Alternator belt, pulley and bearings - questions
09-03-14, 05:19 AM
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Alternator belt, pulley and bearings - questions
Hi all
Note: no air pump > belt just drives alternator and water pump.
After a good hoon in the weekend I noticed a lot of rubber on the alternator. I knew the belt was at the adjuster limit and was getting a bit slack. However after removing the belt I see the alternator pulley does not spin true and the bearings squeak a little in the drive direction.
1) Anyone know of any other common vehicles I can get a pulley off with the same shaft size and diameter while being 5 rib?
2) Anyone have a part number for the bearings in the alternator? I might as well do these while in this area.
3) What belt length do people use to drive just alternator and water pump (assume factory 5 rib type)? Mine is 780mm so I assume it was a 775mm as new (previous owner would have installed it). The local shop can only do me a 775mm or 735mm and order a 740mm. 775mm is obviously almost at the limit to start with. 735 is way too short and 740 will be too. I expect we need around 760mm to be in the middle of the adjustment range.
I suspect this is what is on my car, looks the same:
http://www.ebay.com/itm/JAPSPEED-MAZDA-RX7-FD3S-92-01-LIGHTWEIGHT-ALLOY-ALTERNATOR-AND-TENSION-PULLEYS-/160755730902?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item256dc9c9d6
I also noticed the water pump is stamped 2010. This car has done very few ks since then - I have done more since March. The engine has fresh sealant throughout and certainly has not done many ks even though I know it was from another car. Bearings in the water pump don't seem to have lasted long... pretty easy job to replace I expect?
Thanks in advance
Note: no air pump > belt just drives alternator and water pump.
After a good hoon in the weekend I noticed a lot of rubber on the alternator. I knew the belt was at the adjuster limit and was getting a bit slack. However after removing the belt I see the alternator pulley does not spin true and the bearings squeak a little in the drive direction.
1) Anyone know of any other common vehicles I can get a pulley off with the same shaft size and diameter while being 5 rib?
2) Anyone have a part number for the bearings in the alternator? I might as well do these while in this area.
3) What belt length do people use to drive just alternator and water pump (assume factory 5 rib type)? Mine is 780mm so I assume it was a 775mm as new (previous owner would have installed it). The local shop can only do me a 775mm or 735mm and order a 740mm. 775mm is obviously almost at the limit to start with. 735 is way too short and 740 will be too. I expect we need around 760mm to be in the middle of the adjustment range.
I suspect this is what is on my car, looks the same:
http://www.ebay.com/itm/JAPSPEED-MAZDA-RX7-FD3S-92-01-LIGHTWEIGHT-ALLOY-ALTERNATOR-AND-TENSION-PULLEYS-/160755730902?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item256dc9c9d6
I also noticed the water pump is stamped 2010. This car has done very few ks since then - I have done more since March. The engine has fresh sealant throughout and certainly has not done many ks even though I know it was from another car. Bearings in the water pump don't seem to have lasted long... pretty easy job to replace I expect?
Thanks in advance
09-03-14, 06:05 AM
#2
That is the Greddy style smog pump elimination kit uses a 780mm (belt #3) Pulleys & Belts (93+ RX-7)
If you want to stop wearing out bearings in the water pump, alternator and engine..install an idler from the same page.
If you want to stop wearing out bearings in the water pump, alternator and engine..install an idler from the same page.
09-03-14, 02:44 PM
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Ok so it is saying 780 is right for underdrive wp underdrive alt and stock e pulleys. However I know that is a bit loose and at the limit of adjustment.
Maybe this implies it should be looser than factory spec when air pump is deleted?
Obviously I need to fix the warped alt pulley.
You imply that with additional idler I will even up the force on the wp and I figure also e pulley. Dont see how it would effect the alternator pulley though.
I think my large hairdryer is probably in the way but need to check.
Maybe this implies it should be looser than factory spec when air pump is deleted?
Obviously I need to fix the warped alt pulley.
You imply that with additional idler I will even up the force on the wp and I figure also e pulley. Dont see how it would effect the alternator pulley though.
I think my large hairdryer is probably in the way but need to check.
09-03-14, 02:51 PM
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Ok so it is saying 780 is right for underdrive wp underdrive alt and stock e pulleys. However I know that is a bit loose and at the limit of adjustment.
Maybe this implies it should be looser than factory spec when air pump is deleted?
Obviously I need to fix the warped alt pulley.
You imply that with additional idler I will even up the force on the wp and I figure also e pulley. Dont see how it would effect the alternator pulley though.
I think my large hairdryer is probably in the way but need to check.
Maybe this implies it should be looser than factory spec when air pump is deleted?
Obviously I need to fix the warped alt pulley.
You imply that with additional idler I will even up the force on the wp and I figure also e pulley. Dont see how it would effect the alternator pulley though.
I think my large hairdryer is probably in the way but need to check.
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