Did phaser & tensioner fix. Now runs bad
10-22-2014, 12:15 AM
#11
Junior Member
Thread Starter
Join Date: Oct 2014
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Some additional info on this Problem: When I replaced phasers, did not remove any rockers. When removed right tensioner & chain, sprocket snapped backward from spring pressure on cam lobes. Had to move it forward about 30 degrees to get back in time. Cylinder 1 at top, thus cam lobes away from cam. Others cylinders on right bank at mid or bottom stroke. So, think & Hope valve / piston crash did not happen. But can this backward cam rotation dislocate rockers when lobes hit in backward direction?
Did comp test . First 3 at 150, last 5 were 125 to 135. On Last 4 cylinders, battery was getting tired & cylinders gassey. Gauge lets some pressure bleed out. So, not accurate, but not disastrously low. Engine does not burn oil.
Has anyone else had experience with this cam movement happening when doing the tensioner & phaser fix ? Cause any problems?
Did comp test . First 3 at 150, last 5 were 125 to 135. On Last 4 cylinders, battery was getting tired & cylinders gassey. Gauge lets some pressure bleed out. So, not accurate, but not disastrously low. Engine does not burn oil.
Has anyone else had experience with this cam movement happening when doing the tensioner & phaser fix ? Cause any problems?
10-22-2014, 12:27 PM
#13
Senior Member
Yes, my left cam moved on me and luckily I had marked it, I used vice grips and put it back in place. Not that big of a thing really to move it back, I did not have any followers come off the lash adjusters because of the movement either.
Tom
Tom
10-22-2014, 03:02 PM
#14
Junior Member
Thread Starter
Join Date: Oct 2014
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
No vise grip holding cam. The cam snapped back when I removed the tensioner to get chain off. Sprocket was still on cam, so I rotated it back,& it stayed put. Used sproc holding tool to remove / install new phaser, then lined up timing marks on all sprox / chain.
10-22-2014, 06:27 PM
#15
Senior Member
If you are concerned with piston valve contact, rotate the engine by using a socket on the crank bolt to see if there is an contact being made. you will know if there is, it will get really hard to turn or wont turn at all. Make sure that you rotate if enough of times to go thru the entire range of operation. Let us know what you find out.
tom
tom
10-23-2014, 10:45 PM
#16
Junior Member
Thread Starter
Join Date: Oct 2014
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Bought a little code reader & plugged in. Says 0351 - coil A primary or secondary circuit. Does this definitely mean bad coil? (which one of bank A?)
Other monitor messages: Catalyst, EVAP, o2 sensor, o2 htr, misfire, fuel. I now question: Is coil / misfire the cause of the catalyst and O2 component reading?
At low RPM when the engine is misfiring & shaking, I hear a squeaky noise thru the firewall, about where the EVAP valve is. Do these go bad & cause a vac leak?
Other monitor messages: Catalyst, EVAP, o2 sensor, o2 htr, misfire, fuel. I now question: Is coil / misfire the cause of the catalyst and O2 component reading?
At low RPM when the engine is misfiring & shaking, I hear a squeaky noise thru the firewall, about where the EVAP valve is. Do these go bad & cause a vac leak?