Replace harmonic balancer on 1993 Lexus SC300

I was unable to loosen the center bolt without turning crankshaft...any advice to keep crankshaft from turning?

by in Wildomar, CA on October 23, 2009
4 answers 4 comments
ANSWER by on October 23, 2009
im assuming you are not using air tools ,, that makes it hard ,, if you can acess the flywheel , you can try holding that while loosening the bolt, or put your socket and ratchet on the bolt , support the ractchet end of the wrench on the ground and quickly turn the engine over with the key,, let the starter break it loose ,, however be carefull doing it this way ,, make sure the engine is turning over the correct way ,and also only bump the key
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COMMENT by on October 24, 2009
Thank you Mastertech154. You're right..no air tools, no access to flywheel. I'm tempted to try the starter trick but I think I'll take it to a mechanic instead.
COMMENT by on July 15, 2010
Thank you again. I wound up taking it to my mechanic. I'll keep these suggestions on file in case I may need them again...I don't plan on ever getting rid of my SC300! But, now I think I need to replace the igniter. A mechanic replaced it about 8-9 years ago. Same cranking but no start condition as last time. Do you know if a novice (myself) should do the replacement or does it require computer adjusting, etc?
ANSWER by on June 26, 2010
I had to replace the distributor on my SC, in order not to get the car out of time.. I took the timing belt cover off, and used vice grips to lock the crank.. I would check around tho.. mine didnt move an inch!!!
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ANSWER by on July 15, 2010
Remove one of the spark plugs,now get a piece of nylon rope or just regular rope about two feet long thats small enough to go in the spark plug hole. Turn the engine over until the piston in the cylinder that you remove the spark plug from is at the bottom of its stroke.Now feed as much of the rope into the spark plug hole that you can but leave at least six inches sticking out. Now turn the engine over in the direction to loosen the bolt until it stops.Now you can remove the bolt.To re-install the balancer, put it back on the end of the crankshaft get the bolt started and start tighten it down until the engine starts turning in the opposite direction.When it stops turning continue tighten the bolt until it stops, this will press the balancer back on the crankshaft, then check the torque and you are done.Rotate the engine again in the opposite direction enough to remove the rope,replace the spark plug and be on your way.
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COMMENT by on July 15, 2010
Thank you. I wound up taking it to my mechanic prior to your answer. I'll keep these suggestions on file in case I may need them again...I don't plan on ever getting rid of my SC300! But, now I think I need to replace the igniter. A mechanic replaced it about 8-9 years ago. Same cranking but no start condition as last time. Do you know if a novice (myself) should do the replacement or does it require computer adjusting, etc?
COMMENT by on September 20, 2010
can a toyota camry alternator work in a lexus sc 300?
ANSWER by on May 04, 2011
a chain wrench