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scott
01-27-1999, 11:44 PM
Three questions. First, how do you change the NiCad batteries in a 750. Second, is there any special tools or technique when it comes to changing spark plugs in this car. I've worked on a lot of different cars and the access in this 750 is very limited. Third, anyone know of an American Car BOSCH O2 sensor that crosses over to BMW. I ahve read that a Ford Mustang uses a BOSCH three wire O2 sensor and that it works just fine in the BMW's and they only cost $40.00. I just put a BOSCH unit in my Chevy truck and it cost $25.00.<br>

Scott
01-27-1999, 11:46 PM
<p>: Three questions. First, how do you change the NiCad batteries in a 750. Second, is there any special tools or technique when it comes to changing spark plugs in this car. I've worked on a lot of different cars and the access in this 750 is very limited. Third, anyone know of an American Car BOSCH O2 sensor that crosses over to BMW. I have read that a Ford Mustang uses a BOSCH three wire O2 sensor and that it works just fine in the BMW's and they only cost $40.00. I just put a BOSCH unit in my Chevy truck and it cost $25.00.<p><br>

Callan
01-27-1999, 11:59 PM
You need some patience and a magnetic sparkplug socket really helps. If I remember coorectly it's a 5/8" body size plug. Put silicone spray on the boot ends before reinstalling and pull the brake fluid resevoir off the master cyl. for more room on cyls. 7-12. Take the washer fluid tank out to access cyl.1-6[you can leave it off to the side] Be careful with high mileage plug wires as the V-12s are bad about these breaking at plug changing time. There are repair boot kits to save the plug wire set but usually only the dealers and BMW specialists have the tools to do the job. Put anti-seize compound on the plug threads and sit back and wait for the intake manifold gaskets to go bad next after you've owned the car for a while.

scott
01-28-1999, 12:16 AM
Thanks for the info Calllan. The car has 92K on it. I have read something about intake gaskets going bad. Any idea as to what mileage or is it a time related thing? How many hours are we talking about changing them? Speaking of spark plugs, whats the hot ticket. I usually use BOSCH platinum plugs.<br>

Callan
01-29-1999, 11:04 PM
I can't really pin down a time limit on the gaskets. You just get a bad running car in the morning for awhile until they seal up a little. If you buy the special magnetic Long! 10mm socket tool from a BMW dealer, then expect to spend about 2-4hrs changing them as well as any leaking valve cover gaskets or rubber fuel hoses too. This job is not! for people who aren't mechanically inclined. I'm sorry I haven't gotten the part# for the paper version repair manual yet. Will do so monday, & got your E-mail too.


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