Subarian Posted November 17, 2005 Share Posted November 17, 2005 I spent the day yesterday working on getting my little beast back on the road. I stripped off all the broken parts from the front end (wrecked last week) and stripped the corresponding parts from the donor car. I painted the donor parts to match, and then I set out to do some preventive maintenance. Since the bumper, grill, radiator, condensor, and associated parts were out of the way, I replaced the timing belts, resealed the oil pump, and got a new water pump for it. When I got the pump out of the box, I noticed it wasn't the right one, since it had a pressed-on pulley instead of a fan hub (I think it was for an EA 81.) I went back to Autozone, where I had gotten the pump, and brought my old one with me. They found one that looked like it, and I proceeded with my installation. After getting all the pieces on the engine, I started it up (no accesory belts installed) and it sounded just like it should. I put the radiator, condensor, grill, etc. back on. I installed the belts, fans, hoses, and filled the radiator. Then I started it up again. I was getting a terrible noise from the water pump. I looked closer, and it's about 1/2 inch shorter than the pump I took off, so the belts don't line up. I didn't realize there was more than one option for this pump. So here's what I'm thinking. Instead of draining the coolant, pulling off my A/C compressor, alternator, front timing covers, etc. and then pulling off the water pump, I could put longer studs in the hub and fab a 1/2 spacer to bring the pulley out to where it belongs. I realize it will put a little more strain on the bearing, but since it's a LLT warranty, if it makes it to the next timing belt change, I don't care. Link to comment Share on other sites More sharing options...
nipper Posted November 17, 2005 Share Posted November 17, 2005 That would work, just i too never heard of this before. Just watch your bel tension. Maybe a double pully is meant for this waterpump? nipper Link to comment Share on other sites More sharing options...
Caboobaroo Posted November 17, 2005 Share Posted November 17, 2005 now here's a problem a lot of newer Subaru owners can run into when it comes to replacing the waterpump on an EA82. There were 2 different sizes. You have to make sure you get the right one because one is 5mm shorter then the other. the longer one (110mm IIRC) has studs that screw into the waterpump for the pulley to bolt onto which also the fan bolts to as well. The other (105mm) has it where the fan actually bolts to the pulley itself instead of the same studs used to bolt the pulley on. I know there's people that can give you a better description of it and maybe try and search for it a little, but that seems to be the most obvious case here... Link to comment Share on other sites More sharing options...
Subarian Posted November 17, 2005 Author Share Posted November 17, 2005 It has a double pulley, but the pulley is completely backset, in the the mounting area is the front face of the pulley. The fan bolts to the studs, which run through the pulley. I don't think it would be difficult to fab a 5mm spacer and put longer studs in it. When I think about how much work I'd have to go through to replace the pump, that definitely sounds like a better option. BTW, I now have owned 10 Subarus, and this is the first time I ran into this. Link to comment Share on other sites More sharing options...
idosubaru Posted November 17, 2005 Share Posted November 17, 2005 sounds like you got the problem solved...would installing the water pump pulley "backwards" intentionally give you any more/less room to work with? Link to comment Share on other sites More sharing options...
zyewdall Posted November 17, 2005 Share Posted November 17, 2005 Yeah. They couldn't seem to get the right water pump for mine either. Took three times to get the right one. Apparently it's different if you have the factory AC vs the dealer AC, or no AC. The two different AC version are only 5 mm different but enough to make the belts not line up. Plus the studs are different, like Caboobaroo said. If you get the one for a car without any AC, it doesn't have any studs, because they didn't have an engine mounted fan, apparently. Link to comment Share on other sites More sharing options...
robm Posted November 17, 2005 Share Posted November 17, 2005 But you still need the studs to hold the pulley on to the hub of the water pump. Link to comment Share on other sites More sharing options...
zyewdall Posted November 17, 2005 Share Posted November 17, 2005 But you still need the studs to hold the pulley on to the hub of the water pump. Yeah, you need those, but on mine at least, those are not the same studs that hold the fan on. IIRC, the studs that hold the fan on are on the pulley, not the water pump. Or actually, I think there are bolts that go through the pulley to the water pump, then studs on the pulley for the fan. I don't know how subaru managed to make an car that had mostly interchangeable parts from 1985 till 1994, yet used three or four different water pumps in one year... Link to comment Share on other sites More sharing options...
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