how to and tools to R&R knock sensor 4.3L code W

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how to and tools to R&R knock sensor 4.3L code W

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Blazer >> Mechanical & Maintenance >> Engine & Transmission >> how to and tools to R&R knock sensor 4.3L code W

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how to and tools to R&R knock sensor 4.3L code W - 6/29/2008 5:55:53 PM

raylo

Posts: 21
Joined: 6/29/2008
Status: online

I managed to break the plastic insulator off the drivers side knock sensor during an intake manifold gasket job. D''''''''ohhhhh! 22mm wrench turns the nut and innards of the sensor round and round but does not turn the housing that is threaded into the cylinder head. The housing itself is round and I can''''''''t see what to use on it except for maybe a pipe wrench.... if I can get one in there. Anyone have personal experience or perhaps a GM service manual that explains how to do this?

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< Message edited by raylo -- 6/29/2008 6:07:09 PM >

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RE: how to and tools to R&R knock sensor 4.3L code W - 6/29/2008 6:02:43 PM

swartlkk

Posts: 12842
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

I would actually see if you could clamp down on the sides with a pair of vice grips or something similar to crimp the sides a bit harder, then try the hex again.

I have some more ideas if that doesn''t work, but I''ll have to make up some pictures to illustrate... It''s difficult to explain.

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RE: how to and tools to R&R knock sensor 4.3L code W - 6/30/2008 3:06:51 AM

raylo

Posts: 21
Joined: 6/29/2008
Status: online

That may be worth a try. But it looks like the darned things are installed with red thread locker so it''ll take aome real torque. Not sure if any crimp will be up to that. Bt I''ll give it a try tonight. Please let me know what your other ideas are. I have a few, also, but most may be more trouble than pulling the head. BTW, I have the intake and valve cover off so head removal is doable... except for the seriously rusted exhaust manifold bolts that will no doubt break. I don''t need an additional day of work because of that.

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Post #: 3

RE: how to and tools to R&R knock sensor 4.3L code W - 6/30/2008 11:33:12 AM

Hanr3

Wheels & Tire Moderator
Posts: 3376
Joined: 5/11/2005
Status: offline

I prefer vise grips when I need serious holding power in a pair of pliers. I have clamped them so tight that I have bent the vise grips beyond any future use. However it did teh job. IT just take a ton of wrist strength.

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RE: how to and tools to R&R knock sensor 4.3L code W - 7/3/2008 3:41:39 AM

raylo

Posts: 21
Joined: 6/29/2008
Status: online

Got that sucker! I tried the channel locks... not enough grip. The vise grips did the trick. No finesse, just brute strength. Sometimes that''s the only way. :-)

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Post #: 5

RE: how to and tools to R&R knock sensor 4.3L code W - 7/3/2008 7:31:40 PM

Hanr3

Wheels & Tire Moderator
Posts: 3376
Joined: 5/11/2005
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Yes it is....
Glad to hear it. I too have a few other tricks, however they get progressively more destructive and more costly.

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"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan

'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sons DD, engine swap is done.
'00 S10-Blazer 4x4x4 - My

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RE: how to and tools to R&R knock sensor 4.3L code W - 7/5/2008 7:44:47 AM

raylo

Posts: 21
Joined: 6/29/2008
Status: online

I think the next step would be somethng like drilling a 1/4 or 3/8" hole all the way through, and inserting a hardened metal rod to pull or hammer on. The casing on the sensor is thicker and toughr than I though so this approach might work. Glad I don''t have to test that though. :-)

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Post #: 7