| Author |
Message |
Tommy Anastasiou (Tommya)
Junior Member
Username: Tommya
Post Number: 106
Registered: 10-2002
| | Posted on Thursday, May 29, 2003 - 6:12 pm: | |
Steve,
Finally I changed the tensioner bearings today. It was a 15 minute job for both sides. The type of pulley that I have is the one with the raised edge. What I did was shave the raised edge from one side just enough to clear the bearing. Using a press ( 20 ton ) pressed the old bearing out from the side with the edge. Pressed in the new until bottomed on the edge. Some have suggested using some locktite to secure. I didn't and I'm 100% sure that I will NOT regret it. With the 20 ton press it took some effort to fit. That bearing is not going anywhere.
Good luck.
|
Paul Jeffery (Peajay)
New member
Username: Peajay
Post Number: 44
Registered: 4-2002
| | Posted on Monday, May 19, 2003 - 6:13 am: | |
I may be interested in getting some bearings also, in the past I have found it quite easy to get a bearing manufacturer to give an equivalent bearing, but of course you do need a part number to start from. Buying direct from the manufacturer or a bearing wholesaler can give deep discounts also. Is the general opinion that this sealed bearing is as delivered by the bearing manufacturer, or is there a secondary "Ferrari specific" feature applied ? |
Tommy Anastasiou (Tommya)
Junior Member
Username: Tommya
Post Number: 105
Registered: 10-2002
| | Posted on Sunday, May 18, 2003 - 9:53 pm: | |
Hans,
When I inquired about them 3 months ago the price was $25 with the SKF #. I didn't get them than and things changed 3 weeks ago. I paid $45 just for the bearing itself.
What brand name bearing did you get and part # ?? |
Hans E. Hansen (4re_gt4)
Intermediate Member
Username: 4re_gt4
Post Number: 1306
Registered: 4-2002
| | Posted on Saturday, May 17, 2003 - 6:17 pm: | |
Tommy: The brand was SKF, and it was the complete assy. I'll have to dig out the receipt, but I *think* they were $59 ea. |
Steve (Steve)
Member
Username: Steve
Post Number: 374
Registered: 2-2001
| | Posted on Saturday, May 17, 2003 - 3:17 pm: | |
Verell I got you. I think you ar right on. I don't know if I'll try to take them apart because they only have 12,000 miles on them but being I just did a WP I am doing the valve adjustment and new belts/bearings to finish it up. This way I'll have another 30K miles before I'll need to take it apart again. I'm just starting the carb. retune process this week end. |
Verell Boaen (Verell)
Member
Username: Verell
Post Number: 739
Registered: 5-2001
| | Posted on Saturday, May 17, 2003 - 2:08 pm: | |
Steve,
I took a good look at my old bearings a while back. The bearings are retained by L shaped rings that are pressed into place against the bearingwith the bottom of the Ls outwards. I think this is what you're describing as a 'peened edge'.
I understand that there's also a raised edge, or ring washer in a groove (both have been described) in the center of the outer ring so the bearings can't be pressed thru it.
It looked like disassembly would involve clamping/supporting the ring somehow & using a blind bearing puller to pull one bearing & L ring out. Once one is out, you're home free.
|
Tommy Anastasiou (Tommya)
Junior Member
Username: Tommya
Post Number: 104
Registered: 10-2002
| | Posted on Saturday, May 17, 2003 - 8:49 am: | |
Steve,
on my 82 308 the A/C bearing is pressed on to the pulley.
Hans,
What kind of bearing did they sell you ?? |
Steve (Steve)
Member
Username: Steve
Post Number: 373
Registered: 2-2001
| | Posted on Saturday, May 17, 2003 - 7:35 am: | |
Tommy let me know how to remove and replace these bearings. I'm not going to do this but just was interested in how it was done. From what I see it looks like the metal is "peened" over after the bearings are pressed in. Unlike the AC belt tensioner bearings which are held in with a snapring. Also it looks fairly easy to machine the outer pulley out of alum. like Nick does.Looks like a simple job so I guess I don't understand what would drive the $150 cost.Just asking. |
Hans E. Hansen (4re_gt4)
Intermediate Member
Username: 4re_gt4
Post Number: 1299
Registered: 4-2002
| | Posted on Friday, May 16, 2003 - 11:48 pm: | |
I bought my bearings from George Evans. I *think* the prices were ballpark, maybe better. Worth a call. They were the complete assy, with the outside roller, etc. I thought the prices were reasonable, as everything else on the car requires a second mortgage. |
Tommy Anastasiou (Tommya)
Junior Member
Username: Tommya
Post Number: 103
Registered: 10-2002
| | Posted on Friday, May 16, 2003 - 9:10 pm: | |
Steve,
if you look at previous posts the bearings can be changed. I will be doing this next week.
The argument is on the type of bearing. Some have used the SKF 3205 bearing. (did not update on the performance of the bearing). The actual bearing # is SKF 617546A/HT22. SKF claims that this a complete assy but it's only the bearing. To make things more confusing this number does not exist anymore. I just bought a few last week in Italy. The bearing is being marketed by VKM and doubled the price of it. SKF box VKM number. The # stamped on the bearing is the same as the original. I will let you know how I made out with it. |
Steve (Steve)
Member
Username: Steve
Post Number: 372
Registered: 2-2001
| | Posted on Friday, May 16, 2003 - 4:58 pm: | |
Just some general info here but I just got a new set of timing belts for the 77 and they are made by TRW pt # 48-14001 and the bearings are SKF but they have been pressed in and rolled over so you can't change them. As for the Alt. belt it is a Gates pt # 7M973 USA 2G FYI |