SSenvy Posted May 25, 2012 Report Share Posted May 25, 2012 Well, i degreased my engine 3-4 weeks ago, since it was filthy from when i bought it. I used caution ( or atleast i thought i did ) Not being over excessive with water on the motor, only using what was needed to rinse off the degreaser. 2 days ago CEL popped up. Came up as PO332, which is Knock sensor, circuit low Input Bank 2. I cleared the code, it came back within 45 mins of driving, so i knew it wasnt just going to go away.... damn lol. I seem to Remember matt on the forum having this same problem, from washing his engine... and let me tell you, this is a spendy cleaning... They replaced both Knock sensors, and of course the gasket for intake, and charged me 4.5 hours labor..... 735 dollars later, ive got a sparkly clean engine. BE carefull when washing your engine, apparently, the water just sits on the top of the motor, runs down, and sits on top of the sensor, and shorts them out ( good chance anyway) its prolly well known by now, but i didnt know. When i told the mechanic my code, his first response was.... you didnt wash your engine you did you ? lol.... as a matter of fact.... Im really trying to laugh this F**k up off, but this really hurt the finances... oh well. I know there a lot of do it your selfers out there, but i just dont have time to pull a portion of the top of motor off, so im stuck getting bent over at the stealership. Off to the beer store......... Quote Link to comment Share on other sites More sharing options...
T-Bag Posted May 25, 2012 Report Share Posted May 25, 2012 Sorry to hear man but thanks for educating us. Good to know. Quote Link to comment Share on other sites More sharing options...
Silverad0 SS Posted May 25, 2012 Report Share Posted May 25, 2012 I pressure wash the hell out of my engine bay.... i might be more careful now lol sorry to hear that Quote Link to comment Share on other sites More sharing options...
SSenvy Posted May 25, 2012 Author Report Share Posted May 25, 2012 Just read invoice, also replaced the wiring harness for the sensors. Quote Link to comment Share on other sites More sharing options...
JC03SS Posted May 25, 2012 Report Share Posted May 25, 2012 Damn that sucks. I wash mine with a rag and cleaner only never use water. The old school engines you could do that but now with all the electronics no way I would. For you guys thinking of doing this just use some sort of cleaner on a rag and use old school muscle. Quote Link to comment Share on other sites More sharing options...
2001silverado364 Posted May 25, 2012 Report Share Posted May 25, 2012 Had the same exact same thing happen to my rear knock sensor when I washed mine, there's a tsb about it, infact. Except I was kiinda hoping it would take my knock sensors out so I squirted in that general vicinity really hard. Gave me an excuse to install my first cam as well. Quote Link to comment Share on other sites More sharing options...
SSilverBeast Posted May 26, 2012 Report Share Posted May 26, 2012 (edited) Thankfully that knock sensor is not anything that will hurt your motor...just makes you get shitty mpg's cause it's the sensor that regulates your fuel consumption ha Edited May 26, 2012 by SSilverBeast (see edit history) Quote Link to comment Share on other sites More sharing options...
f1ss Posted May 26, 2012 Report Share Posted May 26, 2012 Damn that sucks. I wash mine with a rag and cleaner only never use water. The old school engines you could do that but now with all the electronics no way I would. For you guys thinking of doing this just use some sort of cleaner on a rag and use old school muscle. Exactly what I do, just use a damp cloth with GP soap. Quote Link to comment Share on other sites More sharing options...
Link2603 Posted May 26, 2012 Report Share Posted May 26, 2012 Note to self don't wash engine. Got it Quote Link to comment Share on other sites More sharing options...
Silverad0 SS Posted May 26, 2012 Report Share Posted May 26, 2012 I've pressured washed under the hood at least 100 times lol Quote Link to comment Share on other sites More sharing options...
MARTYW Posted May 26, 2012 Report Share Posted May 26, 2012 I have heard of this same issue. I have washed mine once with no issue, but i just got lucky! Quote Link to comment Share on other sites More sharing options...
SSenvy Posted May 26, 2012 Author Report Share Posted May 26, 2012 Yeah, theres no garuntee if you wash your engine with water its going to Mess your knock sensors up, but why risk it? Unless you've got either 700 extra dollars you want to throw away, or 200 dollars in parts, and 6 hours labor by doing it yourself, i wouldnt chance it. If you Punch in Knock sensor failure for silverados, 90% of them is from washing the engine. Quote Link to comment Share on other sites More sharing options...
ThatTallCanadian Posted May 27, 2012 Report Share Posted May 27, 2012 I've pressured washed under the hood at least 100 times lol lmao me too man. always a really fast spray never sit and spray at a certain spot and "avoid" any sensors i can see Quote Link to comment Share on other sites More sharing options...
f1ss Posted May 27, 2012 Report Share Posted May 27, 2012 At car washes here, they have an engine compartment spray where it is a very light mist and works well. Used it on my truck but I get better results doing it by hand. You guys using the power washer, have any rust showing up? Quote Link to comment Share on other sites More sharing options...
SSilverBeast Posted May 27, 2012 Report Share Posted May 27, 2012 I say go over it with some water really quickly and then blow it off with an air compressor ha Maybe? Lol Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.