matthon
Well-Known Member
383, aluminum heads, 4 speed, Schumacher headers.
Engine was done in 2012 by a local machine shop, dyno'd, and has been without issue.
I changed the collector gaskets recently as one failed before this tick. I used a straight file on both sides and a little copper spray.
Ticking started a few weeks after I replaced gaskets, but sounded different.
No leaks at collector or heads, no signs of a leak on either side, no air flow felt anywhere.
Can hear it on driver's side, sounds like it's coming from valve cover, but can also hear it under car.
I can hear it when I open the door and look down.
Went around to the passenger side, I could faintly hear it in the front wheel well.
A mechanic friend listened to it running, told me to bring each cylinder to tdc and push down on the rockers/lifters.
If there was a bad lifter, or lobe, I would be able to push down fairly easily, or the pushrod would be loose.
No can do.
Did this to both sides.
Pushrods spin at tdc, no signs of being bent.
I don't see any wear on the spacers between the rockers, or on the brackets under the shaft bolts.
There does seem to be more side to side movement on #7, which is in the area of the ticking.
It has great oil pressure and all the rockers have oil on them when I pull the cover.
Pulled the trans inspection cover, pressure plate bolts all tight, clutch, bearing, fork, flywheel all look fine. Ran it, tick isn't any louder, spinning true.
Pulled rockers/shaft on driver's side. I don't see anything that stands out. Looks like normal wear, don't see any cracks.
Shaft looks fine.
Pulled pushrods, all look fine, no interference, none bent.
Valves/springs look fine.
Of course, I am not familiar with what everything should look like with normal use, but nothing slapping me in the face.
Took fan belt off, water pump and alternator spin freely without issue.
I thought for sure I'd be swapping a lifter or pushrod, now I'm stumped.
Any input is appreciated.
Engine was done in 2012 by a local machine shop, dyno'd, and has been without issue.
I changed the collector gaskets recently as one failed before this tick. I used a straight file on both sides and a little copper spray.
Ticking started a few weeks after I replaced gaskets, but sounded different.
No leaks at collector or heads, no signs of a leak on either side, no air flow felt anywhere.
Can hear it on driver's side, sounds like it's coming from valve cover, but can also hear it under car.
I can hear it when I open the door and look down.
Went around to the passenger side, I could faintly hear it in the front wheel well.
A mechanic friend listened to it running, told me to bring each cylinder to tdc and push down on the rockers/lifters.
If there was a bad lifter, or lobe, I would be able to push down fairly easily, or the pushrod would be loose.
No can do.
Did this to both sides.
Pushrods spin at tdc, no signs of being bent.
I don't see any wear on the spacers between the rockers, or on the brackets under the shaft bolts.
There does seem to be more side to side movement on #7, which is in the area of the ticking.
It has great oil pressure and all the rockers have oil on them when I pull the cover.
Pulled the trans inspection cover, pressure plate bolts all tight, clutch, bearing, fork, flywheel all look fine. Ran it, tick isn't any louder, spinning true.
Pulled rockers/shaft on driver's side. I don't see anything that stands out. Looks like normal wear, don't see any cracks.
Shaft looks fine.
Pulled pushrods, all look fine, no interference, none bent.
Valves/springs look fine.
Of course, I am not familiar with what everything should look like with normal use, but nothing slapping me in the face.
Took fan belt off, water pump and alternator spin freely without issue.
I thought for sure I'd be swapping a lifter or pushrod, now I'm stumped.
Any input is appreciated.