4.0 cam synchronizer
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Tuned
Joined: May 2004
Posts: 334
Likes: 4
4.0 cam synchronizer
Replacing the cam synchro on my 2000 Ranger.. The new part I received has up and down shaft movement of around .050 , the old one has very little movement at all. Is there a limit to the up and down shaft movement. I see there are shims under the gear. Thanks
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Joined: Jan 2004
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From: SW Va
58 reads but no replies yet, so will see if I can get things started. Is the replacement part OEM New, or Reman OEM, or Aftermarket New or Aftermarket Reman???
It's been a loooong time but if I remember right, I think the sync shaft assy is supposed to have a Thrust Washer to properly work load the assy, after its lubricated & clamped into position.
So maybe the replacement part assy is damaged, thrust washer flattened, missing or otherwise mucked up??? Some initial thoughts for consideration, let us know what you conclude & how it goes.
It's been a loooong time but if I remember right, I think the sync shaft assy is supposed to have a Thrust Washer to properly work load the assy, after its lubricated & clamped into position.
So maybe the replacement part assy is damaged, thrust washer flattened, missing or otherwise mucked up??? Some initial thoughts for consideration, let us know what you conclude & how it goes.
Thread Starter
|
Tuned
Joined: May 2004
Posts: 334
Likes: 4
58 reads but no replies yet, so will see if I can get things started. Is the replacement part OEM New, or Reman OEM, or Aftermarket New or Aftermarket Reman???
It's been a loooong time but if I remember right, I think the sync shaft assy is supposed to have a Thrust Washer to properly work load the assy, after its lubricated & clamped into position.
So maybe the replacement part assy is damaged, thrust washer flattened, missing or otherwise mucked up??? Some initial thoughts for consideration, let us know what you conclude & how it goes.
It's been a loooong time but if I remember right, I think the sync shaft assy is supposed to have a Thrust Washer to properly work load the assy, after its lubricated & clamped into position.
So maybe the replacement part assy is damaged, thrust washer flattened, missing or otherwise mucked up??? Some initial thoughts for consideration, let us know what you conclude & how it goes.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Ok good feedback, that preload endplay sounds right. Don't forget to soak the gear/bearing end in engine oil just before installing, so to get it off to a good start, as it only gets oil misting lubrication, so it would take a while for a new part to get a lube job put on it if not first given a good oil soaking!!!
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Thread Starter
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Tuned
Joined: May 2004
Posts: 334
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Ok good feedback, that preload endplay sounds right. Don't forget to soak the gear/bearing end in engine oil just before installing, so to get it off to a good start, as it only gets oil misting lubrication, so it would take a while for a new part to get a lube job put on it if not first given a good oil soaking!!!
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Thread Starter
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Tuned
Joined: May 2004
Posts: 334
Likes: 4
So, I am confused about the articles I am reading as far as installation of the cam synchronizer. I am treating this just like a distributor as far as removal and installation. Marking and reinstalling in the same position. However, the sensor on my engine is pointing straight back to the firewall. I centered the tab, TDC, and plan on installing the new one in the same position. All the articles state to have the synchronizer at 15 or so degrees off center. Why would I offset the new one, when the original wasn't offset? Thanks for any info/input. Tommy
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Joined: Jan 2004
Posts: 13,851
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From: SW Va
Maybe the assy in the past has been removed & reinstalled by someone that didn't pay close enough attention to the necessary details???
#1 piston / passenger side front, @ TDC on the Compression stroke. Then the pre-lubed 4.0L cam sync assy is installed at a Seated ccw, (toward the passenger side) 60 deg angle to the engine center line, using a sync alignment tool.
EDIT: We have to start the installation a little off center so as the sync gear teeth engage, the shaft will rotate & line up at the specified angle when fully seated & ready to be clamped in place.
#1 piston / passenger side front, @ TDC on the Compression stroke. Then the pre-lubed 4.0L cam sync assy is installed at a Seated ccw, (toward the passenger side) 60 deg angle to the engine center line, using a sync alignment tool.
EDIT: We have to start the installation a little off center so as the sync gear teeth engage, the shaft will rotate & line up at the specified angle when fully seated & ready to be clamped in place.
Thread Starter
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Tuned
Joined: May 2004
Posts: 334
Likes: 4
Maybe the assy in the past has been removed & reinstalled by someone that didn't pay close enough attention to the necessary details???
#1 piston / passenger side front, @ TDC on the Compression stroke. Then the pre-lubed 4.0L cam sync assy is installed at a Seated ccw, (toward the passenger side) 60 deg angle to the engine center line, using a sync alignment tool.
EDIT: We have to start the installation a little off center so as the sync gear teeth engage, the shaft will rotate & line up at the specified angle when fully seated & ready to be clamped in place.
#1 piston / passenger side front, @ TDC on the Compression stroke. Then the pre-lubed 4.0L cam sync assy is installed at a Seated ccw, (toward the passenger side) 60 deg angle to the engine center line, using a sync alignment tool.
EDIT: We have to start the installation a little off center so as the sync gear teeth engage, the shaft will rotate & line up at the specified angle when fully seated & ready to be clamped in place.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Ok I agree, if you're the original owner & know its OEM factory installed & never been out & has been ok, put that new replacement puppy back it there just like the OEM one came out & let us know how it goes
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Tuned
Joined: May 2004
Posts: 334
Likes: 4
Update FYI..All is back together and running great. I don't know if there are performance factors that are effected and not noticeable with the way my cam sync is installed, but general driving is just fine. Thanks and good night.
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Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Good feedback & great to hear it seems to be performing fine.
This is the First 4.0L cam sync assy & sensor replacement I can remember since posting on this board.
We all have likely heard about the 3.0 L Vulcan dry cam sync bearing protest squeak warning, atop the engine, passenger side, back by the firewall. So, might be helpful to share with the forum what happened to cause it to need to be replaced??? I have one of these pushrod 4.0L puppies thats just turned 100K miles, so am keen to hear what happened so I can be on the lookout too, if need be.
This is the First 4.0L cam sync assy & sensor replacement I can remember since posting on this board.
We all have likely heard about the 3.0 L Vulcan dry cam sync bearing protest squeak warning, atop the engine, passenger side, back by the firewall. So, might be helpful to share with the forum what happened to cause it to need to be replaced??? I have one of these pushrod 4.0L puppies thats just turned 100K miles, so am keen to hear what happened so I can be on the lookout too, if need be.
Thread Starter
|
Tuned
Joined: May 2004
Posts: 334
Likes: 4
Good feedback & great to hear it seems to be performing fine.
This is the First 4.0L cam sync assy & sensor replacement I can remember since posting on this board.
We all have likely heard about the 3.0 L Vulcan dry cam sync bearing protest squeak warning, atop the engine, passenger side, back by the firewall. So, might be helpful to share with the forum what happened to cause it to need to be replaced??? I have one of these pushrod 4.0L puppies thats just turned 100K miles, so am keen to hear what happened so I can be on the lookout too, if need be.
This is the First 4.0L cam sync assy & sensor replacement I can remember since posting on this board.
We all have likely heard about the 3.0 L Vulcan dry cam sync bearing protest squeak warning, atop the engine, passenger side, back by the firewall. So, might be helpful to share with the forum what happened to cause it to need to be replaced??? I have one of these pushrod 4.0L puppies thats just turned 100K miles, so am keen to hear what happened so I can be on the lookout too, if need be.