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  #1  
Old 09-08-2017, 06:27 PM
Jvan Jvan is offline
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knock sensor replacement

My "Check engine light" indicates I need to replace a knock sensor. How many "Knock sensors" does a SVX have?
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  #2  
Old 09-09-2017, 10:31 AM
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Re: knock sensor replacement

Two. The code should tell you which one is bad if I remember correctly.

Edit: 22 = right side, 28 = left side
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Last edited by SVX_MY_BABY; 09-09-2017 at 10:35 AM.
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  #3  
Old 09-09-2017, 11:34 AM
Jvan Jvan is offline
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Re: knock sensor replacement

Thanks for the info. I didn't pay attention after my mechanic said "knock sensor" so I don't know if he told me which side. I found a site on ebay which sells them for under $6 including shipping (not from China but Florida so I don't know about the effect of Irma),so I'll just order 2. Thanks again.
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  #4  
Old 09-10-2017, 09:39 AM
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Re: knock sensor replacement

I got mine from Rockauto.
This may help:
http://www.subaru-svx.net/forum/show...t=Knock+sensor
http://www.subaru-svx.net/forum/show...postcount=2631
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Last edited by SVX_MY_BABY; 09-10-2017 at 09:43 AM.
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  #5  
Old 09-10-2017, 03:12 PM
Jvan Jvan is offline
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Re: knock sensor replacement

I checked Rockauto and their cheapest knock sensor is about $30 while these from FL. are under $6 but I need to check if they are made in China (my guess is YES) but I need to wait until after IRMA destroys FL. to try and contact the seller.The photos are a great help since I didn't know where the knock sensors are located but it looks difficult to reach those sensors, even w/proper tools since I don't have small hands.
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  #6  
Old 09-11-2017, 02:04 PM
bheinen74 bheinen74 is offline
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Re: knock sensor replacement

better look up a contortion artist mechanic on craigslist with alien like fingers that is used to working on ufos
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  #7  
Old 09-11-2017, 05:56 PM
Jvan Jvan is offline
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Re: knock sensor replacement

After looking at those instructional photos, I ask why are the knock sensors so hided; guess the designers aren't mechanics.
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  #8  
Old 09-12-2017, 09:20 AM
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Re: knock sensor replacement

Quote:
Originally Posted by Jvan View Post
After looking at those instructional photos, I ask why are the knock sensors so hided; guess the designers aren't mechanics.
To do their job, they have to be on the block to sense the "Knock" in the motor, to keep timing in check....
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  #9  
Old 09-13-2017, 11:49 AM
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Re: knock sensor replacement

I replaced mine. It was a piece of cake! Especially since I already had the intake manifold off...
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  #10  
Old 09-14-2017, 12:36 PM
Jvan Jvan is offline
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Re: knock sensor replacement

I didn't mean to insult an engine designer but I realize they have to be in the block to do their job. Since I really don't know how they measure knock in all 6 cylinders from the center cylinders on each side, their placement could be in a more convenient location since they will eventually need to be replaced. As far as the replacement knock sensors for < $6, they are from China, not my first choice of manufacturing. I'll check w/Rockauto but they may also be from China.
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  #11  
Old 09-21-2017, 12:00 PM
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ShiuludeSVX ShiuludeSVX is offline
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Re: knock sensor replacement

Quote:
Originally Posted by Jvan View Post
I didn't mean to insult an engine designer but I realize they have to be in the block to do their job. Since I really don't know how they measure knock in all 6 cylinders from the center cylinders on each side, their placement could be in a more convenient location since they will eventually need to be replaced. As far as the replacement knock sensors for < $6, they are from China, not my first choice of manufacturing. I'll check w/Rockauto but they may also be from China.
If you have to pull the Manifold, then don't make yourself do it twice. Look at replacing the water hose on the right side of the engine top. It is a section about 4 inches long that runs front to back. I had to re-pull to get the hose redone when it blew out shortly after doing both sensors.
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  #12  
Old 09-21-2017, 04:13 PM
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Re: knock sensor replacement

Quote:
Originally Posted by ShiuludeSVX View Post
If you have to pull the Manifold, then don't make yourself do it twice. Look at replacing the water hose on the right side of the engine top. It is a section about 4 inches long that runs front to back. I had to re-pull to get the hose redone when it blew out shortly after doing both sensors.
All the vacuum lines too. I'm sure they're brittle.
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  #13  
Old 09-23-2017, 03:13 PM
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Re: knock sensor replacement

Ditto and ditto.
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  #14  
Old 09-24-2017, 09:04 PM
Jvan Jvan is offline
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Smile Re: knock sensor replacement

All good recommendations
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  #15  
Old 09-25-2017, 08:56 AM
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Re: knock sensor replacement

Hmm. I didn't find it very difficult to just slip in the box wrench & change the sensor without disassembling everything. (Passenger side)
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