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Stripped threads for water pump
Posted 03 April 2010 - 05:01 PM
Set torque wrench to 8 ft/lbs. Second time around the bolt at 2 oclock got real easy. You know that feeling.
When I took out the bolt, about 4 threads remained on the bolt.
Never tried helicoil on aluminum blocks. Is that the way to go is there a better alternative?
Getting a drill down there may be a challenge. Engine is in the car.
Posted 03 April 2010 - 06:12 PM
Posted 03 April 2010 - 07:43 PM
Heli-coil is the way to go, yes. Aluminium is soft - I would try running the heli-coil tap in without drilling.
Breaking off a tap there would be significantly worse than your current situation. Try borrowing an angle drill, buy one and return it, or pull the radiator.
Posted 03 April 2010 - 10:20 PM
Posted 04 April 2010 - 06:37 AM
Posted 04 April 2010 - 09:07 AM
If this doesn't work, then you can still go the helicoil route.
Posted 05 April 2010 - 02:30 PM
Posted 05 April 2010 - 04:08 PM
Posted 05 April 2010 - 08:35 PM
We retapped both. Purchased 2 slightly longer bolts to squeak an extra thread or 2.
10 o'clock thread seems fine.
The 5 o'clock hole is not a blind hole as the other 5. Opens to the back above the thermostat neck.
When the bolt was over-torqued the 'ear' cracked allowing coolant to leak badly. At this point we grabbed a beer and sat back.
Planning on using a die grinder to enlarge the crack slightly and fill with the magic juice (JB Weld).
Our fingers are crossed.
Small crack=big problem.
Reminds me of marriage.
Posted 05 April 2010 - 08:50 PM
my fix high temp silicone on water pump gasket both sides, let form (set up)
plumber tape TWO wraps on bolt rolled tight use finger nail to get in the treads best you can. Step 2 lock tight red tighten hand tight (snug)
3000 miles plus no problems.
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