I need to know what makes an engine knock . I can hear an engine knock upon start up .

I only hear the knock when the engine is fully warmed up , the knock has become more audible ....it does not knock any other time ..only on start up ....

other wise the car drives like normal ....but gas milage has not been so great

i just got the car back from Acura because the check engine light was on , and they replaved the distributor .

what conditions result in an engine knock ....

even after duplicating the noise the dealer insisted it is normal ...first he said its the starter disconnecting from the flywheel ....insisting that the starter is under the intake manifold .....

then he kept insisting that the noise could just be the Vtec kicking in .....

this dealer has been giving me the run around ...and keeps insisting that everything is normal ....

they just seem to not want to touch it ...i dont know what else to do ...

is there anybody in the dallas area that knows a good Honda-Tech that is reasonable

i'm tired of dealing with these guys at Goodson Acura ....they are practically salesman ...they dont even touch the damn cars ....and barely know anything about them ....

 

TTT ...please guys ....i need some help

 

Maybe the timing is advanced too far since the new distributor is installed. Let them check the ignition timing....

 

they just checked the ignition timing ..they said it was way off ....do you know the stock setting for the ignition timing by any chance

 

So, I'm right? It should be between 14 and 18 deg. 18 deg is optimal within specs...

 

Does it knock at all when you rev it up to about 2500? When I spun my bearings it knocked on start up, then if i reved up to about 2500 it knocked. After getting the short block replaced it now just knocks very slightly on start up and thats it... and its been almost 20k miles like that

 

they said the old distributor was defective ,and the timing was way off ....the new distributor should be set correctly ....but maybe they did it wrong ..its a possibility ...

if the timing was wrong ...wouldnt it ping ..instead of knock ?

what causes a knock .....detonation ? lack of oil ? ???

 

ping = knock = detonation = when the combustion is too early, could be caused by combustion by compression (low octane/high compression) or due to spark ignition (that is too early).




[Modified by DutchITR1689, 6:35 PM 12/10/2002]

 

nope only on start up ....for right now ...i'll check to see if it does when revving to 2500 after i get off work ....but as for now the knock is only heard upon start up with the engine fully warmed up ...

did the dealer remedy the situation ....did they cover it under warranty ?

 

well i have heard what sounded like a knock a long time ago ...but it never really happened more than once ,...and very quiet ..only til recently has it become more audible

 

The B18C5 has a knock sensor. If it detect a knock the ECU will we-todd the ignition timing and gradually advance it back until it knocks again etc...

 

oic ....so is the knock sensor on my ITR not working then ?

 

That's not necessary the right conclusion. It could be that the timing is so far off that the ECU cannot do anything....

 

Doesn't sound like detonation to me. If it were happening, it would be under full load, not at startup.

I think you've either got something loose under the hood that's clanging around or two parts have shifted and are making contact with each other.

If you know a Honda mechanic get him to take the little analyzer machine on a drive with you and watch the knock count. That'll tell you if the car's knocking or not.

 

koo ...i'll have to look into that ......

for now i think i'm gonna have to take it to a smaller dealership ...over in arlington ....the shop is small ...but at least the guys you talk to on the phone actually work on the cars .....

i jus feel liek if something is wrong with the block ...i'm gonna get screwed ...because of the bolt ons ....i jus wish i had the OEM parts ...but i bought the car the way it is ...and the owner didnt have any of the OEM parts

 

maybe it's rod knock?

 

If your car has some bolt ons on the exhuast side, check all your gaskets. There may be a broken gasket underneath there somewhere that rattles when it's cold but seals up when the car gets hot and the exhuast expands. I had a similar problem on my header gasket.

 

i dont think its that .....i routinly check all bolt s , and flanges .....just cause i',m **** like that ....the noise i hear only occurs when the car is fully heated up ....when its cold it starts at fast idle so you cant hear it .....

 

well if ur in alrlington, gimme a call and we can hang out til ur car is serviced.

IM'd u my digits yo

 

thanks for all your help guys ..... i think i'll be taking her to Vandagriff Acura tommorow if time permits ...wish me luck