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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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06-16-2021, 04:35 PM | #15 |
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Got under the car today. Everything is on there nice and good. Nothing loose. I tried hard take offs and I was able to get donuts and hard take offs no problem. First time driving the car hard. No crunching or slipping. I didn’t have problems til I go to hills again and I think it is clutch related. Under 2500rpm I was straight slipping or almost stalling on a hill and when it was slipping that’s when you hear that noise. If I go over 3000 rpm on a hill then the noise didn’t happen but clutch did slip a LOT. Then back on flat ground we are all good again right back to hard take offs and donuts slip free. This is getting more and more confusing. I want to add to this. Yes user error could play a roll, but not to this degree. Its weird. The noises I am hearing don't sound (to me) like the sort of thing that just easing off the clutch a little fast or slow would cause, and more over, why am I so affected by a few degrees incline?
Last edited by T_Squadrito; 06-17-2021 at 01:19 AM. |
06-18-2021, 10:23 AM | #16 | |
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06-18-2021, 03:29 PM | #17 | |
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I have since had 2 different friends in the car with me hear it from different places in the same region of the vihicle. One thought it was tire rub at first except I was going straight, then once I showed him it wasn't, he was like, yeah thats not good, but the thought it was coming from the wheel area. Another friend said its definitely in front towards the engine some where but hes not sure where and thought it was more towards the center of the vihicle than the sides, but he said it didnt sound like it was coming from the transmission, and I am inclined to agree that I don't believe its tha transmission given that its hapening well after getting in gear and getting moving. I am supposed to get it looked at on tuesday so hopefully they will be able to replicate the problem and give me a decent idea of what they think it is. My suspissions are narrowed down to: The clutch is slipping a little and its causing the bearings to knock around; or something suspension related; or possible the tensioner. Hopefully I will find out tuesday but I also hope maybe one of you all will have an idea to help narrow this down more. The more cross-referencing I can do the better. |
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06-18-2021, 09:52 PM | #18 | |
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The Following User Says Thank You to Dzmitry For This Useful Post: | T_Squadrito (06-19-2021) |
06-19-2021, 02:25 AM | #19 | |
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I should add that when they drained the fluids they said they found no metal shavings. Besides the fluid showing its age a bit they found no cause for alarm from the fluids alone, so that is a point for the transmission, but not definitive and also says nothing about the clutch. Last edited by T_Squadrito; 06-19-2021 at 02:54 AM. |
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06-19-2021, 05:34 PM | #20 |
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I just came to a huge realization. I don't think the clutch pedal adjustment is causing it, but I do think it has to do with it. In a way. So, I didn't have the problem all that noticeably until I adjusted my clutch pedal, but I didn't go anywhere near as far as I have seen some people go. I think the problem is the clutch, but I think it's not fully disengaging. Here's why I think that. It wasnt bad when it was just stupid long travel, but now that the travel is reduced even a little it is having a problem, and when I adjust it even a milimeter more, I have the problem all the time. I am going to double check and just be sure I dont have any leaks in the master or slave, but I am now very curious if the clutch is going bad and sticking a little, or if it is a fluid problem.
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The Following User Says Thank You to T_Squadrito For This Useful Post: | Dzmitry (06-19-2021) |
06-19-2021, 11:00 PM | #21 | |
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Sounds like you might be onto something with the clutch engagement thoughts. Very odd though that you would get such a loud, metal-like, crunching noise with a clutch problem. Or maybe I'm just not familiar enough with the potential sounds that could come out of that. @Ultramaroon I forget if you're the one with some expertise on this subject and would be able to share any thoughts. If not, my apologies for thy summoning. |
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06-19-2021, 11:17 PM | #22 | |
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The part that is putting me off is, I find so many people having the exact same sound but nothing that I am experiencing is ticking every box. Could be suspension related but I am not having any other related symptoms. could be axle related but no clicking. Could be exhaust related but no loose bolts. Could be scraping but nothing is misaligned behind the brakes. Could be motor mounts... havent actually looked into that one yet... Found someone with a similar issue on another car and it ended up being the fuel pump and what they were hearing was coming from the engine. Could be a warn-out belt and what I am hearing is the tensioner but again, only on hills? Could be transmission but it only happens on hils and turns but although I can, I struggle to simulate it on flat ground. When it does happen on flat ground it is way less of an issue. No apparent leaks. I noticed SOME issue before my adjustment but nothing serious and all other problems I thought I was having was easily remedied with the fluid change. This is a head scratcher. My thoughts about the clutch sticking is, if its getting stuck it jerks the car and as it jerks the car it could be something in the engine or momentarily causing something to be misaligned with the shaft. But that B is on there pretty good so who knows. At this point I am just trying to narrow down possibilities and try to give the mechanic an idea of my (cough) our thoughts given that there is so much to look at and so much it could be. It's not like I am trying to diagnose why the car makes a weird noise when I trun the wheel a certain way. Last edited by T_Squadrito; 06-20-2021 at 01:58 AM. |
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06-19-2021, 11:32 PM | #23 | |
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06-19-2021, 11:41 PM | #24 | |
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Last edited by T_Squadrito; 06-19-2021 at 11:54 PM. |
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06-19-2021, 11:55 PM | #25 | |
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"For the clutch to work efficiently, the right amount of play in the linkage between the clutch pedal and clutch fork (or release arm) is necessary. If not enough free play exists, a slipping clutch will result." I know you said you started to play around with it a bit to see how it behaves, have you made the attempt to adjust it back to stock? |
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06-20-2021, 12:03 AM | #26 | |
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Last edited by T_Squadrito; 06-20-2021 at 12:17 AM. |
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06-20-2021, 12:19 AM | #27 | |
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The Following User Says Thank You to Dzmitry For This Useful Post: | T_Squadrito (06-20-2021) |
06-20-2021, 01:47 AM | #28 | |
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Last edited by T_Squadrito; 06-20-2021 at 02:00 AM. |
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The Following User Says Thank You to T_Squadrito For This Useful Post: | Dzmitry (06-20-2021) |
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