| Author | Message | ||
| J R K (Kenyon)
Member Username: Kenyon Post Number: 560 Registered: 10-2002 |
Hey just buy this to sort the problem... http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=46104&item=2425006617 | ||
| Ulf Modig (Ulf308qv)
Junior Member Username: Ulf308qv Post Number: 78 Registered: 3-2001 |
Luuk, your problem sounds like typical transfer gear rattle like Billy mentioned. Transfer gear rattle (or clatter) will normally increase when: - the gearbox is really warm - the idling speed is low Try to locate the rattle with a stethoscope as suggested earlier. Ulf | ||
| Vincent (Vincent348)
Member Username: Vincent348 Post Number: 912 Registered: 4-2003 |
I went for a ride with a friend (mechanic) and we checked out my rattles. It seems like I have two separate one that sound similar. one, is due to needing upper suspension bushins on the right rear supension. two, is an exhaust back pressure dealy. When I rev to 3500 and let off the gas slowly you can feel the lack of exhaust out of the right hand side tips and hear the change in noise or lack of noise. He revved it and it was clear that as the rpm went down there was not pressure out of the exhaust until enough pressure built up to let it out. Perhaps a cat, didn't have this problem when I had the test pipes on. I learned a lot about rattle diagnosis tonight. | ||
| FABS (Caruso360)
Junior Member Username: Caruso360 Post Number: 56 Registered: 5-2003 |
On my 348 the rattle turned out to be the flywheel which was improperly turned at the machine shop. The flywheel was basically warped at a certain spot. The shop had to purchase a new flywheel and another install labor cost. No more rattle. | ||
| Luuk Uiterwijk (Luuk__annet)
Junior Member Username: Luuk__annet Post Number: 65 Registered: 7-2002 |
Jeff, I'll think your right but before purchasing a new FW I want to be sure that it is nothing else. Now I have to find me a mechanic stethescope and somebody ho knows how to work with it. Luuk | ||
| Jeff B. (Miltonian)
Member Username: Miltonian Post Number: 450 Registered: 12-2002 |
http://www.ferrarichat.com/discus/messages/112/252357.html?1058626442 See billybob's message of June 27,2003 9:58AM and my message of June 26, 2003 10:56PM. | ||
| Jeff B. (Miltonian)
Member Username: Miltonian Post Number: 448 Registered: 12-2002 |
Judging by the excessive wear seen in the pictures of the inside of your flywheel, I wouldn't be surprised if you simply have some rattling coming from the worn internal parts, as Billybob suggested a long time ago. Putting new grease in the flywheel doesn't compensate for worn out parts. If there was no evidence of metal debris in the transmission fluid, and the noise isn't excessive, personally I wouldn't worry about it. | ||
| Luuk Uiterwijk (Luuk__annet)
Junior Member Username: Luuk__annet Post Number: 64 Registered: 7-2002 |
I have to give it a rest for the coming 2,5 week because Monday I�m having holliday, after that I will disassemble again and try to find out watt is wrong .I will follow Billy bob�s advise. I drove today and I must say there where no problems it runs fine and I had no hot start problems. I�ll hope I have it all fixt before 25 august because we planted a factory tour then just as we did last year. It�s about 1500 Km until Marranello and 1500 Km back so the car must be in good shape then. Thanks all for your advice, Luuk | ||
| Vincent (Vincent348)
Member Username: Vincent348 Post Number: 868 Registered: 4-2003 |
Luuk, Mine idles at 1000rpm. I'm not sure whether to be really concerned about the rattle. The car shifts beautifully, and goes into second cold as well as hot. It could be a rattle in the exhaust. Billybob, A friend of mine has a set of mechanic's ears with four channels. Where do you think I should put the ears? Vincent. | ||
| Byron (Bmyth)
Member Username: Bmyth Post Number: 969 Registered: 10-2002 |
