Car: 1991 Civic DX
Engine: B16A/ Y1 Tranny
ECU: unsure
Distributor: recently (replaced by Honda)
Plugs: less than 10,000k
Alternator: New (replaced by Honda)
T-belt: brand new (replaced by Honda)
Rad: brand new (replaced by Honda)
Oil: replaced less than 1000km's ago


I have had bad LMA's for about 3 months, and just have not had the cash to replace them (sounds like a little tick tick tick tick tick). But I was supposed to do it this week, I finally got some money.

Now, my engine is making this knocking sound all the time (cold or warmed up). It sounds like someone is knocking with their knuckle on the spark plug cover! I could probably take a sound clip, and post it if needed. Sounds like its coming from the top of the motor, and the 'knock' goes with the RPM of the motor as well, and is VERY noticible.

But I really need help... I don't want my little car to die! What could be wrong? I'm no mechanic at all, so I want to have some knowledge before I take it somewhere.


*******************edit***********sound clip added

SOUND CLIP

http://users.electrocity.ca/dru/cold.wav


http://users.electrocity.ca/dru/warm.wav


Modified by The Setup at 1:19 AM 2/23/2005


Modified by The Setup at 1:20 AM 2/23/2005

 

we want a sound clip

 

SOUND CLIP

http://users.electrocity.ca/dru/cold.wav


http://users.electrocity.ca/dru/warm.wav

 

LOL! It's staying parked till i get an answer! I think thats the safest thing to do.

 

not detonation.
doesnt sound like a knock...but could be just the recorder

sounds stupid, but check if you have a leak in the header flange.

did it start doing it right away or..

 

that sounds like a header leak to me check the two round gaskets

 

Theres nothing leaking.

It lierally sounds like its comign from the top of the motor... how could a header leak do that?

 

Could be your valves! What kind of oil are you running?

 

this mite sound dumb too but check ur spark plugs, see if one is loose

 

I had the same problem and all it was, the spark plugs were loose. Sounds lame but true.

 

Check and make sure the spark plugs are torqued, check the clearance for your valves...eg valve lashing.

Get a feeler gauge and check the clearances between the cam lobe and the rocker arms. .006 for the exhaust, and .007 for the intake.

 

i must agree, that sounds like a ignition noise to me. sounds like a wire is loose and grounding to the head (spark plug hole tube) or compression like a loose spark plug.

pull your plug wires, check for soot usually white, that is tell tale evidence of arching.

good luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thatbluecrx &raquo;</TD></TR><TR><TD CLASS="quote">this mite sound dumb too but check ur spark plugs, see if one is loose </TD></TR></TABLE>

LOL! I checked right away.. guess what it was. Spark plug was loose and was hitting the spark club cover.

(btw... sorry for responding like a month later)

 

Take out spark wires and plugs blow off and return tightly problem fixed!!!!!