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Old 12-28-2022, 10:45 PM
Join Date: Feb 2020
Location: Austin TX
Posts: 51
miloh is on a distinguished road
Just so we have resolution to this thread, I bought 4x m6 1.0 40mm bolts. The ones on the block are shorter.

I sawed off the Philips head of two stainless steel 40mm bolts, had a friend with a metric tap and die come over. He, with a little oil, made sure the threads were good on the new threaded shafts we created by using the die.

We also verified the threads inside the block were good by using the tap. Very lightly we threaded through and cleaned out debris and stuff, which I assume is loctite. The new ones were a couple mm longer but donít come close to interfering with the pulley.

I have oem bolts on hold at the dealership. The first dealership quoted me $10.42 PER bolt, which coincidentally is 10x the price on real oem of $1.42. What a coincidence, huh. Second dealership said $4 per bolt. Fuck it, they came from Dallas.

Successfully installed new water pump, no leaks for 30ish miles.

My power steering pump is actually whatís making noise, the hoses are gone at the reservoir and it leaks from there. Both hoses arrive tomorrow.

So all in all, you can use m6x1.0 bolts, just use a die to make sure the threads are good on the new shaft. Iím unsure of whether shitty home depot stainless steel in the aluminum block is bad or not. The cold maybe made the original shafts more brittle, but I think I need to quit hitting the gym for a little bit :toobuff: and use a torque wrench even on small stuff.

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Old 01-06-2023, 12:46 PM
Join Date: Aug 2015
Location: Justin Texas
Posts: 548
AV8R4AA is on a distinguished road
I have always replaced my water pump pully with aluminum. That is the only URO product I have ever liked. I feel it dissipates heat better and gets a constant blast of air.
2003 4.6is X5
2003 525it
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