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help with part on 93 chevy 1500 truck
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cadotter
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Jul 5, 2014, 4:27 PM
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help with part on 93 chevy 1500 truck
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here is an image of a part I'm trying to figure out what it is. I have a 93 Chevy with a 305 small block and a manual tranny. I have a small oil leak and think this is the problem it's located on the bottom passengers side of the engine block and its right by the oil pan a few inches away also it has an electrical connector to it. please help!
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Hammer Time
Ultimate Carjunky
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Jul 5, 2014, 4:56 PM
Post #2 of 14
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Re: help with part on 93 chevy 1500 truck
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That is a knock sensor but it doesn't contain or seal out any oil.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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cadotter
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Jul 5, 2014, 5:02 PM
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Re: help with part on 93 chevy 1500 truck
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OK thanks for the quick response can you possibly tell me why I would have a slow leak on passenger side then? I already changed valve cover gaskets as well as my PVC Amy suggestions?
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cadotter
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Jul 5, 2014, 5:10 PM
Post #4 of 14
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Re: help with part on 93 chevy 1500 truck
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also when I search for a replacement part it looks like it has a different end is this one busted?
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Hammer Time
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Jul 6, 2014, 1:19 AM
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Re: help with part on 93 chevy 1500 truck
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Yes, it looks like the plastic is broken off yours
I can't tell you what is leaking on your engine. You need to clean it off thoroughly and then determine the origin of the leak.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Jul 6, 2014, 1:21 AM)
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cadotter
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Jul 6, 2014, 5:24 PM
Post #6 of 14
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Re: help with part on 93 chevy 1500 truck
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thanks for your help!! and I'll keep checking for that leak
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Discretesignals
Ultimate Carjunky
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Jul 7, 2014, 12:26 AM
Post #7 of 14
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Re: help with part on 93 chevy 1500 truck
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To help you find the oil leak the best thing for you to do is clean off the engine. Then see where the leaks are coming from. Looks like it needs pressure washing...lol.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
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Jul 7, 2014, 1:20 AM
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Re: help with part on 93 chevy 1500 truck
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Thoughts on this: Isn't oil pressure switch over this area? Check that as it would drip down and can fast sometimes.
* If you have steel (think so) valve covers and didn't straighten them for new gaskets or over tightened them they could be leaking as bad or worse now.
Yes - cleaning the area off and looking up and most forward for it to return would be the best but doing so you could get doused with crap spraying up from under!
Of course you could put the vehicle on its roof but a bit tricky (kidding) to do that.
It look fast enough you'll find it with a good look,
T
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cadotter
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Jul 8, 2014, 4:57 PM
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Re: help with part on 93 chevy 1500 truck
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OK guys thanks for all your help bit replacing the knock sensor did stop the oil leak.
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Tom Greenleaf
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Jul 8, 2014, 9:37 PM
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Re: help with part on 93 chevy 1500 truck
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Thanks for posting your fix. I'll lock this thread up to keep the spammers out and you can request it opened up again by any moderator,
T
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Hammer Time
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Jul 8, 2014, 10:31 PM
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Re: help with part on 93 chevy 1500 truck
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I think you may find out that you are wrong about that. There should be no oil associated with the knock sensor and i can see from the picture that the oil residue was much higher than the sensor itself and oil doesn't flow uphill.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
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Jul 8, 2014, 11:09 PM
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Re: help with part on 93 chevy 1500 truck
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OK - Open again. I can say perhaps just fate that I've never known of a knock sensor to leak oil so don't know if it's exposed to crankcase oily vapor?
Looked hard and can't confirm that. Did find that for a manual trans it's a different part # is about all? Not sure why that would matter either.
Pics large but show oily mess. Near all leaks of the sort will be highest and most forward of evidence,
T
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Hammer Time
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Jul 8, 2014, 11:25 PM
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Re: help with part on 93 chevy 1500 truck
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Knock sensors normally go into a blind hole in the block. I believe being in contact with oil would effect it's operation so they are designed to contact block surface only.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
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Jul 8, 2014, 11:40 PM
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Re: help with part on 93 chevy 1500 truck
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As said - never had or heard of a problem with them so plain dunno? One showed thread sealer on threads new one didn't? Said NOT to use anything that would interfere with it grounding to block was really all.
Worried that this oil leak isn't really fixed so worth paying attention. I still think many times oil leaks from up high like valve cover gaskets are a problem with PCV not able to overcome normal blow-by either clogged or engine wear (is a '93) the root cause.
So yes - keep an eye on this to return, T
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