Ok about beginning/towards middle of summer i bent a valve when i mishifted at the track and had the head redone basically stock - except dpr dual valve springs, 00si retainers - just didnt have the money at the time to upgrade.

Nothing has been the matter for the past few months its been running. But ever since it hit 22 degrees. I notice rod knock for not even 2 seconds when i start the car. Then it dissapears immediatly and I never hear it again. Of course its hard to hear it going 70 mph but i try to listen as much as possible and I dont believe there is a knock.

Its only when its been cold out. And when the motor has been sitting for over 6 hours.

Never did this before. I havent redlined or mishifted or non of that crap. But there is the possibility I created stress on the bearing from that mishift in summer ? and why would it only be affected in the winter...

I will be posting up a video possibly tuesday night cuz im a overlyworried teg owner hehe.

Any insight would be great on the present situation.

 

are you sure its a rod knock and not a ticking noise, such as a valve?

 

I know what valve tap sounds like ... trust me hehe.

Its not injectors either even though they click.

Its not chattery like valve tap and loud injectors. Its clear rod knock. Its got that knock sound lol - i will post on tuesday.

Also its not pinging either.

 

looks like you have a nice little job on your hands
no more mis-shifting

 

i think rod knock would worsen as its driven and gotten louder within a few days. if its been past this time already, chances are its somethign else. you'd notice after driving around 3-4 days if it was rod-knock or not, especially after some highway use.

 

Its been like this for a week/ couple weeks - hasnt gotten worse, its actually lessened. But still there

 

I don't think you can have rod knock a startup only. At startup, the oil pressure is higher than when the enging is warm. The more oil pressure, the more stable the rod is.

Are you sure your not hearing piston slap? Are you burning alot of oil?

Piston to valve contact does put high loads on the bearing and rods themselves. Maybe you slightly bent a rod and has caused the piston rings to wear down, inceasing the cylinder wall clearance and is why your hearing piston slap at idle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mac8008 &raquo;</TD></TR><TR><TD CLASS="quote"> Are you burning alot of oil? </TD></TR></TABLE>

An abnormally higher amount.

I mean i changed the oil not even 2 weeks ago with mobil 1 5w30 synthetic

And it was right at the lowest dot. But i heard from the top dot to the low dot is only one quart.

 

I suggest that you do a leakdown test and see if you find a cyl with high leakage. If that's the case, next time you start the engine pull the plug wire and see if the noise goes away. See what I'm getting at?

Next, you can narrow the problem further down by checking the oil pressure.

 

I see what your saying - I understand the knock will still continue very shortly after i shut off the car.

Also - I have extended warranty on my car but i also have FPR and VAFC .. now i can get the vafc out and off - but i dont know what todo about the FPR

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chemicalviper &raquo;</TD></TR><TR><TD CLASS="quote">Ok about beginning/towards middle of summer i bent a valve when i mishifted at the track and had the head redone basically stock - except dpr dual valve springs, 00si retainers - just didnt have the money at the time to upgrade.
</TD></TR></TABLE>

you mean bent 7 valves?

 

lifter tick possibly. exhaust leaks can make a knock sound until the car warms up. If it were a rod I would guess your oil pressure would be very low, and you'd run pretty hot. friends trans am had this problem. It was his flywheel.

 

Uhh chris i never wrote that. Somone at B's is doing that. I try not to be a dick like that

 

piston slap

its actually pretty common on honda engines from what I have seen.

Something along the lines of when the engine is cold, the worn piston rings allow the piston to slap around in the cylinder slightly causing that clacking noise. When it warms up, everything expands and the pistons are held snug again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StyleTEG &raquo;</TD></TR><TR><TD CLASS="quote">piston slap

its actually pretty common on honda engines from what I have seen.

Something along the lines of when the engine is cold, the worn piston rings allow the piston to slap around in the cylinder slightly causing that clacking noise. When it warms up, everything expands and the pistons are held snug again.</TD></TR></TABLE>

Sounds exactly right from what ive researched