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Low mileage and bad clutch?

Old 03-13-2019, 06:17 AM
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Zester
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Default Low mileage and bad clutch?

Hi guys. I am in for a car with very low mileage - 17.000 miles ('08, VQ35HR). The issue is that clutch bites extremely high, basicly when you let the pedal go. The clutch is not slipping, I haven't noticed it. If the clutch is gone obviously it had a hard life. Was it either driven in the city a lot or it was beat as hell. Would hard starts relate to this symptoms? Or the problem could lie elsewhere?
My worry is that even DMF can be bad. I am in the process of buying this car and I am looking at a hefty bill.

EDIT: Darn it. This should be moved to 350Z arena :/ sorry

Last edited by Zester; 03-13-2019 at 06:19 AM. Reason: Should be moved to 305Z
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Old 03-13-2019, 06:22 AM
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If the clutch pickup point has changed then you need to bleed the system, if it's just high then you can get your head under the dash and adjust it at the pedal.
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Old 03-13-2019, 06:59 AM
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It's more than just high, it's allll the way up. Basicly the last 1/2 inch when you release the pedal.
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Old 03-13-2019, 07:07 AM
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Has it always been there? Like I said, you can very easily adjust the pickup point at the pedal. I'm not sure what the pedal / master / slave ratios are, but the the difference between a brand new and worn out clutch is a few mm, so you probably wouldn't notice it in the pedal.
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Old 03-13-2019, 07:21 AM
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travlee
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to me the nissan always had a high release, i wouldnt adjust it via the rod to much, you could lead to not fully engaging or something

if you dont like the engagement point, get the rjm pedal
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Old 03-13-2019, 07:23 AM
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I am looking to buy this car and I don't really know how the clutch was till now. The seller said yes, the clutch should probably be replaced - he's not even sure about it. Be aware that the car is stock, owned by the 1st owner, older gentleman who indeed have a lead foot. And we're talking about 17.000 miles the car has. That's basicly new car/clutch.
I know the clutch can be tricky on these cars. I searched through this forum and some others, also googled but couldn't find anything on this matter. If it's only bleeding that should be performed than it's good. If this is a destroyed clutch which consequently damaged the DMF too I cannot know. But I would be in for a fat bill.
Does riding the clutch and clutch dumping manifest as the same symptom of worn clutch?

Last edited by Zester; 03-13-2019 at 07:24 AM.
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Old 03-13-2019, 07:34 AM
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My mistake, didn't read your first post carefully enough and didn't realize this wasn't your car. Like Trav said the release on these cars has always been pretty high, and 17k is really low for the clutch to be worn out. Easiest way to tell if the clutch is slipping is to get up to freeway speeds, put it in 6th gear, then press the gas as if to pass while watching the tach (don't floor it as that will lug the engine). If the clutch is worn, the revs will jump up without a major change in speed, then they will come back down as you begin to accelerate.

Once you get the car, I wouldn't be too concerned with over-adjusting the pedal - if you adjust it too far it'll be pretty obvious (it would be tough to get in to gear with the engine running), and you'd just need to back your adjustment off a bit.
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Old 03-13-2019, 07:44 AM
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just note.... plan on dropping the trans to replace the csc eventually. mine first went out at 36k miles, and then again at just shy of 50k (replaced with oem). spend the money and do the zspeed setup
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Old 03-13-2019, 07:49 AM
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​​​​​'08 Z with HR... notoriously bad clutch actuation. Partly due to concentric slave cylinder leaking (and Nissan never was held accountable for it....psh). Pedal is also way too light for serious work as well.

While this is undesirable, take heart that it’s all easily remedied.... In addition to the RJM pedal that Travis mentions, when replacing the clutch, swap out the slave for the Z-Speed Performance heavy duty unit OR install their CMAK kit (conversion to external slave). EDIT: apparently Trav was quicker on the draw on this one too. Laff....

Once done, you’ll have a great low mileage Z!


Last edited by MicVelo; 03-13-2019 at 11:18 AM.
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Old 03-13-2019, 09:46 AM
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I would be concerned if a clutch was bad at 17,000 miles - someone didn't know how to drive a MT! Believe it or not, my 03 has 163,000 miles on it and still on the original clutch, and I used to track it and drive it pretty hard at other times, including many trips to ZDayZ, before getting my 90 TT 5 years ago, when it became just a daily commuter car. But, not sure yours is bad anyway, do that 6th speed test and see if its slipping - you can do that on a hill too and maybe not even 6th gear - just low RPMS and see if it accelerates.
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Old 03-14-2019, 01:12 PM
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My 07 HR had a recall ( in Canada) and the CSC was replaced. It now has 99,000 KMs or 60,000 miles with no issues.
You could ask the owner if he had this recall.
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Old 03-15-2019, 04:45 AM
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Zester
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Thanks for input. I am aware of all the things mentioned here. As said before I went through this forum and others.
The thing that bothers me is not knowing why this would happen. I am quite solid on destroyed clutch. And I cannot imagine what was happening with the car since it looks really nice. Never resprayed. And I don't get any answers from the seller. He's saying because these are sports cars (bull ****), that this happens because someone is riding the clutch, but he's not giving any explanation why this happened on his car. He simply "doesn't know". Would this relate to heavy clutch abuse?
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Old 03-15-2019, 06:17 AM
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It's a used car.....its not going to be perfect, use the clutch as a bargaining tool to get price down
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