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bug_n_67
Samba Member
Joined: March 12, 2009
Posts: 229
Location: Essex,ON
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 Posted: Sat Jul 19, 2014 10:50 am Post subject: Height difference in Heads |
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So I was just replacing my jugs and piston and when I when to put my heads on one didn't seem to fit down as far as the other side. So I pulled them off switched them around to see if it was the jugs not right or the heads. As you can see from the pictures there is a difference on how the head sits. So do I worry about this, do I shim the other side so I have the same height for both sides. Or something maybe?
John |
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stan_tichomirov
Samba Member
Joined: May 24, 2005
Posts: 1719
Location: San Francisco, CA
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| Posted: Sat Jul 19, 2014 11:04 am Post subject: |
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Are they different castings? Could be the picture, but the one on the right looks to have one less cooling fin then the left.
Stan
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Jansen Enterprise
My 1835cc build
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bug_n_67
Samba Member
Joined: March 12, 2009
Posts: 229
Location: Essex,ON
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| Posted: Sat Jul 19, 2014 11:28 am Post subject: |
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Well Stan you were right on, cooling fines are pretty much the same but they are different castings. One says Mexico the other says 2BR. So should I use them or try and find a matching pair?
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PumaVW79
Samba Member
Joined: January 31, 2012
Posts: 487
Location: WGS84: 22.9083° S, 43.1964° W
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| Posted: Sat Jul 19, 2014 12:07 pm Post subject: |
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Measure the chambers volume
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Dale M.
Samba Member
Joined: April 12, 2006
Posts: 20378
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Sat Jul 19, 2014 1:21 pm Post subject: |
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| PumaVW79 wrote: |
Measure the chambers volume
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Ditto...
External appearance mean very little if they seat properly, combustion chamber size is everything...
Actually the ...
043-101-375R head is 33 mm intake 30mm exhaust - fuel injection head...
040-101-375H head is 35.5mm intake and 32 mm exhaust , Brazilian replacement head...
Dale
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...
Last edited by Dale M. on Sat Jul 19, 2014 1:32 pm; edited 1 time in total |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26781
Location: Colorado Springs
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| Posted: Sat Jul 19, 2014 1:30 pm Post subject: |
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| The 043 mexico head originally had a step in the chamber, the 040 did not. Yes you should CC the heads to make sure they match |
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66brm
Samba Member
Joined: January 25, 2010
Posts: 3676
Location: Perth Western Australia
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| Posted: Sun Jul 20, 2014 2:04 pm Post subject: |
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Check the valve sizes too......
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| modok wrote: |
| I am an expert at fitting things in holes, been doing it a long time |
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bug_n_67
Samba Member
Joined: March 12, 2009
Posts: 229
Location: Essex,ON
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| Posted: Sun Jul 20, 2014 6:06 pm Post subject: |
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They are all the same
8mm stem
32mm exhaust
35.5mm intake |
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Thomas333is
Samba Member
Joined: May 14, 2016
Posts: 67
Location: Lakewood
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| Posted: Thu Jun 23, 2016 3:58 am Post subject: Re: Height difference in Heads |
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I also
Just buy 2 haeds, they have the same part number but one is A
and other is R. Some say,!they are different valve diameter. I don't know who right or wrong
Thanks |
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rockurob
Samba Member
Joined: August 23, 2009
Posts: 358
Location: Okla City, Oklahoma
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modok
Samba Member
Joined: October 30, 2009
Posts: 26781
Location: Colorado Springs
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| Posted: Thu Jun 23, 2016 5:30 pm Post subject: Re: Height difference in Heads |
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| Thomas333is wrote: |
I also
Just buy 2 haeds, they have the same part number but one is A
and other is R. Some say,!they are different valve diameter. I don't know who right or wrong
Thanks |
I think you will find they are a set.
If you told the whole part number the might be more to say about it. |
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