EV 27 Cam swop. Last call for help.!
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Road Captain
Joined: Nov 2009
Posts: 737
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From: Scotland,UK
EV 27 Cam swop. Last call for help.!
Took the new Andrews EV27 and the original 0406 factory Cams down to a buddy,who has an auto repair shop, to have the gears switched over as per previous advice by Spanners & others in my last thread.
He heated (well heated) the 0406 and couldnt remove the gear even after pressing. He also noticed that the 0406 had a "keyway" for alignment which the Andrews Cam doesnt have.
I have shown pics. of the 2 Cams to illustrate the differences.
Pic.1 shows the keyway on the old Cam (R/H ). The kewyay on it is on the front.
Pic.2 shows the Andrews Cam from the rear where there seems to be a large "keyway"?
I am at my wits end with this Cam changeover and am seriously considering refitting the original 0406 Cam. Any suggestions?
He heated (well heated) the 0406 and couldnt remove the gear even after pressing. He also noticed that the 0406 had a "keyway" for alignment which the Andrews Cam doesnt have.
I have shown pics. of the 2 Cams to illustrate the differences.
Pic.1 shows the keyway on the old Cam (R/H ). The kewyay on it is on the front.
Pic.2 shows the Andrews Cam from the rear where there seems to be a large "keyway"?
I am at my wits end with this Cam changeover and am seriously considering refitting the original 0406 Cam. Any suggestions?
Road Warrior
Joined: Jul 2013
Posts: 1,476
Likes: 5
From: Florida
It was pressed on, it will come off. What type of press? When I just changed mine over, I simply secured the backside of the gear between two blocks of wood and gave the nose of the old cam several decent whacks with a hammer, came right out. Didn't give a flip what it did to the old cam, and it will not hurt the gear whatsoever.
Gotta ask, you were heating the outer area of the gear, and not the cam itself, correct?
Make sure you have alignment marks scribed on the gear in relation to the keyway before you remove.
Gotta ask, you were heating the outer area of the gear, and not the cam itself, correct?
Make sure you have alignment marks scribed on the gear in relation to the keyway before you remove.
Last edited by HarDlife; Nov 7, 2013 at 10:30 AM.
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
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From: Coromandel Peninsula New Zealand
I have a stock cam here on my desk and comparing it to that pic I can tell you with a large degree of certainty that that isn't a stock cam....its way hotter by the looks of the lobes.
You can transfer the scribe marks onto the old cam gear by counting round from the timing marks, the scribes sit in the valleys between the teeth.
You can transfer the scribe marks onto the old cam gear by counting round from the timing marks, the scribes sit in the valleys between the teeth.
Last edited by Spanners39; Nov 7, 2013 at 03:05 PM.
Road Warrior
Joined: Jul 2013
Posts: 1,476
Likes: 5
From: Florida
I have a stock cam here on my desk and comparing it to that pic I can tell you with a large degree of certainty that that isn't a stock cam....its way hotter by the looks of the lobes.
You can transfer the scribe marks onto the old cam gear by counting round from the timing marks, the scribes sit in the valleys between the teeth.
You can transfer the scribe marks onto the old cam gear by counting round from the timing marks, the scribes sit in the valleys between the teeth.
lobes look like they might even be fatter than the 27 going in!
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
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From: Coromandel Peninsula New Zealand
Agreed on that point....EV might give better low down power though.
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Road Captain
Joined: Nov 2009
Posts: 737
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From: Scotland,UK
It was pressed on, it will come off. What type of press? When I just changed mine over, I simply secured the backside of the gear between two blocks of wood and gave the nose of the old cam several decent whacks with a hammer, came right out. Didn't give a flip what it did to the old cam, and it will not hurt the gear whatsoever.
Gotta ask, you were heating the outer area of the gear, and not the cam itself, correct?
Make sure you have alignment marks scribed on the gear in relation to the keyway before you remove.
Gotta ask, you were heating the outer area of the gear, and not the cam itself, correct?
Make sure you have alignment marks scribed on the gear in relation to the keyway before you remove.
which I have used previously for bearing removal etc .
As far as heating goes ...I would hope that he knew not to heat the Cam & the Gear but didnt ask as he was doing me a favour.
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Thread Starter
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Road Captain
Joined: Nov 2009
Posts: 737
Likes: 4
From: Scotland,UK
I have a stock cam here on my desk and comparing it to that pic I can tell you with a large degree of certainty that that isn't a stock cam....its way hotter by the looks of the lobes.
You can transfer the scribe marks onto the old cam gear by counting round from the timing marks, the scribes sit in the valleys between the teeth.
You can transfer the scribe marks onto the old cam gear by counting round from the timing marks, the scribes sit in the valleys between the teeth.
On the Gear (inner face) 0406. On the Gear (outer face) MG OEM 04006. (OEM0400G.?) Not sure if its a 6 or a G.
There doesnt appear to be much difference between the Lobes of the 04006 and the EV27. Measurements to "peak" of both sets almost identical although I cant say the same for the shape geometry. Have posted some more pics.
With regard to "keyway" differences & positions on both of the individual Cam Gears ....I still dont understand how the OLD Cam Gear will fit on the NEW Andrews Camshsaft. What determines the position of the Andrews Gear if the keyways dont line up?
Last edited by BungoBill; Nov 7, 2013 at 06:27 PM. Reason: adding pics
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Seasoned HDF Member
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From: Coromandel Peninsula New Zealand
Just make scribe marks on the old gear as I described on my earlier post.
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Road Captain
Joined: Nov 2009
Posts: 737
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From: Scotland,UK
Any thoughts re. the old Cam number as to whether it is revtech or factory HD. or whatever.