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Pontiac of the Month

58Bonne's 1958 Bonneville

2019 June
of the Month

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MikeWhite88

OHC6 rebuild

Question

Well after getting my 68 Firebird to start for the first time in 39 years it appears that I’m gonna have to rebuild the 6cyl. Parts for these motors seem to be hard to find.. Does anyone know where I could get pistons, rings and bearings. And pretty much everything needed to rebuild it.

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I think this is SPRINT6's area of expertise.

How do you know you need a total rebuild or you just planning on a worse case scenario?

Edited by Frosty

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Well it’s pouring oil out of the tail pipe and smoking like a tar kettle. So most likely rings need to be replaced. And I don’t believe in digging into the engine without replacing bearings seals and gaskets along with sending the heads to the machine shop. So I figured unless it’s just some valve seals or something in the head I’ll be rebuilding. Straighten me out if I’m missing something.

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There are really only two main players for rebuild parts.

KANTER AUTO; https://www.kanter.com/productdetail.aspx?DeptNo=1400&MakeName=Pontiac&MakeYear=1968&CategoryID=31&ProductCode=1655&Router=Gallery

EGGE MACHINE; https://egge.com/product/kits.php?action=Search+MMY&kit_make=PONTIAC&kit_year=1968&kit_engine=250+CID

There are a few who also sell parts but nothing like full kits.

Here are a few items to give you a little insight to the OHC;  

First is my Pinterest page with Malcolm "MAC" McKellar's S.A.E. Report on the OHC 6 engine. He was the lead engineer on the OHC 6 program and this report offers a very good look into how it's designed.                                                https://www.pinterest.com/mrbigbluesky/pontiacs-new-1966-ohc-6-engine-mr-mckellar-report/

Second is a fairly recent OHC BUILD that also has some good information;   https://www.hemmings.com/magazine/mus/2017/01/Inside-the-Sprint-Six/3750446.html

Cheers

Edited by SPRINT 6

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Man you guys are awesome! I have been apart of several car and truck forums and non of them have guys that are willing to share their knowledge in such quick friendly manner. I’m already loving the old school Pontiac community! 

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