Aw, c'mon you guys! Steve? Johninky?

[Hachiroku $B%O%A%m%/(B]

I posted something here asking about the location of the knock sensor. I
opened the hood and looked but I don't see it. A description from the
spring said it was somewhere under the intake, near the starter, but I
don't see it!

 

[S]

Hi Hachiroku!

I posted something here asking about the location of the knock sensor. I
opened the hood and looked but I don't see it. A description from the
spring said it was somewhere under the intake, near the starter, but I
don't see it!

The knock sensor, at least on the SOHC motors, is bolted to the top of
the engine block, toward the rear of the engine, just to the left
(drivers side) of center. You'll probably need to pull the plastic
intake plumbing to see it clearly, as it is sorta below the throttle
body.

Look for a black plastic thingie (technical term ;-), about 1 1/4 inch
in diameter by an inch tall with a bolt thru the center (12mm head
IIRC), and leads running off toward the rear.

Once you locate it, it is easy to reach with a socket and extension.
Be sure to clean off the block a bit before bolting the replacement in
place, as it needs a good ground connection to work properly.

Hope this helps.

ByeBye! S.

Steve Jernigan KG0MB
Laboratory Manager
Microelectronics Research
University of Colorado
(719) 262-3101

 

[Hachiroku $B%O%A%m%/(B]

Hi Hachiroku!



The knock sensor, at least on the SOHC motors, is bolted to the top of
the engine block, toward the rear of the engine, just to the left
(drivers side) of center. You'll probably need to pull the plastic
intake plumbing to see it clearly, as it is sorta below the throttle
body.

Look for a black plastic thingie (technical term ;-), about 1 1/4 inch
in diameter by an inch tall with a bolt thru the center (12mm head
IIRC), and leads running off toward the rear.

Once you locate it, it is easy to reach with a socket and extension.
Be sure to clean off the block a bit before bolting the replacement in
place, as it needs a good ground connection to work properly.

Hope this helps.

ByeBye! S.

Steve Jernigan KG0MB
Laboratory Manager
Microelectronics Research
University of Colorado
(719) 262-3101

I'm actually looking for it because the car overheated, and one of the
guys I mentioned in the header said if the knock sensor is melted, the
block is probably trash.

But thanks, I'll have another look Sunday...

 

[Hachiroku $B%O%A%m%/(B]

Didn't respond because didn't myself know its location.

http://www.lovehorsepower.com/SubaruDocs/subaru_legacy_knock_sensor.htm

Why, thank you!

I tried googling it, but I guess I worded it wrong.

Now I know where to look!

 

[johninky]

I posted something here asking about the location of the knock sensor. I
opened the hood and looked but I don't see it. A description from the
spring said it was somewhere under the intake, near the starter, but I
don't see it!

Didn't respond because didn't myself know its location.

http://www.lovehorsepower.com/SubaruDocs/subaru_legacy_knock_sensor.htm

 

[Hachiroku $B%O%A%m%/(B]

Hi Hachiroku!



Yea, I'd say so.

Probably a better test would be to run a compression check. If all
four cylinders have good compression (140+ PSI), and the numbers are
even all around (not more than 5 - 10 PSI variation), you're probably
OK. If one or more are low, you have probably warped a cylinder head.
If the engine has gotten hot enough to injure the block, you will
almost certainly have warped the head(s).

I thought I had the problem licked, and I drove a little further out than
I should have. By the time I got home, the temp guage was pegged.

The last time I started it, there was white smoke coming from everywhere.
Now, I know there was an exhaust leak, but this will sure help you find
any leaks in the system!

i got the car for $100 with an 'overheating' problem. It has 335,000 on
the body, and ~120,000 on the motor.

I know the EJ22 is a good motor, but somehow, the gaskets went bad on this
one. Improper installation?

I'm debating either redoing the heads, or getting a new motor. Whichever
is cheaper. One thing, the motor was running good, and it sure was a
strong motor!

 

[S]

Hi Hachiroku!

I'm actually looking for it because the car overheated, and one of the
guys I mentioned in the header said if the knock sensor is melted, the
block is probably trash.

But thanks, I'll have another look Sunday...

Yea, I'd say so.

Probably a better test would be to run a compression check. If all
four cylinders have good compression (140+ PSI), and the numbers are
even all around (not more than 5 - 10 PSI variation), you're probably
OK. If one or more are low, you have probably warped a cylinder head.
If the engine has gotten hot enough to injure the block, you will
almost certainly have warped the head(s).

I don't recall your original post on this, but I seem to remember that
you are dealing with an older Legacy. EJ22 motor? These things are
pretty tough., and unless you continued to run it until it actually
seized from lack of lubrication, the block is probably OK. If in
doubt, tho, you should be able to find a good used motor at a salvage
yard for $500 or so. IMO, it's probably easier to simply do the engine
swap than to mess with the cylinder heads with the engine in the car.

Good Luck with the project!

ByeBye! S.

Steve Jernigan KG0MB
Laboratory Manager
Microelectronics Research
University of Colorado
(719) 262-3101