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6.5/SM465

Jspohr

Jspohr

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Needing to find out what is a good clutch to put in this combo since 6.5's did not come from the factory this way. I believe that the ones that were used on the 6.2 will work but not sure and was wondering if anyone had any first hand experience?

If the 6.2 works, then would I need the 6.2 flywheel also?

Thanks!
 
Ah I see. I read your post wrong. Hopefully one of the 6.5 guru's I tagged will know something.
 
Jspohr said:
Needing to find out what is a good clutch to put in this combo since 6.5's did not come from the factory this way. I believe that the ones that were used on the 6.2 will work but not sure and was wondering if anyone had any first hand experience?

If the 6.2 works, then would I need the 6.2 flywheel also?

Thanks!
Click to expand...

The 6.2 flywheel and clutch are what you want. These are dimensionally identical to a single-mass 6.5 clutch setup, so those parts will also work. The SM465 will bolt up to the block exactly like a stock NV4500 would. Make sure your throw out bearing matches your pressure plate offset, pivot arm, and pivot location. My bearing was too thin and I wound up needing a longer rod on my slave cylinder (The arm aaaaaalmost bottomed out on the back of the bell housing). It wouldn't have been a problem had I not been mixing a pile of junkyard parts.

The dual-mass 6.5 flywheel will also fit, but it has a terrible reputation for longevity. Avoid it.

The SBC flywheel will bolt on convincingly, but it will not be balanced correctly.
 
Sorry, I'm no help on this particular one...I would imagine it wouldn't be different than a 6.2/465 setup...but the devil is always in the details.
 
A 6.5 is nothing more then a bored out 6.2. So order parts for the 6.2 setup and you should be good.
 
KirsL said:
A 6.5 is nothing more then a bored out 6.2. So order parts for the 6.2 setup and you should be good.
Click to expand...

In essence, yes. But there are several versions of the block, and lots of minor changes over the years. Main caps, heads (twice), injectors (twice) rear main seal, injection pump, water pump (twice), thermostat housing, radiator, glow plug controller (several times), CDR, EGR, EPR, manifolds, flywheel (twice), and oodles of changes to the trucks themselves. It's not too hard to find a combination of parts that are incompatible.

The devil is in the details.
 
Campfire :

I wonder if since a SBC flexpate or flywheel will bolt up to a 6.2,if I could simply knock the balance weight off the 6.2 flex plate and use it on a SBC ,if the 6.2 decided to grenade --that would save the expense and hassle of locating a flex plate for the 6 bolt torque converter..
(I know the stall speed is lower on the diesel's converter,but that doesn't matter to me,I like the lower stall,less slippage)..

I know some guys who just used the flexplate off the SBC and only put the three bolts in the converter and left the other 3 "empty" and had no problems,but I am not sure I'd trust that..
 
diesel4me said:
Campfire :

I wonder if since a SBC flexpate or flywheel will bolt up to a 6.2,if I could simply knock the balance weight off the 6.2 flex plate and use it on a SBC ,if the 6.2 decided to grenade --that would save the expense and hassle of locating a flex plate for the 6 bolt torque converter..
(I know the stall speed is lower on the diesel's converter,but that doesn't matter to me,I like the lower stall,less slippage)..

I know some guys who just used the flexplate off the SBC and only put the three bolts in the converter and left the other 3 "empty" and had no problems,but I am not sure I'd trust that..
Click to expand...

I'd run 3 bolts. That's what an SBC is designed for, so I do not think it would be a problem. For what it's worth, my Suburban came with a gasser 3-bolt TC bolted to the stock 6-bolt flexplate. I know that's opposite of what you were considering, but it shows how easily the torque converters interchange.

The fluid in the torque converter provides some of the rotational balancing on an automatic truck. This works the same way as balance beads inside a tire, the fluid will slosh around until the system balances out. The flywheel doesn't have this option and uses substantially more balance weight to accomplish the same task. So you might find that the flexplate weight doesn't throw off the balance as much as you think.
 
campfire said:
In essence, yes. But there are several versions of the block, and lots of minor changes over the years. Main caps, heads (twice), injectors (twice) rear main seal, injection pump, water pump (twice), thermostat housing, radiator, glow plug controller (several times), CDR, EGR, EPR, manifolds, flywheel (twice), and oodles of changes to the trucks themselves. It's not too hard to find a combination of parts that are incompatible.

The devil is in the details.
Click to expand...

Very true. But the area he's concerned with, it's all pretty close.
 
I also thought of something right after I posted--the 6.2 has 139 teeth on the flywheel or flex plate,and the starter drive has a different tooth count than a gas V8 starter drive,and I doubt the 6.2 starter would be in the right spot IF its bolt pattern is the same as the gas engine starter (I think it is,but the engine blocks differ,the 153 or 168 tooth flywheels are both probably different diameter than the 6.2 one ,so its not possible to re-use the flex plate from one on a gas V8..

I would not be scared to use just 3 bolts ,seeing 454's only had three in many car & light truck applications ,some 1 tons and RV's used the 6 bolt torque converter with the matching flex plate,I just wondered it having the other three bolt holes on the converter being left "boltless" would be enough to throw off the balance..the guys I know who used 3 out of six said they didn't notice any vibrations..

But I know how bad a 400SB or 454 flex plate with balance weights will make any other gas V8 shake like a cocktail shaker!..and the weight aren't all that heavy..
 
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campfire said:
The 6.2 flywheel and clutch are what you want. These are dimensionally identical to a single-mass 6.5 clutch setup, so those parts will also work. The SM465 will bolt up to the block exactly like a stock NV4500 would. Make sure your throw out bearing matches your pressure plate offset, pivot arm, and pivot location. My bearing was too thin and I wound up needing a longer rod on my slave cylinder (The arm aaaaaalmost bottomed out on the back of the bell housing). It wouldn't have been a problem had I not been mixing a pile of junkyard parts.

The dual-mass 6.5 flywheel will also fit, but it has a terrible reputation for longevity. Avoid it.

The SBC flywheel will bolt on convincingly, but it will not be balanced correctly.
Click to expand...

I'm thinking about going with a hydraulic throw out bearing. that shouldn't change anything, right?

Also, will the original 6.5 starter will be fine with the 6.2 flywheel?
 
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I have gear reduction starters off 6.5's on both of my 6.2's and they crank faster and drain the batteries less...just be sure to get the forward brace for the starter motor to block,its different than the one used on direct drive starters..or make one..important so it'll keep the strain off the two mounting bolts..
 
Jspohr said:
I'm thinking about going with a hydraulic throw out bearing. that shouldn't change anything, right?

Also, will the original 6.5 starter will be fine with the 6.2 flywheel?
Click to expand...
6.5L starter is an upgrade for a 6.2L so that will work for either and actually be better. Just make sure it has the correct brace on the front of starter going to the side of the block.
 
Jspohr said:
I'm thinking about going with a hydraulic throw out bearing. that shouldn't change anything, right?

Also, will the original 6.5 starter will be fine with the 6.2 flywheel?
Click to expand...

Both will be fine. The front end of the SM465 will fit exactly like the stock NV4500 would have. You just need the TOB to fit the 465 and you will be fine.
 
Truckman4life said:
6.5L starter is an upgrade for a 6.2L so that will work for either and actually be better. Just make sure it has the correct brace on the front of starter going to the side of the block.
Click to expand...

Thanks a bunch.
campfire said:
Both will be fine. The front end of the SM465 will fit exactly like the stock NV4500 would have. You just need the TOB to fit the 465 and you will be fine.
Click to expand...
Thanks!
 
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