Another Crew Cab 6.9 Rebuild Update

[hesutton]

After being swamped at work over Christmas and New Years, I finally got a chance to get back to the 6.9 rebuild for my '86 crew cab.

The torque "typ4" for cam arrived and was ready for installation.

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Marked with "206" on the end.

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Stock cam:

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Torque cam:

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All the stuff that goes on the front of the camshaft:

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Cam in shop press, installing the lobes, gear, and such:

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Cam ready to install:

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More to follow:

Heath

 

[hesutton]

The cam was carefully installed being sure not to damage the new cam bearings.

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The piston cooling jets were next. Blue locktite and 14 ft/lbs or torque.

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The main bearings are Clevite 77's, got'm from Hypermax. Part number for the standard size is MS-1596 P.

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Plastigage was used to measure the oil clearence on the main bearings. The range is 0.0018 - 0.0036. All were within spec.

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More to follow:

Heath

 

[hesutton]

The main bearings were installed next.

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I used ARP thread lubricant to ensure all torque readings were accurate by reducing friction as much as possible.

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Crank to cam timing marks lined up:

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Crank installed and main caps torqued down. They need 75 ft/lbs the first step and 95 the second.

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All the main caps are marked 1 through 5. Five is the rear most cap and One is front most cap. The arrow ensures it's not on backwards.

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More to follow:

Heath

 

[Dsl_Dog_Treat]

ENGINE ****!!

 

[hesutton]

The rod and piston assemblies were next. These are the Clevite 77 rod bearings I got from Hypermax. The part number for the standard size is CB-1327 P. They were also plastigaged to check for oil clearence. The range for the rod bearings is 0.001 - 0.002 of an inch. They were all 0.0015.

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All the rods are marked. They should go back in the same cylinder they were removed from. They are a bit hard to see in the 1st photo. But, easier in the second. The rods torque to 38 the first step and 51 the second.

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I made this diagram when the rods were removed so I would know the correct location of each rod on installation.

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Piston/rod assemblies going in the block:

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Rotating assembly installed:

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That's it for now. I hope to have the heads on this coming weekend. We'll see how it goes.

Heath

 

[subway]

thanks for the pics!

 

[icanfixall]

Interesting coolant passage in the last pic... The lower passage on the right is differant than the one on the left. Wonder why.. Heath... Are those piston oil coolers new.. If so did you blow air thru them both ways to insure they are clear... Really nice pics too... I like looking at pics of your work.... Its always so informative.. Really sad to see the Mustang in the background sitting like that but... At least its inside. Did you torque the cam bolt to 25 lbs and what was the cam wear ring set too.. Really nice work too...

 

[hesutton]

Interesting coolant passage in the last pic... The lower passage on the right is differant than the one on the left. Wonder why.. Heath... Are those piston oil coolers new.. If so did you blow air thru them both ways to insure they are clear... Really nice pics too... I like looking at pics of your work.... Its always so informative.. Really sad to see the Mustang in the background sitting like that but... At least its inside. Did you torque the cam bolt to 25 lbs and what was the cam wear ring set too.. Really nice work too...

Not sure why the rear passage on the driver's side of the block is different but it is for some reason.

The piston cooling jets are not new. They (like everything) spent some quality time in the parts washer. Once finished there, they got a good bath with Brake Kleen, inside the tube and out.

The Mustang is Mom's. She's the bought it new in '66. One of Dad's many projects.

Yup, the cam bolt on the gear and the thrust plate were torqued with a bit a blue locktite.

Heath

 

[trackspeeder]

Very nice.

 

[Brimmstone]

Ok dumb question. Why the press to install the gear or you didn't have a hot plate around to heat the gear up so it will just slide on? I've done cams in the large diesels before and while a press was used to remove the gear all I ever did to install was lay the gear on a hot plate set on high till it measured 450 with my temp crayon and dropped it on the shaft.

 

[icanfixall]

450 degrees is too hot. Next time use 250 and no more especially if your heating up bearings. The larger the diameter the more something will grow. I noticed something Heath... All your pistons are installed correctly pointing the correct direction. Thanks for both pics of the head to block joint. This is extremely valueable information for later on. It cronicals the build and answers any questions about closed up internal parts. It saved my butt twice from taking something apart when I was building my engine. I began to question myself about how I had assembled things...

 

[racer30]

I learned something today, Looks good, I hope to use this info myself.

 

[The Warden]

you're making me want to go out and rebuild an engine, just to do it

Thanks for the pics looks like things are coming along nicely!

 

[GOOSE]

Heath, that looks aweome I can't wait to have a truck that is a build rather than a daily driver that can not afford to be down.

 

[Trying my best]

you're making me want to go out and rebuild an engine, just to do it

Thanks for the pics looks like things are coming along nicely!

X2