Installing M8 Cam Plate
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Road Warrior
Joined: May 2007
Posts: 1,434
Likes: 384
From: Arkansastan
Installing M8 Cam Plate
I've been watching different videos and instructions on installing cams and ran a across a difference in how cam plates are installed. In many videos, the cam is installed, the oil pump is installed, then the cam plate, then the bolts, then torqued down per the manual. Others (like feuling), show taking the cam, and pump, installing it into the cam plate, holding the pump in with the four bolts lightly, then installing it as an assembly into the engine, installing the remaining bolts, then torquing from there. So is there a real difference in the end result in these two methods? Is one "better" than the other? Is there a reason why its done in these two different ways? or does it really matter? Just ran across the two different methods and got me curious about the 'whys' of each.
Cruiser
Joined: Sep 2021
Posts: 194
Likes: 129
From: Washington
Oil pump installed first to check clearance to make sure its seated properly into the O ring and flush.
Important step, checking pinion shaft runout, most require .005 or less.
Last edited by GmanHawaii; Apr 23, 2023 at 03:57 PM.
Road Master
Joined: Nov 2022
Posts: 802
Likes: 394
From: Missouri
chain alignment of the gears also...
you know ot install everything lightly and spin to align,
torque pump, cam plate, install gears to 15 lb/ft...check gear alignment, if with in .009", your good, otherwise shim to correct.
then torque gears in the proper steps
you know ot install everything lightly and spin to align,
torque pump, cam plate, install gears to 15 lb/ft...check gear alignment, if with in .009", your good, otherwise shim to correct.
then torque gears in the proper steps
HDF Community Team
Joined: Oct 2018
Posts: 4,347
Likes: 3,392
From: Seattle
The Logic is simple.
1. CamPlate is touch/snugged first so that it will stay in position once positioned.
2. Engine is Rotated to center the cam plate on the pinion shaft.
3. CamPlate is Tightened down for final Torque.
4. (1 and 2) Oil Pump Bolts are touch snugged.
5. Engine is Rotated, Oil pump bolts are all final torqued.
This 1. Centers the Camplate separate of the Oilpump and influences so that the plate is centered, But the Oil pump is free to move around as it needs to so that 2. The Oil Pump can be centered as much as it can be.
You dont want the CamPate and Pump Torqued down together because then one or the other will have a tight spot that will wear. Tightening them down separately lets everything find it's center on it's own, reducing tight spots through out the system.
I know Feuling's system says to install the pump on to the plate then install it, but I just don't agree with this because it doesn't let the oil pump center itself independently of the CamPlate.
This is the sequence I used, derived from all of the pump install videos and instruction sheets from HD, S&S, and Fueling.
1. CamPlate is touch/snugged first so that it will stay in position once positioned.
2. Engine is Rotated to center the cam plate on the pinion shaft.
3. CamPlate is Tightened down for final Torque.
4. (1 and 2) Oil Pump Bolts are touch snugged.
5. Engine is Rotated, Oil pump bolts are all final torqued.
This 1. Centers the Camplate separate of the Oilpump and influences so that the plate is centered, But the Oil pump is free to move around as it needs to so that 2. The Oil Pump can be centered as much as it can be.
You dont want the CamPate and Pump Torqued down together because then one or the other will have a tight spot that will wear. Tightening them down separately lets everything find it's center on it's own, reducing tight spots through out the system.
I know Feuling's system says to install the pump on to the plate then install it, but I just don't agree with this because it doesn't let the oil pump center itself independently of the CamPlate.
This is the sequence I used, derived from all of the pump install videos and instruction sheets from HD, S&S, and Fueling.
M8 Oil Pump Install Sequence (Drill Step can be replaced with torque wrench and torque settings)
Touch Snug the bolts in sequence.(Hand Tool)
Rotate the Crank Shaft.
Drill Snug the Cam Plate (3 to 8) (Drill Clutch Setting 1, approx. 3~5ft lbs.)
Rotate the Crank Shaft, several times.
100inch pound Torque The Cam Plate
Rotate the Crank Shaft
Drill Snug the Oil Pump(except 9 and 10)
Rotate the Crank Shaft.
100inch pound Torque the Oil Pump.
Rotate the Crank Shaft
Wait.(15min)
110inch pound final Torque full sequence 1 to 10.
Touch Snug the bolts in sequence.(Hand Tool)
Rotate the Crank Shaft.
Drill Snug the Cam Plate (3 to 8) (Drill Clutch Setting 1, approx. 3~5ft lbs.)
Rotate the Crank Shaft, several times.
100inch pound Torque The Cam Plate
Rotate the Crank Shaft
Drill Snug the Oil Pump(except 9 and 10)
Rotate the Crank Shaft.
100inch pound Torque the Oil Pump.
Rotate the Crank Shaft
Wait.(15min)
110inch pound final Torque full sequence 1 to 10.
Last edited by FranBunnyFFXII; Apr 23, 2023 at 06:55 PM.
Thread Starter
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Road Warrior
Joined: May 2007
Posts: 1,434
Likes: 384
From: Arkansastan
The Logic is simple.
1. CamPlate is touch/snugged first so that it will stay in position once positioned.
2. Engine is Rotated to center the cam plate on the pinion shaft.
3. CamPlate is Tightened down for final Torque.
4. (1 and 2) Oil Pump Bolts are touch snugged.
5. Engine is Rotated, Oil pump bolts are all final torqued.
This 1. Centers the Camplate separate of the Oilpump and influences so that the plate is centered, But the Oil pump is free to move around as it needs to so that 2. The Oil Pump can be centered as much as it can be.
You dont want the CamPate and Pump Torqued down together because then one or the other will have a tight spot that will wear. Tightening them down separately lets everything find it's center on it's own, reducing tight spots through out the system.
I know Feuling's system says to install the pump on to the plate then install it, but I just don't agree with this because it doesn't let the oil pump center itself independently of the CamPlate.
This is the sequence I used, derived from all of the pump install videos and instruction sheets from HD, S&S, and Fueling.
1. CamPlate is touch/snugged first so that it will stay in position once positioned.
2. Engine is Rotated to center the cam plate on the pinion shaft.
3. CamPlate is Tightened down for final Torque.
4. (1 and 2) Oil Pump Bolts are touch snugged.
5. Engine is Rotated, Oil pump bolts are all final torqued.
This 1. Centers the Camplate separate of the Oilpump and influences so that the plate is centered, But the Oil pump is free to move around as it needs to so that 2. The Oil Pump can be centered as much as it can be.
You dont want the CamPate and Pump Torqued down together because then one or the other will have a tight spot that will wear. Tightening them down separately lets everything find it's center on it's own, reducing tight spots through out the system.
I know Feuling's system says to install the pump on to the plate then install it, but I just don't agree with this because it doesn't let the oil pump center itself independently of the CamPlate.
This is the sequence I used, derived from all of the pump install videos and instruction sheets from HD, S&S, and Fueling.
Stellar HDF Member
Joined: Mar 2012
Posts: 2,019
Likes: 599
From: Columbus, OH
I like installing the pump first so I can feel the housing slide in the O-Ring, seen way too many threads around here where the O-Ring gets damaged trying to install pump and plate together
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