Crankshaft balancing

Balancing a Jaguar E Type crank at Classic Jaguar in Austin, Texas

www.classicjaguar.com/sb.html

Category:

Autos & Vehicles

Tags:

• classic
• jaguar
• austin
• texas
• etype
• xke
• crankshaft
• e-type
• restoration

[ClassicJaguarUSA]

Removing material (weight).

[arman757]

Well Im no ASE certified master machinist but uhm wheres your flywheel and crank pulley at? i was taught they are balanced as one bolted together rotating assembly. so are you just half assing that balance job? or do you know something i dont?

[ClassicJaguarUSA]

Actually, we balance the crankshaft first THEN add the flywheel, clutch pressure plate and harmonic balancer and balance the entire rotating assembly together. This video clip is entitled "balancing a crankshaft", not "balancing a rotating assembly". Thank you for your question.

[regcer]

Do you balance the driveshaft with the weight of the piston and rods inputted in the computer or do they cancel out each other due to there placement of the driveshaft? By the looks of it it kind of looks like ballancing tires but more complicated to add or remove wieght.

[ClassicJaguarUSA]

regcer: This video is for an in-line 6 cylinder engine. Typically, in-line engines do not require bobweights for balancing.

V-motors would require bobweights to counteract the push/pull of the rod/piston assembly at a given degree.

[1965mustangfb]

SONG NAME PLEASE!!!

[freeman67891011]

Out of all the brands, Jaguar is the least reliable car on the market. What a waste of time trying to salvage a junk.

[stoobers1]

@hazmat440 I know this is an old thread, but I will throw this out there:

I don't know for sure, but I would use a timing light, activated by the crank bouncing when it spins. If the drive could only pivot up and down, the crank would bounce up and down. The timing light would show the position the crank is at when bouncing, and you could grind a bit to lessen the bouncing effect.

[Deusrexmachina]

I thumbed up twice only for this coooooooooooooool tune. :D

[ROCKSOLID19]

The crankshaft is as divine as this music!

[thatguywillt]

Digital balancer, I'm jealous. We're still hobbling along using an analog Stewart Warner balancer. Works great, just needs more manual maths.

[SALEEN961]

You don't need bob weights on a 180* crankshaft like this one. You balance the crankshaft first, then add the flywheel and balance it; if you balance them as an assembly then when you replace/machine the flywheel as part of a clutch replacement you would have to remove the crankshaft and re-balance the whole assembly again. By balancing each part of the assembly separately you can replace the flywheel later on without changing the balance by just balancing the flywheel before it's installed.

[seenalotabs]

@Trimadian65 When you talk like that it only showes how little you know about balancing, some cranks require Bob-weights and some don't. it depends on the design of the crank. American V-8 all require them Most European V-8 don't. when you have an inline motor with even number of pistons like 2-4-6-8 as long as all pistons are either up or down and not some up, some down, some part way there is no need for Bob-weights.

[slbargas]

do you know the 3 cylinder crank balancing techniques? thanks