Jellybean Posted April 12, 2016 Share Posted April 12, 2016 I heard you have to modify the block , bore out to a 10mm from OEM 8mm? Is this a big job to do in situ? Link to comment Share on other sites More sharing options...
Mike2JZ Posted April 12, 2016 Share Posted April 12, 2016 Could you find an adapter that will fit a 10mm sensor into 8mm hole? Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 12, 2016 Share Posted April 12, 2016 You can just use an 8mm bolt and a washer, or make a stepped stud or a stepped bolt, with 8mm in the block and 10mm in the sensor if you are that fussy. Link to comment Share on other sites More sharing options...
Jellybean Posted April 12, 2016 Author Share Posted April 12, 2016 You can just use an 8mm bolt and a washer, or make a stepped stud or a stepped bolt, with 8mm in the block and 10mm in the sensor if you are that fussy. Garage was talking about boring out the block to 10mm , said it was tight in there , could take some time ; Wideband knock is just a nice to have though Link to comment Share on other sites More sharing options...
Wez Posted April 12, 2016 Share Posted April 12, 2016 I would not be boring out the block, loads fitted without the need to do this. Link to comment Share on other sites More sharing options...
Nodalmighty Posted April 12, 2016 Share Posted April 12, 2016 The factory Knock sensor is 12mm. Toyota themselves do a 12mm to 8mm step stud for the 2zz-GE engine. Bosch wide band knock sensor is 8mm bore. Link to comment Share on other sites More sharing options...
Jellybean Posted April 12, 2016 Author Share Posted April 12, 2016 The factory Knock sensor is 12mm. Toyota themselves do a 12mm to 8mm step stud for the 2zz-GE engine. Bosch wide band knock sensor is 8mm bore. Thanks , thats good news! Link to comment Share on other sites More sharing options...
Nodalmighty Posted April 12, 2016 Share Posted April 12, 2016 (edited) Thanks , thats good news! Just for you : 90126-a0008 It's specially designed to nest up against the base of the blind hole for maximum transfer. NEVER use a washer with a Bosch Knock sensor. Edited April 12, 2016 by Nodalmighty (see edit history) Link to comment Share on other sites More sharing options...
Jellybean Posted April 12, 2016 Author Share Posted April 12, 2016 Just for you : 90126-a0008 It's specially designed to nest up against the base of the blind hole for maximum transfer. NEVER use a washer with a Bosch Knock sensor. Fantastic Thanks! Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted April 12, 2016 Share Posted April 12, 2016 Yes as said the Bosch sensor needs direct contact with the block, no need for a different sized bolt/stud, as long as it locates and is tight it will be fine, fitted the same to my Supra, using KS-4 knock detector. Link to comment Share on other sites More sharing options...
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