- Apr 9, 2018
- 5
- 0
- 1
Hello everyone. I have a 1986 mustang. I built the 308 myslef. Everything is new....block is used but was sent to machine shop. It has ticked/tapped since I first started it. I have Trick Flow 170 heads with upgraded valve springs rated for .600 lift. TF stage 2 cam (.542-.563 lift), melling hydraulic roller lifters., TF 1.6 (3/8) stud mounted rocker, trick flow 6.75 chromoly pushrods, trick flow track heat intake (black) and lower, 75mm Trickflow throttle body and Trick Flow black valve covers (tall).
I know its a lot of Trick flow. But i have been over everything. I replaced the lifters to melling...i did NOT soak them overnight or put them in a coffee can of oil. To soak or not is a matter of opinion and no one seems to agree on this just like the "zero" lash subject. I did soak the first set of lifters in lucas before dropping them in, but i decided not to soak the second set since it had ticked the first time. This engine has less than 1 hour of running time.. The first set of lifters were Ford OEM replacements. My valvetrain geometry is correct... the center of the rocker roller sits in the middle of the spring, the spring mark left by the rocker is less than or at .050 in the dead center. Pushrod length is correct 6.75 and the 1.6 roller rockers are NOT hitting the spring underneath the rocker. These are Stud Mounted. I have set zero Lash half a turn past "zero". Up and down on the pushrod till no Lash and lock down the hex nut. I have set valve lash damn near 13 times now, adjusting it all kinds of ways. Twist pushrod, lift and twist...you name it and ive tried it.
I settled with the EOIC method with the up and down lash. I checked for exhaust leaks and cannot find any. The pushrods are as straight as a conservstive at a gun rally. The PVC (piston to valve clearances) are good.
Basically anything I could try I've tried and I still cannot find the cause of this tapping mess... I have a video I will post as soon as I'm able to upload.
I was thinking maybe a fuel injector but i listened with a hose all around my engine...and nothing. It sounds like its coming from the cemter of the upper intake. I have read that Trick Flow has a certain "Sewing Machine on Crack" sound. I can hear that sound...but this isnt that sound. I also thought it was the guideplates and it isn't....can someone please help...
I know its a lot of Trick flow. But i have been over everything. I replaced the lifters to melling...i did NOT soak them overnight or put them in a coffee can of oil. To soak or not is a matter of opinion and no one seems to agree on this just like the "zero" lash subject. I did soak the first set of lifters in lucas before dropping them in, but i decided not to soak the second set since it had ticked the first time. This engine has less than 1 hour of running time.. The first set of lifters were Ford OEM replacements. My valvetrain geometry is correct... the center of the rocker roller sits in the middle of the spring, the spring mark left by the rocker is less than or at .050 in the dead center. Pushrod length is correct 6.75 and the 1.6 roller rockers are NOT hitting the spring underneath the rocker. These are Stud Mounted. I have set zero Lash half a turn past "zero". Up and down on the pushrod till no Lash and lock down the hex nut. I have set valve lash damn near 13 times now, adjusting it all kinds of ways. Twist pushrod, lift and twist...you name it and ive tried it.
I settled with the EOIC method with the up and down lash. I checked for exhaust leaks and cannot find any. The pushrods are as straight as a conservstive at a gun rally. The PVC (piston to valve clearances) are good.
Basically anything I could try I've tried and I still cannot find the cause of this tapping mess... I have a video I will post as soon as I'm able to upload.
I was thinking maybe a fuel injector but i listened with a hose all around my engine...and nothing. It sounds like its coming from the cemter of the upper intake. I have read that Trick Flow has a certain "Sewing Machine on Crack" sound. I can hear that sound...but this isnt that sound. I also thought it was the guideplates and it isn't....can someone please help...