The Ford Barn

Platy1987 · 01-03-2018, 09:25 AM

Hi I ne question I came across these cylinder head bolts. Does one of the Navarro's heads on aluminum match the length? This set is for stock factory heads. The (16) short bolts in the kit are 2″ long, the (28) long bolts are 2 3/4″ long. (4) bolts are 2 1/4″ long.

GB SISSON · 01-03-2018, 10:50 AM

While I cannot be sure from where I sit, it seems a stock 8ba type head might use only 2 bolt lengths. 8ba heads I looked at last night looked like the 2 bolts per side in question were set deeper into the head on the 8ba style, while a 59ab type head has a raised boss for those two. I know for sure when one breaks tradition and uses head bolts on a 59ab, there are two odd length ones per side. Just above the bottom row. Washers in your kit would indicate these bolts were intended for aluminum heads, and the presence of the 4 mid-length bolts MIGHT indicate they were made for use on a 59 or earlier series block..

tubman · 01-03-2018, 11:09 AM

I have two sets of Edmunds 8BA heads and each head has two intermediate length bosses on each side just above the bottom row. I only had stock headbolts, but the shorter bolts "caught" 5 threads through these bosses, so I used them. No problems so far. I would have liked to have had a couple of sets of these when I put the engines together.

Platy1987 · 01-03-2018, 11:20 AM

Quote:

Originally Posted by Platy1987

Hi I ne question I came across these cylinder head bolts. Does one of the Navarro's heads on aluminum match the length? This set is for stock factory heads. The (16) short bolts in the kit are 2″ long, the (28) long bolts are 2 3/4″ long. (4) bolts are 2 1/4″ long.

I don't know what screws to order. have now ordered Navarre 8ba heads and was looking for matching screws. I think at the top of the picture that fit?

tubman · 01-03-2018, 11:48 AM

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I don't believe those are for factory heads, which don't use the "intermediate" length bolts. The aftermarket manufacturers often copied each other; if the Edmunds heads have two intermediate length bosses, the chances are pretty good that the Navarro's did too. You may have lucked out with these.

May I ask where you got (or are going to get) them?

01-03-2018, 10:50 AM	#2
GB SISSON Senior Member Join Date: Jan 2014 Location: Orcas Island Washington Posts: 5,881	Re: Cylinder Head Bolts While I cannot be sure from where I sit, it seems a stock 8ba type head might use only 2 bolt lengths. 8ba heads I looked at last night looked like the 2 bolts per side in question were set deeper into the head on the 8ba style, while a 59ab type head has a raised boss for those two. I know for sure when one breaks tradition and uses head bolts on a 59ab, there are two odd length ones per side. Just above the bottom row. Washers in your kit would indicate these bolts were intended for aluminum heads, and the presence of the 4 mid-length bolts MIGHT indicate they were made for use on a 59 or earlier series block.. __________________ Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1946 Tonner Pickup with 226 H six, 1979 Toyota landcruiser wagon, now wearing 1947 Ford Jailbar sheet metal. 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)

01-03-2018, 11:09 AM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 11,639	Re: Cylinder Head Bolts I have two sets of Edmunds 8BA heads and each head has two intermediate length bosses on each side just above the bottom row. I only had stock headbolts, but the shorter bolts "caught" 5 threads through these bosses, so I used them. No problems so far. I would have liked to have had a couple of sets of these when I put the engines together.

01-03-2018, 11:48 AM	#5
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 11,639	Re: Cylinder Head Bolts Sponsored Links (Register now to hide all advertisements) I don't believe those are for factory heads, which don't use the "intermediate" length bolts. The aftermarket manufacturers often copied each other; if the Edmunds heads have two intermediate length bosses, the chances are pretty good that the Navarro's did too. You may have lucked out with these. May I ask where you got (or are going to get) them?