Bit of a long story but here goes. I have a 96 Cobra. Motor is stock except for IMRC deletes, 60# injectors and a Vortech V3. Almost 2 years ago the car overheated about month after I bought it and blew the head gaskets. I had the heads checked and shaved I believe is was .009" straight and put new gaskets and put motor back together. Since day one it has had a ticking. Thought maybe it was from an exhaust leak. Fixed that and still ticked. Used a stethescope and heard ticking from passenger side rear valve cover. replaced rockers and lifters. Ticking in cover gone but same tick was still heard when running. Put on a friends lift and again with a stethescope heard a loud ticking in bellhousing only. Removed trans and found friction clutch with 2 broken rivets and one rivet wedged between plate. Replaced clutch, flywheel, throwout and pilot bearing. Reinstalled, tick in tranny gone but original tick still there. Brought to 3 different shops and they cant find it. One shop replaced all the lifters on drivers said and some rockers saying old lifters were not pumping up and bad. Still ticks. One thing shops had in common was the said its coming from driver side rear of head/cylinder. You can hear it most behind the front driver wheel. I have taken this car to dyno days, dragstrip, across the state and beat on it and it will not break for over 12k miles now.
Now for when you hear the noise.....You hear it at idle and every once in a while it completely disappears at idle and that maybe once a month and same thing when driving for a mile or 2 in traffic. When you put a load on the car, whether stopped and holding the brake like your gonna do a burnout, the noise goes away 100%. When you accelerate, hard or easy it goes away. You also hear when cruising and slow down just a little then try and hold your speed when you barely touch the gas. When you rev it in neutral it goes away but starts ticking as the rpms come back down close to idle like at 2k and under.
Only thing I can think of after doing some digging is a wristpin. I have not taken if apart cause I dont want to rip into it and not find the problem. I have heard wristpin noise can last years and never have a problem but not sure of it.
I have been a motorcycle tech for over 8 years and built plenty of sportbike motors and which these motors are similar just 2 sportbike motors back to back some car engines for myself and I understand all the dohc crap and tensioners etc but never have I heard of wristpin ticking. Whats everyones thoughts?
I swear this car is sponsored by Timex, "Takes a licking and keeps on ticking!"
Now for when you hear the noise.....You hear it at idle and every once in a while it completely disappears at idle and that maybe once a month and same thing when driving for a mile or 2 in traffic. When you put a load on the car, whether stopped and holding the brake like your gonna do a burnout, the noise goes away 100%. When you accelerate, hard or easy it goes away. You also hear when cruising and slow down just a little then try and hold your speed when you barely touch the gas. When you rev it in neutral it goes away but starts ticking as the rpms come back down close to idle like at 2k and under.
Only thing I can think of after doing some digging is a wristpin. I have not taken if apart cause I dont want to rip into it and not find the problem. I have heard wristpin noise can last years and never have a problem but not sure of it.
I have been a motorcycle tech for over 8 years and built plenty of sportbike motors and which these motors are similar just 2 sportbike motors back to back some car engines for myself and I understand all the dohc crap and tensioners etc but never have I heard of wristpin ticking. Whats everyones thoughts?
I swear this car is sponsored by Timex, "Takes a licking and keeps on ticking!"
