I just bought a rebuilt block and have it about 80% completed but when I took the knock sensor off the old block to put on the new block, there's no port for it. ​​​​Now what? I can't not have one or the ECU is going to throw codes at me all day long.

It's an '86 4x4 pickup w/ auto-trans.


Old knock-sensor mount hole

Where the hole should be. The capped port below is an oil galley port.

 

20r donor block, what does the other side look like?

 

Exhaust side. Looks exactly the same as my old block, same model stamp too "22R"

 

11401-35022, 84-85 Celica.
https://parts.toyotaoffortworth.com/...140139367.html

 

Balls, I know about those blocks too. The only ones without a knock sensor mount. I never guessed I would run into one though. Thanks for figuring that out.

I guess I'm going to make my own mount. Looks like a M12 x 1.25 tap. Would it be better to use the flat circular spot just below the fuel filter or bore out one of the unused mounts near the oil sensor?

 

ECU I expect is just taking amplitude levels and not timing between ignition trigger, ignition fired, and peak knock sensor amplitude. Just because that's a lot of math for an 8bit CPU and a lot gets lost in the rounding for decimal math.. 3-6000m/s, 110 ignitions/s at 6500rpm

Given that the ECU doesn't care where it is as long as it's in the block. I'm not coming up with any reason, that's not a hazard everywhere else, you couldn't expand the hole in the oil gallery. My only real concern is if you get a bit stuck and crack out the block. Blowing out the mount ear you've got three more tries before you need a good cast steel brazing guy or a new block..

 

Yep, as long as it's in the block it should work. Thanks again for the help.

LC Engineering had a small article about relocating the knock sensor and recommend the lowest unused mount point, so that's the one I bored and tapped.