Thread: Solid Crank Pulley ....

I see no reason why not. I do question why.

I have a few motors that have harmonic balancers. You do realise, to balance them with the crank, you will have to strip the motor and send the components off to be balanced?

if you want a smoother running motor putting out an extra kw or two after you have rebuilt it, sure, why not. It only costs a little extra in the total rebuild costs.

I'd never run a solid on a Diesel...

I'd never run a single mass flywheel on a modern diesel either...

Originally Posted by Tombie

I'd never run a solid on a Diesel...

I'd never run a single mass flywheel on a modern diesel either...

Why not?
I just have one diesel. It has a solid mass harmonic balancer and a sizable one at that.
Or is the harmonic balancer on a 4BD1T so light it is just a pulley?
I am rather new to this diesel thing.

Originally Posted by Mick_Marsh

Why not?
I just have one diesel. It has a solid mass harmonic balancer and a sizable one at that.
Or is the harmonic balancer on a 4BD1T so light it is just a pulley?
I am rather new to this diesel thing.

Seen what the 4BD1 does to gearboxes etc from the engine pulses?

I'm not mechanically minded enough to give an explanation but using only logic i would'nt put such stress on the ''powertrain" like a solid crankshaft damper or flywheel, especially flywheel... i made the mistake to take a smart mechanics advice once and let him fit a solid flywheel on my D2 then removed it in less than 3 weeks cos i couldn bear the vibration and noise at high speeds, maybe it works for those who are using the D2 mostly off road but for motorway or normal road driving it's a disaster

afaik the crank pulley is more than a "harmonic balancer" cos it's officialy named "torsional vibration damper" which might be something else(or not?)

about the DMF, it's enough for me to read what's doing to understand why not solid, i wish i knew that before that unpleasant experience

The dual mass flywheel is used to insulate the gearbox from torsional and transient vibrations produced by the engine.
The flywheel comprises primary and secondary flywheels with the drive between the two transferred by a torsional
damper which comprises four coil springs.
....
Under high torque loading conditions the secondary flywheel can
rotate in either direction up to 70 degrees in relation to the primary flywheel. !!!

i hope this helps

Originally Posted by Tombie

Seen what the 4BD1 does to gearboxes etc from the engine pulses?

Nup.
Wouldn't a balanced harmonic balancer help prevent engine pulses? I'm sure it would for a petrol engine. What is different for a diesel?
I've not heard the term "`engine pulses" before. Is it a diesel thing?

Originally Posted by Mick_Marsh

Nup.
Wouldn't a balanced harmonic balancer help prevent engine pulses? I'm sure it would for a petrol engine. What is different for a diesel?
I've not heard the term "`engine pulses" before. Is it a diesel thing?

Not really, but more evident in a diesel.
It describes how the power comes from the engine, less smooth like an electric drill, more in spikes or pulses like an impact driver or rattle gun.

The purpose of these dual mass harmonic balancers and flywheels is to absorb or smooth out that hammer effect so your gearbox, transfer case, diffs, alternator, water pump etc etc do not.

Sent from my GT-S7562L using AULRO mobile app

Originally Posted by SSmith

Not really, but more evident in a diesel.
It describes how the power comes from the engine, less smooth like an electric drill, more in spikes or pulses like an impact driver or rattle gun.

The purpose of these dual mass harmonic balancers and flywheels is to absorb or smooth out that hammer effect so your gearbox, transfer case, diffs, alternator, water pump etc etc do not.

Sent from my GT-S7562L using AULRO mobile app

Ta.
That explains why the harmonic balancers on my other vehicles have a rubber component in them.
I also take it the diesel has more of a hammer effect, which seems more obvious now.