Replacing knock sensor?

[Flebes]

My check engine light had been illuminated so I checked the codes and a faulty knock sensor was reported. I cleared the codes, waited a while, and sure enough the same code reappeared. So, it looks like there might be a problem here. My plan of attack is to first check/clean the connection then replace the knock sensor if neccesary. Only one problem - I can't seem to find the darn thing. I was looking on the block last night and could not seem to find it. After doing a little reading this morning, it seems like I might have to remove the fan or intake manifold to get to it. I quess my question is what is the best way to get to the sensor. Thanks.

BTW 91 740 (non turbo)

[dpauto.com]

91 740, the knock sensor is mounted on the block under the intake manifold. All you need is a 12 mm wrench or socket to remove it. A dealer would sell one for around $84.

Dave