375 HP 408cui qustion

[roaddevil]

A friend of mine bought this used Blueprint engine mentioned above. The seller said they had a main bearing issue and fixed it. I guess they made it wrong :-( The engine is realy hard to turnover, almost impossible with a regular ratchet, even if i reomove the sparkplugs. So my question is with a torque wrench, what should it take to spin ? The starter (90s dakota starter) also has problems to spin the engine with the Spark plugs in it:-( It broke two starters already :-(

 

[missing linc]

Wrong bearings, or bent crankshaft are my thoughts.

 

[junkyardhero]

iirc, the number should be something like 30 pounds of the feets. maybe add a few libres for the extra cubes, but either way you should be able to roll it over smooth with a 1/2" bar pretty easy.

the starter deal may be an entirely different and separate issue, though. alignment, mount, etc. etc.

 

[33IMP]

Yep, something seriously wrong in the bottom end. Disassembly and measurements required.
Should turn over fairly easily with a 1/2 ratchet, easily with a breaker bar/torque wrench. (Assiming it doest have 800 lb valve springs, lol)
A good starter/battery combo should tip it over sitting on the ground.

Edit: if the stroker crank has full filet rod radius, and standard non-filet bearings were used, yeah, it'd be real difficult to turn.... and put LOTS of metal in the oil.

 

[roaddevil]

iirc, the number should be something like 30 pounds of the feets. maybe add a few libres for the extra cubes, but either way you should be able to roll it over smooth with a 1/2" bar pretty easy.

the starter deal may be an entirely different and separate issue, though. alignment, mount, etc. etc.

I
mean waht can you do wrong with a starter ? Stick it in and tighten the 2 bolts ? Or do i miss something ?

 

[junkyardhero]

I
mean waht can you do wrong with a starter ? Stick it in and tighten the 2 bolts ? Or do i miss something ?

due to production/manufacturing tolerances and different components sometimes the critical engagement points can be off. occasionally they need adjusted, shimmed or otherwise you risk jamming parts together.

busting off a pair of turny bits sounds like ya might have a compatibility or alignment problem. iffin' it's too much with the tightness usually they just won't chooch instead of letting their insides into the outside.

 

[MomsDuster]

My question is: Did the seller “fix it” or did Blueprint? If the seller fixed it, I would guess it’s time to tear it down and take a look for yourself. It could even be an installation issue, torque converter not seated properly and causing a binding issue just one of numerous possibilities. Just my $.02