(Purchased)WTB-All Hardware for Mounting Tensioner Pulley
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CnC79X19
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Ics19
belle macchine!
As mentioned further back I think, stock bearings on a 1500 are 56mm and 29mm wide, whereas a stock 1300 are 60mm and 27mm wide. What were the widths of your ones?
What was the size of the 1300 bearing that was rubbing? The bracket is the correct part for a 1300, 4320894.
Dr.Jeff
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As was just stated by "Ics19", the OD of a 1300 bearing is bigger than the OD of a 1500 bearing. The belts are also different lengths. That is why a 1300 bearing is sometimes used on a 1500 engine when the head has been heavily milled. The milled head sits lower to the block, making the timing belt too long. So the larger diameter (1300) bearing takes up that slack.
Half of the inner race is still on one of those carriers (the one off the '74). Some of these double row bearings have two inner races, one for each row of ball bearings. Once that is removed it will look like the other one (1500). The 1300 carrier may be a little bit narrower (at the round center portion that the bearing mounts on to - picture #3), which would correspond with the narrower 1300 bearing width. However as far as I know that would not preclude using a 1500 bearing on a 1300 carrier, there is enough length to securely mount it.
The difference in widths of the bearings themselves is of no consequence. The original 1500 bearing was wider, but it really did not need to be. If you look at a bunch of different brands of replacement bearings, you will find lots of variance in widths. So long as it is wide enough for the timing belt (which is much narrower) then it is fine. I suspect the only reason the original 1500 bearing was wider had to do with what was available in the desired diameter. I believe both belts (1300 and 1500) are the same width.
I'm not sure why the 1300 carrier was ground away like that. Either bearing should fit and nothing else would come close to that area that I can think of.
Cliff, in your case just use all of the 1500 components since you have them (including the smaller diameter bearing), on your 1500 engine.
In response to Ics19's question about the 1300 bearing that was rubbing. That was not Cliff but Mike, and it was a 1500 bearing that was rubbing (as I understood it). That's why it was very odd.
Half of the inner race is still on one of those carriers (the one off the '74). Some of these double row bearings have two inner races, one for each row of ball bearings. Once that is removed it will look like the other one (1500). The 1300 carrier may be a little bit narrower (at the round center portion that the bearing mounts on to - picture #3), which would correspond with the narrower 1300 bearing width. However as far as I know that would not preclude using a 1500 bearing on a 1300 carrier, there is enough length to securely mount it.
The difference in widths of the bearings themselves is of no consequence. The original 1500 bearing was wider, but it really did not need to be. If you look at a bunch of different brands of replacement bearings, you will find lots of variance in widths. So long as it is wide enough for the timing belt (which is much narrower) then it is fine. I suspect the only reason the original 1500 bearing was wider had to do with what was available in the desired diameter. I believe both belts (1300 and 1500) are the same width.
I'm not sure why the 1300 carrier was ground away like that. Either bearing should fit and nothing else would come close to that area that I can think of.
Cliff, in your case just use all of the 1500 components since you have them (including the smaller diameter bearing), on your 1500 engine.
In response to Ics19's question about the 1300 bearing that was rubbing. That was not Cliff but Mike, and it was a 1500 bearing that was rubbing (as I understood it). That's why it was very odd.
Dr.Jeff
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Cliff, is the third bearing (far left in picture #7) the same diameter (outside) as the 1300 bearing? Because it looks like you have two 1300 bearings and one 1500 (new?) bearing. Not sure where the all the bearings came from, but for your engine you should need the smaller diameter 1500 type.
CnC79X19
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Bought the new one 1500 from Matt at Midwest Doc, and the 1300 with the hacked up tensioner bracket was from the 74 parts car (1300 with shaved cambox). Final 4mm in dismeter larger than the new one is what we removed from our 1500 originally. My question is: can I use this tensioner bracket (even if it is the same dimensions as the 1300 although numberless), along with the new bearing from Matt?
Dr.Jeff
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Yes. I assume you mean the tensioner bracket (carrier) that isn't ground down. That's the one I'd use.
The final bearing (4mm larger) is likely a 1300 unit installed on the 1500 with a milled head, as I described earlier. Regardless, ignore everything but the new 1500 bearing and the non-ground carrier. Use those.
The final bearing (4mm larger) is likely a 1300 unit installed on the 1500 with a milled head, as I described earlier. Regardless, ignore everything but the new 1500 bearing and the non-ground carrier. Use those.
CnC79X19
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Thanks Doc, We'll do that.
It is slightly larger than the new 1500 from Matt but considerably smaller than the 1300 from the 74 parts car[ ATTACH=full]25153[/ATTACH]
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Dr.Jeff
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That's interesting. I've found some generic bearings (double row, deep groove, roller type, just like the stock one) that have the same ID and width but a larger OD compared to the stock bearing. That may be what it is. Looks like you are good though.
CnC79X19
True Classic
We're just taking your advice and sticking to the un-ground bearing housing bracket and new bearing