engine and drivetrain 2002 tii engine swap

[luckytoesj]

How realistic is the job of swapping out an egine from a 1972 2002 and putting in a Tii motor from the same year? I found a cheap and in great condition Tii motor locally and want to know if the job would be doable. Thanks

[_z_]

I'm doing a similar swap (its been on hold with all the rain and work -- hoping to get it finished here after Taxes finally get done)

Anyway, its not a huge deal. You've got to replace the fuel pump with a high pressure type and probably run a new line up front. You might need to fart around with the throttle linkage some and the standard tii air intake won't fit due to the different brake booster.

I was just going to use a cheap K & N filter till I got around to changing the booster, and I'm using an in tank pump from an e30 to power the Kugelfischer

Now I assume you're going to keep the tii fuel injection intact -- swapping that over to carbs or EFI is yet another complication. If the existing fuel injection system is functional and the rest of the engine is good it shouldn't be a huge deal.

I hope not cos like I said i'm doing the same thing

OH. The other complication is if you want to use a strict tii cold start system. The TII has a thermo time switch that squirts extra fuel via the cold start injector when the temp is cold. If you want that to work like a tii you need that thermo-time switch (which are hard to find).

My plan (and this is done a lot when the thermo-timer fails) is to just hard wire the cold start injector to a button in the cockpit and push that when starting cold.

Do a search for thermotime or cold start tii -- there are a number of good posts that describe that system. Me, i'd just hard wire it & not worry about wiring it up true tii style

best of luck!!

-zachary

Edit: also you'll need a tii starter and tii alternator (i'm pretty sure you do).. if those come with the engine you're set!

[jgerry2002]

Keep in mind that the E30 pump will probably not have enough flow for the tii pump.

[_z_]

ya i'm not 100% sure it will work. I've got two pumps.. one from a 320is and one from a later 318

the 320is pump has a much larger fuel outlet tube.. nearly 1/2 an inch. I think its up to it. I figure i'll try it and see.. but likesay a real tii pump or a 5 series pump (I think it is .. as seen on www.my2002tii.com) might be more the thing to use. Since i've got those e30 pumps i was going to give them a try rather than shell out more dosh

[ray_]

best of luck!!

-zachary

Edit: also you'll need a tii starter and tii alternator (i'm pretty sure you do).. if those come with the engine you're set!

U sure that the alt is different? Other than mounting in a different area, I think it is the same (someone correct me).

Is the starter different due to the little support bracket attachment points, or...?

Cheers,

Ray

[SteveJ]

The alternator housing is different. The upper mounting 'ear' is longer to fit into the tii bracket. As for the output, I believe it is the same as all later 02's , but may be higher that the early non-tiis.

[_z_]

the alternator is different. I remember trying to put a tii alternator into my 1970 and it wouldn't fit right

tii alternator part# 12311354152

2002 alternator part# 12311353422

the FAQ alternator swap faq has some clues (it applies ot only non tii s)

http://www.bmw2002faq.com/content/view/37/32/

For the starter the solonoid is on a different side. I remember trying to put a tii starter into a non-tii and it didn't want to fit ( soon after I started separating my tii parts from non=tii cos I kept doing that!!)

Now I might be smoking crack here.. cos www.realoem.com shows the tii starter and non-tii starter are teh same part#

I have both tii and non-tii starters down at the shop.. i'm gonna check em out later on today and see whats what

[SteveJ]

The starters are probably the same.

The rear mounting bracket for the tii starter will have the extra support for the intake stuff.

[peteinjp]

however the starters rear throttle body support is a good thing to use.