Hi all,
I have recently started to have issues with my 347 hydraulic roller cam motor giving a constant miss fire at idle and which continually worsens as revs rise.
Nothing has changed in terms of ECU mapping and after checking all the basics (fuel, spark and compression check) have put it down to a valve not operating properly. I have noted recently - but before the current events - that the upper rev range the motor has been a bit "Fluffy"
I have arranged for the engine builder to go through and check all the valve springs, seals, etc, some time next week with luck.
In the mean time I pulled the rocker covers today and found a nice groove ground around the push rods.
Now I am not the brightest or smartest when it comes to engines but thought this just cant be right so, I pulled a couple of push rods to have a look and guess what...... a lovely reduction in pushrod diameter by about 1.5mm on all push rods! Obviously they have been wearing on the guide plates.
Is this normal wear for hardened pushrods given the motor is only 3000km old, albeit pretty hard km's over the last 4 years.
What causes this kind of drastic wear? Look forward to some interesting comments.
I have recently started to have issues with my 347 hydraulic roller cam motor giving a constant miss fire at idle and which continually worsens as revs rise.
Nothing has changed in terms of ECU mapping and after checking all the basics (fuel, spark and compression check) have put it down to a valve not operating properly. I have noted recently - but before the current events - that the upper rev range the motor has been a bit "Fluffy"
I have arranged for the engine builder to go through and check all the valve springs, seals, etc, some time next week with luck.
In the mean time I pulled the rocker covers today and found a nice groove ground around the push rods.
Now I am not the brightest or smartest when it comes to engines but thought this just cant be right so, I pulled a couple of push rods to have a look and guess what...... a lovely reduction in pushrod diameter by about 1.5mm on all push rods! Obviously they have been wearing on the guide plates.
Is this normal wear for hardened pushrods given the motor is only 3000km old, albeit pretty hard km's over the last 4 years.
What causes this kind of drastic wear? Look forward to some interesting comments.