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Which heads do i have? 1986 GMC Sierra 2500 bad valve guide
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Topic: Which heads do i have? 1986 GMC Sierra 2500 bad valve guide (Read 1751 times)
RichmondNick
Newbie
Posts: 3
1986 GMC Sierra 2500
Which heads do i have? 1986 GMC Sierra 2500 bad valve guide
«
on:
November 07, 2017, 08:11:38 PM »
Hello,
Can anyone guide me to know which heads i have?
Here is a vid of the valve guide
https://m.youtube.com/watch?v=XRn_v241ulk
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VileZambonie
Global Moderator
Senior Member
Posts: 19022
Re: Which heads do i have? 1986 GMC Sierra 2500 bad valve guide
«
Reply #1 on:
November 08, 2017, 11:38:55 AM »
You need to get the casting numbers off of the head. You already have the valve cover off so just clean the gunk and match it up
http://outintheshop.com/faq/casting/heads.html
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74 GMC
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75 K5
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84 GMC
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85 K20
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86 k20
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RichmondNick
Newbie
Posts: 3
1986 GMC Sierra 2500
Re: Which heads do i have? 1986 GMC Sierra 2500 bad valve guide
«
Reply #2 on:
November 16, 2017, 04:56:18 PM »
Thank you zombie.
Going to look at a set from Craigslist tonight.
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Which heads do i have? 1986 GMC Sierra 2500 bad valve guide