- Joined
- Nov 4, 2005
My engine failed from timing chain gear teeth falling off, then locking up the oil pump.broke teeth on cam,stoped up engine with debris.took apart engine and installed new cam,lifters,valve springs,cleaned out oil pan,new oil pick up tube,oil pump rebuild....tryed to start ,but no oil pressure...found stoped up oil cooler...duh.
Like a dummy, I back flushed cooler, lots of teeth came out, reconnected and ran the car for a couple of years.this is when knock and rattle developed.Thought like others,bearing failure.
I decided to build my spare engine.new bearings,rings,and machine work done.got rotating assembly done by a local machine shop.used old heads, but cleaned and ported them.new valve steam seals.springs still look and spec like new...lifters checked and cleaned like new.cam good and reused.roller cam button reused.push rods check,cleaned,reused.timing cover and oil pump cleaned and reused.
installed engine and broke in....same dang knock/rattle.
the same sound, in the front of motor....timing cover area.
so heres a list of parts and things ive done to diag the sound;
Brand new timing cover
New oil pump
New double roller setup
New crank sensor
New cam sensor
Checked flex plate
Oil pressure 25psi idle hot...65 at 2000 rpm im park
New rad, not using a oil cooler intil I get a new radiator that has one.
I woundering if cam is bent on end where cam sensor gear is?
roller cam button defective? Allowing cam to "walk"?
Another defective cam sensor?
rattle starts at 2000 rpm, and only there at accelleration of rpms in park.not drove car yet.sounds like timing chain slapping against the cover...no evidence of any clearence issues on old cover.....im stummped
Like a dummy, I back flushed cooler, lots of teeth came out, reconnected and ran the car for a couple of years.this is when knock and rattle developed.Thought like others,bearing failure.
I decided to build my spare engine.new bearings,rings,and machine work done.got rotating assembly done by a local machine shop.used old heads, but cleaned and ported them.new valve steam seals.springs still look and spec like new...lifters checked and cleaned like new.cam good and reused.roller cam button reused.push rods check,cleaned,reused.timing cover and oil pump cleaned and reused.
installed engine and broke in....same dang knock/rattle.
the same sound, in the front of motor....timing cover area.
so heres a list of parts and things ive done to diag the sound;
Brand new timing cover
New oil pump
New double roller setup
New crank sensor
New cam sensor
Checked flex plate
Oil pressure 25psi idle hot...65 at 2000 rpm im park
New rad, not using a oil cooler intil I get a new radiator that has one.
I woundering if cam is bent on end where cam sensor gear is?
roller cam button defective? Allowing cam to "walk"?
Another defective cam sensor?
rattle starts at 2000 rpm, and only there at accelleration of rpms in park.not drove car yet.sounds like timing chain slapping against the cover...no evidence of any clearence issues on old cover.....im stummped