Luuk, Don't overlook that rattling. It's not something you want to ignore. I had the similar issue... turned out the pinion gear got stripped and bits and pieces of gears got ground up in my tranny. It wasn't until some pieces got caught in my synchros and I was stuck in gear on the freeway that I realized that something was really wrong. Follow BillyBob's advice here and do a little bit more diagnosis - you'll see that it will be well worth your efforts. my .02 Byron | ||
| Luuk Uiterwijk (Luuk__annet)
Junior Member Username: Luuk__annet Post Number: 62 Registered: 7-2002 |
Billy Bob, It is not the TO bearing I have replaced but the bearing at the end of the clutch/fw house. I was a must do job because I destroyed it by hammering it out the clutch/fw house. So it still can be the TO bearing, I made a tour today it look like the car is running just fine it could be that the rattle was there before I did the fw job but did not notice it because in the car you hardly hear it. When I�m stopping I�ll push the clutch so no rattle is heard. I do not mean that I am not worried about it but I don�t think it�s something to be real scared about. Vincent, What is the RPM with no throttle ?? 1000 or 1100 Rpm ??? Aren't you concerned about the rattle on your car ??? Thanks Luuk | ||
| Vincent (Vincent348)
Member Username: Vincent348 Post Number: 864 Registered: 4-2003 |
Funny, I have a rattle at 3000rpm when the engine is hot and I am not on the gas or just letting up. also noticed it happens on downhill left hand turns. Vincent. | ||
| billy bob (Fatbillybob)
Member Username: Fatbillybob Post Number: 304 Registered: 8-2002 |
Use a mechanic stethescope to isolate the location of the rattle before you disassemble anything. If you have a new T/O bearing in there that is not likely to be the problem. Possible problems are either cracked gears usually transfer or pinion gears. Sometimes a bad bearing. Soetimes the clutch shaft lockring comes loose causing slight misalignment of the transfer gears causing rattle. Sometimes the preload on the pinion shaft is not correct and you get a rattle from pinion drive gear moving under loads. You can adjust the idle from the accelerator wire that is just above the oil filter. There are 2 8mm nuts to adjust. | ||
| Luuk Uiterwijk (Luuk__annet)
Junior Member Username: Luuk__annet Post Number: 60 Registered: 7-2002 |
With the new bearing on it I still have the rattle I'm really disappointed The rattle does not occur when the engine is really cold, after starting it takes about two minutes for the rattle to occur. I'll think I will try to let the engine run without the TO on it (as Billy bob advised me) it means to reassemble again. What is the (I hope I use the right word) motionless or stationary RPM on my 348, I mean with no throttle at all. At 1100 RPM there is no rattle, only at 1000 RPM. If it is to low how can adjust it ? Any help will be much appreciated, Luuk | ||
| billy bob (Fatbillybob)
Member Username: Fatbillybob Post Number: 299 Registered: 8-2002 |
Sounds good. You should find out tomorrow upon your reassembly of the clutch. | ||
| Luuk Uiterwijk (Luuk__annet)
Junior Member Username: Luuk__annet Post Number: 56 Registered: 7-2002 |
Billy bob, I dropt the gear oil to inspect the drive gears it seem nothing wrong there all teeth where accounted for, I really think it's the bearing at the end of the clutch house because the rattle occurred after the FW job and it seems I was not careless enough with the bearing so now it's got play on it and at low RPM the hole clutch and FW are shaking on the axal. Tomorrow I should have the new bearing so I�ll get back here , thanks for your input,   Luuk | ||
| billy bob (Fatbillybob)
Member Username: Fatbillybob Post Number: 297 Registered: 8-2002 |
It is very difficult for the inexperienced to determine throwout bearing noise from transfer gear noise. The bellhouse comes off pretty easy. Take it off anf take off the throwout bearing. Put the bell house back in and start the car. If it rattles you have problems in the transfer gears. Before you do all that work drop the gear oil and look in the inspection plate. There are two drive gears at 90 degrees to each other. Look for broken teeth. If you see nothing here you can still have transfer gear problems. You will then have to remove the clutch shaft to inspect the transfer gears. email me if you get this far and I will give you some email help. | ||
