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Ok thanks for the reply’s! I noticed the Cucv clutch is bigger then the new clutch I got from O’Rileys. Is there going to be a difference between them? I was hoping to get a clutch that engages at lower temps and rpms. I never heard the Cucv clutch engage before. Even at 130 degrees.

Here is where I left it at for today. The rest of the night was spent running back and forth to the parts store to figure out the best fitting belt sizes to compliment the Dampened V-Belt Crank Pulley since it is not the same size as OEM. Here are the 3 best fitting V-Belt part numbers that...

Next up, the 6.5 exhaust manifold heat shield. I cleaned this one up in my kitchen sink and installed it. I had to move around the rubber return injector lines to make sure they did not touch the heat shield. I also got the rear motor puller bracket installed and the power steering pump...

I removed the new harmonic balancer and installed my Fluidamper. Here is a real treat for you guys! Last year I scored a Dampened V-Belt Crank Pulley. They are super rare and are not made anymore. This one is still in like new shape. I cleaned it up in the kitchen sink from all the dust it...

I cleaned up the water pump pulley in the sink and mounted it. Compairing the 6.2 Oem 5 blade fan to the 1977-1979 Pontiac 454 7 blade fan, the new 6.2 fan clutch bolts right on! I washed the 7 blade in the sink and installed it just for a mock up.

It finally warmed up and I have 3 days off work! I installed an Oem 6.5 oil fill line for the turbo. Then installed a 6.2 fuel return hard line and a used clear tube connecting the ip return to the hard line.

I think I read that the Cucv fan does not engage until it is at 130 degrees? Is that correct? Could I be miss informed? If this is true, would there be a fan clutch that would engage at a lower temp?

Along time ago I researched and researched for a 6.2 diesel fan upgrade. Well... there isn’t one... At least that I am aware of... However there is a fan that is built for a 1977-1979 Pontiac 454 that bolts right up to a 6.2 Diesel fan clutch. They do not make them anymore either... Here is...

Well done for the day. I have to work this weekend and have some family coming to visit next weekend, so I do not know when I’ll get more time to work on this Optimizer. Stay tuned!

Not forgetting the timing mark bracket... Also got the Cucv J Code Dual Alternators installed. So far so good as far as figments go. A quick mock up of the Quadstar upper plenum.

While working on the motor today, I took a quick parts run/break and test drove a 2004 Chevy Duramax Dually. I can not stop thinking about it! 165,000 miles and only $14,500. It would be so nice to have this truck with a big camper and tow the M1009 to the trailheads.

Next up is the 6.2 water cross over, coolant temp sensor and heater core fitting nipple. I used some Blue RTV on the threads of the heater core fitting nipple and thread tape on the coolant temp sensor. For the oil fill tube, I used a 6.5 because the 6.2 oil fill tube is not needed with the CDR...

It is water pump time! I noticed BMI did not clean out the valleys on the timing cover. A simple flathead and some scraping did the trick. The water pump I choose to use is an upgraded 16 blade from Flow Kooler. It is said to flow about 115 GPM compared to the Oem 6.2 85-89 GMP. It was $177...

I had some fitment issues with the intake manifold. The edges of the valve covers were in the way preventing the intake manifold from fitting snug against the gaskets. I ground down the lip on the valve covers with my carbide bit. The Optimizer timing cover does not have a timing mark for the...

Today I got the modified oil pan on. With the motor upside down, I used Optimum Black RTV and a gasket to seal it. I also installed the Oil Temperature sensor on the oil pan. With my second set of Injector rings, the first set I ordered did not fit, I put antisieze on the new injector threads...

When I purchased a plethora of 6.2 and 6.5 parts from a gentleman locally, I scored me a custom modified 6.5 Dual Thermostat Crossover that had its spout lengthened and a custom bracket for the throttle cable and high idle solenoid. I plan on attempting to use this in the near future if it fits...

Just for reference. Here are 4 oil port locations on the 6.5 Optimizer.

The 6.5 Optimizer has quite a few oil port access locations. One is in the valley which I will not be using. I took off the rear oil port plug, put some Optimum Black RTV on the threads and relocated that plug in the valley oil port since it did not have a plug. Using a new to me product to...

I then ordered a boost gauge, pyrometer, wiring, probe and a mechanical turbo master boost controller from Kennedy Diesel.

Such a nice day today! I love having weekdays off work because all the businesses are open! Lol! Got some stuff done today. I refurbished a 6.2 Water pump plate. First I scraped off all the old gasket and RTV with a razor blade, then used a wire wheel on my cordless to get the plate some what...