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yact: crankshaft

zCypher

zCypher

Diamond Member
I dunno much when it comes to cars and its mechanics but my friend wants to know if his car will run with a broken crankshaft? lol

sounds pretty dumb... but no semi knowledgable car people are around here at the moment, so I figured i'd ask here and see what happens . 😛
 
Uuh.. no. If it had a broken crankshaft, it wouldn't run even if lord Jesus Christ came down from the heavens and commanded it to.
Well.. depending on if your talking about a CRACK or a complete severing.
 
Originally posted by: TommyWDetroit
Uuh.. no. If it had a broken crankshaft, it wouldn't run even if lord Jesus Christ came down from the heavens and commanded it to.
Well.. depending on if your talking about a CRACK or a complete severing.
Click to expand...
If it's cracked, then it won't run for very long.

ZV
 
It's possible, but not very likely! Depends on the type of break. My friend's 340 ran for a long time with a broken crank....it broke at the rear journal, but the shape of the break, and the fact that it couldn't spread apart, allowed it to continue to run and drive.

JC
 
Originally posted by: Zenmervolt
Originally posted by: TommyWDetroit
Uuh.. no. If it had a broken crankshaft, it wouldn't run even if lord Jesus Christ came down from the heavens and commanded it to.
Well.. depending on if your talking about a CRACK or a complete severing.
Click to expand...
If it's cracked, then it won't run for very long.

ZV
Click to expand...

Exactly.. it "might" run for a second or two if it was cracked, if that. But definately not if it was broke apart.
 
Ever see a two stroke spin a crank.. eww..

They are pressed in place with ball bearings usually..(you can have them welded but that's extra work)

all of a sudden all of your pistons hit top dead center at once and boom..

Broken crank in a 4 stroke = fix it now or risk losing your ENTIRE valve train also.
 
Originally posted by: Howard
It should have lasted a lot longer than that. What was it made of? How long was it used?
Click to expand...

uhh... lol... I'd imagine it was made out of steel..

Not sure how many miles were on the car. 😛

 
a broken crank is an engine that does not run. A broken crank usually means toasted motor. the pistons likely colided with the valves depending on where the crank broke. (also assuming this is an interference engine we are talking about)

a burnout is not likely to break a crank. You break a crank at 10,000 rpm, if then. usually something else gives way before the crank.
 
OK, I talked to my bro with the 340....he drove it home a couple miles after the crank broke....made a lot of racket, but would still start, run and drive after he got home!

Pic 1

Pic 2


Granted, this is truly an exception.....over 99% of broken cranks would result in a non-running condition.

JC
 
I had an '86 S10 Blazer that the crank broke just at the front of the number 2 main.It started and would drive.I only drove it about a hundred feet before I shut it off and called a friend with a flat bed to come and get me.When I got home it still started and ran but it made one hell of a racket.I doubt if it would have run very long but it did run.I still have the front of it in my garage that I use as a wheel chock once in awhile😉
 
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