| Luuk Uiterwijk (Luuk__annet)
Junior Member Username: Luuk__annet Post Number: 51 Registered: 7-2002 |
Hello, The rattle seems to be coming from the clutch house bearing it is a 3208A SKF bearing its got play on it and when I turn it I feel a slight rattle. I probably damaged it myself by disassembling the clutch house after a flywheel job. I now have to order a new bearing and hope the rattle is gone. I�ll get back on this after I have it all back together again. What is the max RPM of the bearing because type 3208A has different specifications. This is the number on the bearing 3208A-2RS2TN9 / C3HT22 ITALY SKF Luuk | ||
| Luuk Uiterwijk (Luuk__annet)
New member Username: Luuk__annet Post Number: 50 Registered: 7-2002 |
Billy bob, I have located the inspection plate but will not work on the car until next week I first will give the TO bearing a check and if that has no play I have to look further, what can I aspect to see underneath the inspection plate and what would be broke or loose what causes the rattle . Sorry for my crappy English but I don�t no what a pinion is. Did you ever seen play on a axal going in the gearbox ,how did you locate the problem and was it hard to fix? I would like some more info before I disassemble the car so I have more things to look for. Thnks Luuk | ||
| billy bob (Fatbillybob)
Member Username: Fatbillybob Post Number: 296 Registered: 8-2002 |
Could be gearbox transfer gears. Also dump the oil and check the pinion drive gear via the ispection plate. I've rebuilt several of these gearboxes now. | ||
| Luuk Uiterwijk (Luuk__annet)
New member Username: Luuk__annet Post Number: 49 Registered: 7-2002 |
Jeff, My car does not have catalytic converters but strait pipes I gave the muffler a good shake when it was of the car no rattle occurred thanks for the tip anyway, Luuk | ||
| Jeff B. (Miltonian)
Member Username: Miltonian Post Number: 434 Registered: 12-2002 |
On my 348, I had a very noticeable rattle, mostly at low RPM, that turned out to be coming from both of the catalytic converters. The element inside the converter housing was loose, you could slide it back and forth about 1/4". My fix was to drill a small hole in the housing, tap threads in the hole, and install a screw that pushes against the element, holding it in place. You have to remove the catalyst from the car (easy) to check it, locate the proper position to place the screw, and test for successful fit. It worked for me! | ||
| Luuk Uiterwijk (Luuk__annet)
New member Username: Luuk__annet Post Number: 48 Registered: 7-2002 |
JRK, I'll had the same tought , but my dealer me a bit afraid I'll get back on this, Thnks Luuk | ||
| J R K (Kenyon)
Member Username: Kenyon Post Number: 503 Registered: 10-2002 |
If it was the axal to the gearbox I would of thought you would have the noise continously while the axal is turning and whatever rpm. Only a thought. Good luck and let us know what the outcome is... | ||
| Luuk Uiterwijk (Luuk__annet)
New member Username: Luuk__annet Post Number: 47 Registered: 7-2002 |
Hello, After repack my Flywheel I still here a rattle as JRK point out to me it could by the TO bearing from the clutch my local Ferrari dealer informed my that it also could be play on the axis ho is going into the transmission/gear box a nut has come loose and it is unwise not to do the repair directly I�ll hope this is not so because he told my that it was a major work. I did not had the bearing be checked out because I�m on holiday right now so I�m going to disassemble the clutch next week and hope that it is the bearing and not the nut on the end of the axis. The rattle only occurs after the engine run for a few minutes and only below 1200 RPM. When I hold the clutch down the rattle is gone maybe this points out to me that it is the bearing and JRK is right.( I�ll hope so) Anybody out here maybe ever done something on the axis. Thanks for your input. Luuk |