mismatched rockerarms ?
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Road Master
Joined: Oct 2011
Posts: 957
Likes: 2
From: Carlsbad Springs Ontario
mismatched rockerarms ?
Rebuilding a 1990 Evo. and i think i might have mistakenly switched the exhaust and intake rockers for the front cylinder ?
I am certain about the rocker locations for the rear cylinder and labeled them correctly etc. Im not sure about the fronts for two reasons...
1) it is possible i mismatched the labeling of the front rockers during dissasembly.
2) the stamped #s on all four rockers indicate that i actually did mismatch the two rockers for the front cylinder .
The stampings on the rear cyl. exhaust rocker are A15 38. Intake is stamped 36. (I am sure about these).
The stampings on the front cyl. exhaust are 38 and the intake is A15 38. (i am not sure about these).
Did i screw up here ?
I am certain about the rocker locations for the rear cylinder and labeled them correctly etc. Im not sure about the fronts for two reasons...
1) it is possible i mismatched the labeling of the front rockers during dissasembly.
2) the stamped #s on all four rockers indicate that i actually did mismatch the two rockers for the front cylinder .
The stampings on the rear cyl. exhaust rocker are A15 38. Intake is stamped 36. (I am sure about these).
The stampings on the front cyl. exhaust are 38 and the intake is A15 38. (i am not sure about these).
Did i screw up here ?
Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
IIRC the two rocker assemblies are identical. In any event one end of each rocker contacts the valve, the other the pushrod, Even if they are the wrong way around, it should be obvious, by comparing the two sets. It's a while since I last had mine apart, but I can't think how you can screw up!
Seasoned HDF Member
Joined: Nov 2009
Posts: 15,705
Likes: 22,718
From: Farmington ,MS
The front exhaust is the same as the rear intake and vice-versa ...you could not reverse them on one head and get it together
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Road Master
Joined: Oct 2011
Posts: 957
Likes: 2
From: Carlsbad Springs Ontario
mismatched rockers
IIRC the two rocker assemblies are identical. In any event one end of each rocker contacts the valve, the other the pushrod, Even if they are the wrong way around, it should be obvious, by comparing the two sets. It's a while since I last had mine apart, but I can't think how you can screw up!
The rockers are worn to there original valve and pushrod contact points and i was consirned that by inadvertantly switching the rocker arms for one cyl. only from exhaust to intake or visa vera ., it would not be proper and as this is my first Harley rebuild i want to be correct etc. I personaly dont think its a big deal but the manuals and common sense dictate that this is best etc.
Regarding the 1990 Evo... have you had any issues with swapping cams .?
I purchased a Andrews EV 27 and now learn that the cam gear must be swapped to the old gear etc.???
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Thanks for the reply grbrown ., i am aware that it is a very good practise to replace all parts back into there original home .
The rockers are worn to there original valve and pushrod contact points and i was consirned that by inadvertantly switching the rocker arms for one cyl. only from exhaust to intake or visa vera ., it would not be proper and as this is my first Harley rebuild i want to be correct etc. I personaly dont think its a big deal but the manuals and common sense dictate that this is best etc.
Regarding the 1990 Evo... have you had any issues with swapping cams .?
I purchased a Andrews EV 27 and now learn that the cam gear must be swapped to the old gear etc.???
The rockers are worn to there original valve and pushrod contact points and i was consirned that by inadvertantly switching the rocker arms for one cyl. only from exhaust to intake or visa vera ., it would not be proper and as this is my first Harley rebuild i want to be correct etc. I personaly dont think its a big deal but the manuals and common sense dictate that this is best etc.
Regarding the 1990 Evo... have you had any issues with swapping cams .?
I purchased a Andrews EV 27 and now learn that the cam gear must be swapped to the old gear etc.???
Should be ?? YES
I swapped mine before I found this forum and I just pulled the old one and slid in the new one (I also replace the cam bearing while I was there).
It made a hell of a whine but I was told it was no big deal and that it would go away in about 5k miles. It did.
I now have about 35k on the bike since I did the swap.
Still going strong.
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Road Master
Joined: Oct 2011
Posts: 957
Likes: 2
From: Carlsbad Springs Ontario
Andrews cam gear.
Must be?? NO
Should be ?? YES
I swapped mine before I found this forum and I just pulled the old one and slid in the new one (I also replace the cam bearing while I was there).
It made a hell of a whine but I was told it was no big deal and that it would go away in about 5k miles. It did.
I now have about 35k on the bike since I did the swap.
Still going strong.
Should be ?? YES
I swapped mine before I found this forum and I just pulled the old one and slid in the new one (I also replace the cam bearing while I was there).
It made a hell of a whine but I was told it was no big deal and that it would go away in about 5k miles. It did.
I now have about 35k on the bike since I did the swap.
Still going strong.
From what i understand there is a big deal between the ones who change over the gear and the ones who dont and let it ride .?
A heavy gear whine seems to me to be metal loosing metal as it meshes .???
If the cam gear oil goes straight to the oil filter and is caught there , i would say ok.? But Damned ???
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Thanks Tex. , did you notice anything nasty in the next oil change or was everyrthing ok.?
From what i understand there is a big deal between the ones who change over the gear and the ones who dont and let it ride .?
A heavy gear whine seems to me to be metal loosing metal as it meshes .???
If the cam gear oil goes straight to the oil filter and is caught there , i would say ok.? But Damned ???
From what i understand there is a big deal between the ones who change over the gear and the ones who dont and let it ride .?
A heavy gear whine seems to me to be metal loosing metal as it meshes .???
If the cam gear oil goes straight to the oil filter and is caught there , i would say ok.? But Damned ???
Sorry man I don't remember.
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Banned
Joined: Jul 2010
Posts: 853
Likes: 19
From: Melbourne
I always swap the gear on the cam body....I do not have a press but the local dealer does the job for me if I take all the parts into him.
Way less stressful and cheaper than trying to measure what gear size you need etc.
Way less stressful and cheaper than trying to measure what gear size you need etc.
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