Every Water Pump I've had has cracked eventually all in the same place. Is this a known problem? Searched and havent found squat. I have a 7 blade gm fan, HD clutch and a 2" spacer... I'm thinking the added stress of that may have caused it to crack, but I have also had them crack on me when I had my tiny 5 blade and no spacer. Regardless, I'm most going to electric fans.
Is this all on the same engine?, OR just this one?, I never had an issue cracking. But on my regal I used to run I think a 2 or 3" spacer with a solid fan from summit and I had the seals start leaking on 2 different pumps both were new, 2 different brands. I came to the conclusion it was 2 much sticking out the front the pump. In case I would say maybe your fan is out of balance,or bent or pulley is bent or lastly you have too much sticking out as well, maybe the 5 blade was outta balance. My solve was dual spal 11" fans with northern aluminum radiator. You can get knock off dual 11" on eBay. But you'll need the controls and some mounts. https://www.ebay.com/itm/Universal-...229267&hash=item3f15dfe3df:g:VwQAAOxyHslQ4Q9K
Let me guess you put a spacer on to get it in the fan shroud? I know I did thinking it would work. It did 3 pumps later, 2 different spacers, time, more wasted money and frustration. I gave up and went electric best thing I every did and NEVER have looked back. Except when the sensor to kick them on failed then I ground the wire out to turn them on. Till I got a new sensor. Sorry I tend to talk to much when I start
Yep. Using a 307 olds shroud setup, had to use a spacer to get the fan in the shroud, it's a heavy 7 blade from my old 454 suburban. it cools fine, but at the expense of a water pump every time, no. Dodge intrepid fans it is, at least that seems to be the go-to with g body engine swaps, buick or not.
If the fan/spacer/clutch rotating assembly was out of balance I'd think the water pump bearing would be the first to go. I still say check that dowel pin, if the dowel is keeping the pump from seating flat on the cover, then you tighten your bolts, its probably bending the casting, then later forming a crack.
can confirm dowel is not an issue. maybe cover gasket surface uneven? is there a torque sequence? i get the larger bolts snug with a ratchet, the 1/4-20 pump bolts I snug with a nut driver screwdriver.
