statute... As I realized in hindsight, that was the timing chain cutting through the last remnants of the plastic guide... About 45 miles the car sounded like a tractor but sitting inside I had no clue - it was rolling fine, accelerating fine, no messages on the board... The passer-bys kind of flagged me, so I rolled the window down and that's when I heard "tractor"... while my slow brain was trying to apprehend what was going on, the dash lit up with some scary messages, and I started to pull off the main drag into some parking lot - as soon as I stopped, I just shut the engine off... it was off since that time... The engine is apart now, and the mechanic says that it might be better to get a used one and slap it in... it might work with normal engine, but stupid me got myself a rare breed... lol... me and mechanic are still talking about it... sooner or later, something is going to give... either we will get it fixed, or i will sell it as it is....

[x5Alpine]

the car will be a classic someday as they only made about 3,000 4.6is's, so if it were me I would go for an engine rebuild.

[TerminatorX5]

hahaha... by the time the car will be classic, i will turn into antique!!! but I am still debating, as wife wants a fresh ride, and she is eyeing up a 2010-2013 3-series... At this rate of financial downfall, I can only lease, and I am looking into ED leasing options and into taking over a lease with a lot of available miles (she drives a lot), looking into swapalease website...

nothing is carved in the stone yet...

[jcp240z]

This maybe a foolish question but did you ever get ahold of Alpine M3 who was parting out the 4.6is. He was last active in June.

[TerminatorX5]

I tried to get hold of someone who was parting a 4.6iS on this forum, but i have not heard back...

[Gurjit]

just tear the heads off, check for piston damage and just repair the valvetrain if the bottom end is good

[amacman]

A leak down test of the cylinders will be way easier than pulling the heads of for starters . You might be lucky and just need new chains and guides .

And the 4.4 engine might work out as the capacity is only 25 cc - ish per cylinder less , use all the 4.6 manifolds etc . On the other hand you might blow the 4.4 quickly due to overfuelling but a remap of the ecu might work if you find someone who knows the figures to detune your ecu .

[Gurjit]

oldschool v6 nissan valves touched pistons> no piston damage