Differences left/right cylinder heads?


Information and questions on GL1000 Goldwings (1975-1979)
Post Reply
kndw
Posts: 132
Joined: Sat Jun 19, 2010 2:56 am
Location: Driebergen, Utrecht
Motorcycle: 1976 GL1000 Gran' Luxe

Differences left/right cylinder heads?

Post by kndw »



Hi,

The cylinder heads of my '76 GL1000 have been rebuilt at a machine shop, and now I'm puzzled as to which head is the left, and which is the right.

The only differences I could find were:
1. some markings on the bottom of each head. Both have the letters 'ZL', but one head also has marking that say "3 KR", while the other has "4 KR";
2. there is some residue of the rubber seals at 3 of the 4 'holes' where the camshafts exit the head, making me suspect that the clean one is where the fuel pump was, since that hole doesn't have such a gasket. That would make that the right hand head.

Am I missing something really obvious? Even if the heads are identical, I imagine it is of importance to match the camshaft and head as they were.

Thanks!


User avatar
Fred Camper
Posts: 1339
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Differences left/right cylinder heads?

Post by Fred Camper »

The fuel pump is a solid clue. I would go with that since I have not heard they are identical. So since I too am not sure, go with the clue.
User avatar
WingAdmin
Site Admin
Posts: 22961
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer
Contact:

Re: Differences left/right cylinder heads?

Post by WingAdmin »

They are identical - looking at the parts manual, the left and right head assemblies have the same part numbers.

That said, I'm with you - I would match them to the way they were, as they've been spending almost 40 years seating into one another.
User avatar
DenverWinger
Posts: 2198
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Differences left/right cylinder heads?

Post by DenverWinger »

The camshafts are the clue, I had heads machined without removing cams, so the fuel pump drive and ignition point drive were a dead giveaway. But if the cams were removed, since same part number both heads either cam should fit either head. So best guess at that point....
There are 10 types of people in the world, those that understand binary numbers, and those that don't. :lol:

♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:
~Mark
kndw
Posts: 132
Joined: Sat Jun 19, 2010 2:56 am
Location: Driebergen, Utrecht
Motorcycle: 1976 GL1000 Gran' Luxe

Re: Differences left/right cylinder heads?

Post by kndw »

WingAdmin wrote: Thu Dec 14, 2017 10:28 pm They are identical - looking at the parts manual, the left and right head assemblies have the same part numbers.
:D Smart! Should have thought of that.

Alright, I'll go with the fuel pump clue.


Post Reply