relocating knock sensor help. Options

[IllIllIll]

I have a bad engine in my 97 GT. I removed the bad engine, & I bought a good running engine that was well maintained out of a smashed 5th gen celica. Since they are both 5SFE engines, I thought it would bolt in with no problems, other than swapping over the crank position sensor, & a few other sensors & brackets.

I tried looking up info using the search feature, but I found little info, that I could use. Anyway, I have both motors here in my garage, & I was swapping over all of the sensors, & brackets & stuff, & I realized that I don't have a place to mount the Knock sensor on my replacement engine.

Is it bad to relocate the knock sensor? I was going to carefully drill into a unused smaller bolt hole, & tap the right threads into the hole. But I don't know if the spot I select will be as good as the stock spot, or worse, or if it will even matter to the sensor. The stock location is in the top of the block near the head, & the spot I am considering is near the middle of the block.

I have OBDII, & I am using a OBDI engine as a replacement engine. I don't care that it is older, it runs & mine doesn't. I thought that they all came with knock sensors. Anyway I can post pictures tomorrow if that will help. I really need to get my celica running soon, as my other car is a POS with no AC.

[94st_santos]

im wondering the same thing, only im using the 4a block with the 7a head and ecu. i have been showing the knock sensor trouble code since ive swapped and havent figured out a way to surpass it and its been retarding my ignition timing, which isnt very convinient.

[x_itchy_b_x]

iirc the knock sensor is a finely tuned microphone that listens for abnormally loud noise ie: knock. the placement is something i would think would alter the tone it would normally react to, but i think as long at its somewhat near the top of the block where it hears the violent explosion you should be good. use good judgment for finding a suitable hole.

[presure2]

I have a bad engine in my 97 GT. I removed the bad engine, & I bought a good running engine that was well maintained out of a smashed 5th gen celica. Since they are both 5SFE engines, I thought it would bolt in with no problems, other than swapping over the crank position sensor, & a few other sensors & brackets.

I tried looking up info using the search feature, but I found little info, that I could use. Anyway, I have both motors here in my garage, & I was swapping over all of the sensors, & brackets & stuff, & I realized that I don't have a place to mount the Knock sensor on my replacement engine.

Is it bad to relocate the knock sensor? I was going to carefully drill into a unused smaller bolt hole, & tap the right threads into the hole. But I don't know if the spot I select will be as good as the stock spot, or worse, or if it will even matter to the sensor. The stock location is in the top of the block near the head, & the spot I am considering is near the middle of the block.

I have OBDII, & I am using a OBDI engine as a replacement engine. I don't care that it is older, it runs & mine doesn't. I thought that they all came with knock sensors. Anyway I can post pictures tomorrow if that will help. I really need to get my celica running soon, as my other car is a POS with no AC.

ok.
if your "new motor dont have a provision for a knock sensor, that would mean its a 5s that was made before 1992.
i wouldnt trust a motor thats that old, #1.. and #2 drilling your block for a knock sensor is not the right thing to do, unless you located it exactly where toyota intended.
the knock system on these motors are critical to theyre proper operation.

[IllIllIll]

ok.
if your "new motor dont have a provision for a knock sensor, that would mean its a 5s that was made before 1992.
i wouldnt trust a motor thats that old, #1.. and #2 drilling your block for a knock sensor is not the right thing to do, unless you located it exactly where toyota intended.
the knock system on these motors are critical to theyre proper operation.

I know that the engine is older than mine, but I also know it is in better condition than my dead engine. It runs. It doesn't smoke or ping or knock & it had the timing belt changed with Toyota parts not long ago. There was no sludge when I pulled the pan, & no rust in the coolant passages. The oil was pretty clean as were the spark plugs. It has good compression. My dead engine had so much rust & scale in the coolant passages that it is no surprise that it overheated so bad. All the things I've checked were well in spec for the engine. It looks like it has a new water pump as it isn't as old looking as the rest of the stuff. The clutch & flywheel also is new looking. I only paid $225 for the engine intake manifold & exhaust manifold.

I don't have the money or time or experience to rebuild my other engine right now, or I would have done that. I talked with a friend of mine, & he said that since it is stock, & I'm not going to race it or anything I could get away with just plunging it in & mounting it somewhere quiet. The local gas station sells premium at regular price on Tuesdays, so I can always run Premium, so that should help avoid knock too. If I had the money & the time I would have got a 3S or a V6 and made that work instead. This is only a temporary engine anyway. I just want to enjoy the summer in my convertible.

This post has been edited by IllIllIll: Jun 21, 2007 - 8:20 PM