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CRANKSHAFT REAR MAIN SEAL (BLOCKING TOOL)

SKU: 1140102RBU

$ 6.00

Description

  • CRANK BLOCKING NYLON BOLT
This bolt/nut fits TEMPORARILY in place of the alternator rotor bolt, while working/replacing the rear main seal.
This method stops the crank moving or \’floating\’ forward while the flywheel and crankshaft rear collar (if fitted) are removed.
This is a MUST, if you remove the flywheel for any reason. It will save you a lot of time and money.
If the crankshaft is allowed to move forward, the inner thrust washer can come off its locating pins, then when you put the flywheel back on and do up the flywheel bolts, this will BEND and damage this thrust washer !
This would then require the engine to be removed and COMPLETELY dismantled!
Even if you notice the crankshaft has moved forward and you have not damaged the crank thrust washer,
as a minimum you will still have to remove R/H Head and Cylinder to access and manipulate the washer back onto its pins.
These are the steps to using this bolt:
1. Remove battery earth cable from gearbox (Stops damaging electrical components in front cover)
2. Remove front cover
3. Remove alternator rotor centre Allen bolt
4. Fit nylon bolt and nut into hole and adjust till about 12mm > 13mm protrudes from the end of the rotor
5. Fit front engine cover and LIGHTLY screw its allen bolts up until it contacts the nylon bolt head
   (The cover bolts don\’t have to be tight, it\’s only to keep the crankshaft from moving forward)
6. Fit new rear main seal.
7. Please note when fitting (NEW) flywheel bolts, do up in a criss cross pattern. FIRSTLY, hand tighten only and check the CRANK TURNS FREELY AND SMOOTHLY (Take pressure off front cover before trying to turn crank!)
8. If crankshaft turns OK,  finish torquing up new bolts and replace all other parts at rear of motor.
9. Remember to remove nylon blocker bolt on alternator and refit original and tighten!
                **SEE EXTRA IMAGES BELOW FOR EXAMPLE OF HOW TO USE THIS TOOL**
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