Do you think this is true? - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 06-15-2009, 08:38 PM Thread Starter
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Do you think this is true?

I read this about a truck on the internet and was wondering if there was any truth behind it... i know you cant believe everything you read.......

" In 2006 Ford increased the head bolt size to 16mm to help with the common problem of them stretching and allowing head gasket failure."

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post #2 of 4 Old 06-15-2009, 08:52 PM
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i still went through 2 HG's so they may have but I doubt it... if they did it didnt help... your best bet is still buy ARP's...

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post #3 of 4 Old 06-15-2009, 11:33 PM
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Ya buy arp's or H11's the didn't increase the bolt size just the torque pattern and thicker gaskets to try and alleviate some of the head gasket issues but if you do some digging around on this forum it wasn't a great fix.

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post #4 of 4 Old 06-16-2009, 03:25 AM
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The changes in 2006 did NOT include stronger or larger head bolts. They also did NOT include a thicker head gasket. Below is a list of the changes:

Subject: 2006 6.0L Diesel Power Stroke Cylinder Head Commonization
Effective Date: Ford Production Assembly Plants - January 11, 2006
Kentucky Truck Plant (Super Duty) & Lorraine Assembly Plant (Econoline)
Changes are being made to the 6.0L diesel cylinder head, head gasket, crankcase block, rocker arm carrier and injector hold down clamps for the 2006 Super Duty and Econoline Program. The action is taking place to facilitate/communize the International manufacturing process for the
upcoming 6.4L program. The 2006 6.0L used in Ford vehicles after January 11, 2006 are being referred to as "Commonization Engines".

Figure 1 - New cylinder head
1. Carrier boss bolt holes M10 x 1.5
2. Injector clamp bolt holes (relocated)
The new cylinder heads have several casting changes including a slight injector clamp bolt hole relocation (2, figure 1) and the carrier boss bolt hole size and location changes (1, figure 1). New cylinder heads also use 32 mm cup plugs replacing the old 28 mm cup plugs.
The cylinder head gasket is also new to accommodate the new 20mm cylinder head location dowels. Pre commonization head use 18mm dowels
Note: At this time the new cylinder head assembly is not interchangeable with the previously level head.

Figure 2 – Previous Level Cylinder Head
1. Carrier boss bolt holes M8 x 1.5
2. Injector clamp bolt holes (original locations)
Note: The previous level cylinder head assembly is not interchangeable with the new head.

Figure 3 - New Block Assembly
The new crankcase (block) uses two 20mm cylinder head locating dowels per head. The old crankcase (block) uses two 18mm cylinder head locating dowels per head.
Note: The new and old block assembly is not interchangeable. This affects replacement of all 6009 short blocks and the 6010 bare blocks.

Figure 4 - New Rocker Arm Carrier
Casting changes to the rocker carrier provide increased clearance for new injector hold down clamps (figure 6). The new carrier also uses only 2 bolts and locating dowels to attach the carrier to the head.
The new rocker carrier is serviced in a Rocker Arm Carrier Kit which includes the rocker carrier cover, gasket and necessary dowels.
Note: The new and old rocker arm carrier kits are not interchangeable.

Figure 5 – Previous Level Rocker Arm Carrier Kit
The old rocker arm carrier uses 4 attaching bolts to hold the carrier to the old cylinder head (figure 2).

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