ak diesel driver
6.5 driver
Quite a few people have done it. Leroy sells a gear drive unit.
-
Welcome to The Truck Stop! We see you haven't REGISTERED yet.
Your truck knowledge is missing!
- Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
- We have tons of knowledge here for your diesel truck!
- Post your own topics and reply to existing threads to help others out!
- NO ADS! The site is fully functional and ad free!
Problems registering? Click here to contact us!
Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!
‘94 Suburban Stalling w/ Codes
- Thread starter Big T
- Start date
TDexter
New Member
I think I will go to it when I freshen up my old girl.
ak diesel driver
6.5 driver
I've got 2 sets yet to be installed. Waiting to do my optimser build for one of them.
ak diesel driver
6.5 driver
Hopefully your block isn't cracked when you go to do it.
TDexter
New Member
Should I think my block is cracked for some reason?
ak diesel driver
6.5 driver
Very common for even a good running engine to have main bearing web cracks. They crack at the bolt holes. Imo there are several contributing factor. Harmonic balancer is at the top of the list. Poor design and casting by GM. And lastly is getting them too hot.
TDexter
New Member
The old 5.7 conversion engine used to crack around the head bolts, cracks around the mains, broken crankshafts, etc., but I have seen some with over 300,000 on them. I feel like at 318,000 my 6.5 must be one of the good ones, if it is the original engine. I have no idea about the history of the truck, other than every body panel on the truck is dented and scratched.
Will L.
Well-Known Member
Oh no! Another 5.7 diesel knowledge guy- IS @WarWagon your friend? Haha
The mainwebs crack in my experience always from bad harmonic balancers. To be fair, non of these engines are well balanced internally. But I have not seen one that cracked with good balancers or that didn’t get some unfair abuse like hydrolock, or starting fluid blasting things apart.
I had timing gears on my hot rodded 6.5s back in the day.
DSG no longer makes them, so Leroy chased it down.
http://leroydiesel.com/products/timekeeper-ds4-timing-gear-set/
The fords running same db2 injector pumps got much longer life from them than gm, and only 2 differences was 3/8” fuel
Line instead of GMs 5/16 and no chain to slap around the pump.
The only drawback besides price is there is slightly more drag on the straight cut gears than double roller chain. But worth it. Now if the drag is a concern, do what I am doing and send timing gears, and the ip gears to Chris for slip coating.
https://m.facebook.com/TwistedSteelPerformance/
I don’t have (not sure anyone will ever bother to figure out) which is less drag between the coated gears vs chain. But it never hurts and will sure promote a long life, so Wether I gain or loose 2 hp now, it will be a bet gain not loosing 10 hp from timing chain stretch.
And less chain slap ever time I accelerate or decelerate, is less shock to the crankshaft, camshaft, and ip.
The mainwebs crack in my experience always from bad harmonic balancers. To be fair, non of these engines are well balanced internally. But I have not seen one that cracked with good balancers or that didn’t get some unfair abuse like hydrolock, or starting fluid blasting things apart.
I had timing gears on my hot rodded 6.5s back in the day.
DSG no longer makes them, so Leroy chased it down.
http://leroydiesel.com/products/timekeeper-ds4-timing-gear-set/
The fords running same db2 injector pumps got much longer life from them than gm, and only 2 differences was 3/8” fuel
Line instead of GMs 5/16 and no chain to slap around the pump.
The only drawback besides price is there is slightly more drag on the straight cut gears than double roller chain. But worth it. Now if the drag is a concern, do what I am doing and send timing gears, and the ip gears to Chris for slip coating.
https://m.facebook.com/TwistedSteelPerformance/
I don’t have (not sure anyone will ever bother to figure out) which is less drag between the coated gears vs chain. But it never hurts and will sure promote a long life, so Wether I gain or loose 2 hp now, it will be a bet gain not loosing 10 hp from timing chain stretch.
And less chain slap ever time I accelerate or decelerate, is less shock to the crankshaft, camshaft, and ip.