Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

engine knocking in the rain

Old 08-Oct-2005, 11:31 PM
  #1  
Registered User
Thread Starter
 
imported_kubu's Avatar
 
Join Date: Aug 2004
Location: Hamilton
Posts: 103
engine knocking in the rain

I have an 02 ep3 and last year I had a CAI on it. I drove thru this big puddle this one day in the rain. The car did not shut off nor did anything abnormal from the engine. That was until I drove another kilometer and there came knocking sounds from the engine whenever I drove over 30km/h. I immediately went home and changed the engine oil. The car seemed to run fine after that except that since then, knocking sounds have been coming from my engine only when it rains. I know its from the engine because when I shut it off, the sound stop as the engine turns off. I have placed the stock airbox back as well and still the same thing. Now if anyone can give me guidance as to what the problem is, that would be much appreciated. Thanks in advance.

Kevin
imported_kubu is offline  
Old 08-Oct-2005, 11:43 PM
  #2  
Registered User
 
1ofAkind's Avatar
 
Join Date: Jul 2003
Location: TDOT
Posts: 550
isn't your car still under warranty? if it is...slap back on the stock air box and take her in.that's weird that only makes the knocking noise when it rains...try running ur stock air box and see if it happens for starters.Who knows,the CAI is probably picking up water somehow or something else is wrong but that's first thing i'd do,besides there's rain in the forecast this upcoming week
1ofAkind is offline  
Old 08-Oct-2005, 11:45 PM
  #3  
Registered User
Thread Starter
 
imported_kubu's Avatar
 
Join Date: Aug 2004
Location: Hamilton
Posts: 103
It is but I'm nervous to bring it in because the CAI voids the warranty. Since I had to cut metal to fit the CAI, they may know I had one. Thats why I want to get advise here first.
imported_kubu is offline  
Old 08-Oct-2005, 11:46 PM
  #4  
Senior Member
 
imported2nv's Avatar
 
Join Date: Jan 2004
Posts: 3,145
piston slap you may have taken water into your oil pan thus removing the lubricant from the bearing this will cause big problems if you dont fix it.
\
imported2nv is offline  
Old 08-Oct-2005, 11:48 PM
  #5  
Registered User
 
1ofAkind's Avatar
 
Join Date: Jul 2003
Location: TDOT
Posts: 550
there u have it from someone who knows his Shyte.Look into what he said and put that stock air box back on before it rains.If u wanna run the CAI u might wanna invest in a Bypass so u don't get water in there. Danny looking good in the EF....have you on video on the Hwy tonight
1ofAkind is offline  
Old 08-Oct-2005, 11:50 PM
  #6  
Registered User
Thread Starter
 
imported_kubu's Avatar
 
Join Date: Aug 2004
Location: Hamilton
Posts: 103
Originally posted by imported2nv
piston slap you may have taken water into your oil pan thus removing the lubricant from the bearing this will cause big problems if you dont fix it.
\
Well is there a reason that the knocking only occurs in the rain? I have already placed the stock airbox back and it still makes the knocking in the rain.
imported_kubu is offline  
Old 08-Oct-2005, 11:56 PM
  #7  
Registered User
 
Join Date: Oct 2004
Location: Milton
Posts: 439
I don't think piston slap has anything to with this.
Maybe you have your terminology wrong or something.
If it were to be piston slap you'd hear it either all the time (if it were real excessive) or more so when the engine is cold and the pistons have contracted and are smaller than the bore. It's also a pretty distinct sound too. Almost like a thin metal clanking sound.
sohcnotec is offline  
Old 09-Oct-2005, 12:02 AM
  #8  
Senior Member
 
imported2nv's Avatar
 
Join Date: Jan 2004
Posts: 3,145
i do not have my termino;igys wrong piston slap can be found at the top of the piston or at the bear cap and is normal to high mileage motors.
although i did nort relize it was only in the rain.
maybe your only hearing it in the rain but it is always there.
how many km's on the motor?
where do you live?
imported2nv is offline  
Old 09-Oct-2005, 12:03 AM
  #9  
Senior Member
 
imported2nv's Avatar
 
Join Date: Jan 2004
Posts: 3,145
you may just have something loose aswell.
imported2nv is offline  
Old 09-Oct-2005, 12:05 AM
  #10  
Registered User
Thread Starter
 
imported_kubu's Avatar
 
Join Date: Aug 2004
Location: Hamilton
Posts: 103
I'm 99.99% sure that its only in the rain. Its a very loud knocking sound that is as loud as the radio. I don't hear anything when its not raining. I have 43xxx km on engine. I'm in Hamilton and willing to drive distances if anyone can help me
imported_kubu is offline  
Old 12-Oct-2005, 09:28 PM
  #11  
Registered User
Thread Starter
 
imported_kubu's Avatar
 
Join Date: Aug 2004
Location: Hamilton
Posts: 103
Any other input would be appreciated as well.
imported_kubu is offline  
Old 12-Oct-2005, 09:33 PM
  #12  
Senior Member
 
Join Date: Mar 2005
Posts: 6,176
Originally posted by kubu
Any other input would be appreciated as well.
if it's under warranty just go back to the dealership.
chris_si98 is offline  
Old 14-Oct-2005, 04:49 PM
  #13  
Registered User
 
Join Date: Feb 2005
Posts: 18
piston slap is from excessive clearance between the piston skirt and the cylinder wall, noise from the bearing cap is called rod knock... very very different sounds... and usually very different occuring times, piston slap usually on cold starts, rod knock under load when its hot and the oil is thinned, as well sometime when cold and starting without any oil in the bearing surfaces.

how does a CAI void your warrenty? At toyota dealerships you can buy TRD cold air intakes included in the financing of your car that are fully supported by warrenty, so unless your honda has magical properties that the cold air intake allow to escape (i'm being very sarcastic here) the dealership ought to still cover anything, however if the damage was found to be caused by an aftermarket part, then it would void, so providing you don't go in there saying "i sucked water in my aftermarket intake and now it knocks" and instead say something like "My car has an unusual noise coming from the engine, almost like a knocking sound that is more prominent during rain" it would look a lot better on you.

hope i've been a lil helpful, tried to be at least
Bond CR250 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jj2ii3344
Honda Civic Performance - JDM Discussion
9
04-Apr-2008 11:46 PM
imported_White_Sleeper
Honda Civic Performance - JDM Discussion
13
21-Mar-2007 09:05 PM
imported_GoldBadge
Honda Civic Performance - JDM Discussion
5
15-Feb-2005 11:35 AM
imported_DT80
Honda Civic Performance - JDM Discussion
23
08-Jun-2004 12:00 PM
imported_audiophilia
CFz Discussion
51
23-Sep-2002 10:41 PM


Thread Tools
Search this Thread
Quick Reply: engine knocking in the rain


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.