My new SR/VQ swap is worrying me - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

CrudeTech · 09-19-2017, 09:19 PM

I just picked up my car from the shop who installed a CD009 behind the SR20 red top, and I'm worried about some details. The shop is not exactly local, so going back there is a hassle.

1. The clutch appears to be slightly engaged, even with the pedal all the way it. When I put the shifter in first from a dead stop, the car still creeps forward as the gear engages. Any way to adjust the pedal? Is there something else going on with the clutch setup?

2. The clutch pedal action is smooth when the car is off, but not when I turn the car on. It almost feels like there's some rubbing on rubber going on. At least that's what it feels like.

3. The transmission itself is loud. I'm guessing it's because of the sizeable gears and the kinda-high mileage. Correct me if I'm wrong.

4. The car has a bad vibration that starts as soon as I go over 115 km/h. I'm thinking driveshaft shake. It's a one piece, so I was expecting vibrations, but it doesn't feel normal to me. Maybe it's out of balance. Anything else I should look into?

Any help, input or advice would be greatly appreciated.

DJPimpFlex · 09-19-2017, 09:45 PM

This is all no good I'm sorry to say. I have a VQ s13 and everything is smooth as butter. Try bleeding your clutch a bit more and double check that all the fittings are tight. The vibration is scary. I would have the driveshaft balanced. There is probably someone local to you that can check it.

Edit: Also, what fluid is in the transmission? That might help with the gear noise.

CrudeTech · 09-19-2017, 09:51 PM

The transmission was filled with fresh Total gear oil

blkvrtswp · 09-20-2017, 09:17 AM

#1 is clutch pedal adjustment, tedious but easy. Check FSM procedure.

CrudeTech · 09-20-2017, 12:47 PM

1,2,3 are less critical. The driveline vibration the important one here.

But yeah, I'll try and adjust the pedal on my next day off. Not that worried about that one.

RalliartRsX · 09-20-2017, 12:55 PM

Your TOB bearing may not be the correct size or the clutch arm is out of adjustment. What clutch setup are you using??

TheRealSy90 · 09-20-2017, 05:46 PM

CD transmissions are also just noisy. It's just more evident in an s13 compared to a Z33 with all their sound deadening and double firewall etc.

CrudeTech · 09-20-2017, 06:29 PM

The clutch engagement is getting better after some minor adjustment. What a shitty place to work in though.

I spoke with the shop that did the swap. They did not notice the vibration issue, because they never went above 110 km/h during their road test since 110 km/h is the accepted speed on Quebec's highways.

The driveshaft is supposed to have been balanced twice, and the shop confirmed that the driveline angles were checked and double checked.

They recommended that I get the car aligned properly, and the tires balanced. I'm thinking my XXRs (premium shit right there) might not be round anymore. After all, Quebec roads are absolute thrash.

On a related sidenote, has anyone heard of 720Form wheels. The website talks about flow forming. If the XXRs are bent (probably), then I'm thinking of upgrading the wheels, unless fixing them is possible and cheap.

CrudeTech · 09-20-2017, 06:31 PM

Quote:

Originally Posted by RalliartRsX

Your TOB bearing may not be the correct size or the clutch arm is out of adjustment. What clutch setup are you using??

The clutch is a bully Stage 3 for the SR20 motor. It's a full disk with kevlar on both sides. I'm wondering if my car came with a clutch damper. The car is a JDM S13 180SX with a factory SR20DET red top.

CrudeTech · 10-11-2017, 12:28 AM

Status update:

The clutch is now disengaging properly after a quick rod adjustment and a thorough clutch flush/bleed.

Because of that, the shift quality is more than I could ever expect from a definitely-not-new transmission.

As for the vibration, it's still there, but with a slight improvement after the driveshaft was balanced properly.

I noticed the vibration gets real bad if I go in 5th. Weird.

canadians14sr20det · 10-22-2018, 01:58 PM

Quote:

Originally Posted by CrudeTech

Status update:

The clutch is now disengaging properly after a quick rod adjustment and a thorough clutch flush/bleed.

Because of that, the shift quality is more than I could ever expect from a definitely-not-new transmission.

As for the vibration, it's still there, but with a slight improvement after the driveshaft was balanced properly.

I noticed the vibration gets real bad if I go in 5th. Weird.

Did you ever figure this out? I've been fighting this for way too long: http://zilvia.net/f/showthread.php?t=627546

CrudeTech · 10-22-2018, 02:39 PM

I didn't figure it out. I switched to a softer trans mount. I'm pretty that the transmission has some worn bearings creating odd vibrations.

09-19-2017, 09:45 PM	#2
DJPimpFlex Post Whore! Join Date: Jan 2004 Location: Rohnert Park, CA Age: 38 Posts: 6,158 Trader Rating: (115) Rides Gallery: DJPimpFlex Feedback Score: 115 reviews	This is all no good I'm sorry to say. I have a VQ s13 and everything is smooth as butter. Try bleeding your clutch a bit more and double check that all the fittings are tight. The vibration is scary. I would have the driveshaft balanced. There is probably someone local to you that can check it. Edit: Also, what fluid is in the transmission? That might help with the gear noise. __________________

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09-19-2017, 09:19 PM	#1
CrudeTech Join Date: Mar 2016 Location: Ottawa, Canada Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	My new SR/VQ swap is worrying me I just picked up my car from the shop who installed a CD009 behind the SR20 red top, and I'm worried about some details. The shop is not exactly local, so going back there is a hassle. 1. The clutch appears to be slightly engaged, even with the pedal all the way it. When I put the shifter in first from a dead stop, the car still creeps forward as the gear engages. Any way to adjust the pedal? Is there something else going on with the clutch setup? 2. The clutch pedal action is smooth when the car is off, but not when I turn the car on. It almost feels like there's some rubbing on rubber going on. At least that's what it feels like. 3. The transmission itself is loud. I'm guessing it's because of the sizeable gears and the kinda-high mileage. Correct me if I'm wrong. 4. The car has a bad vibration that starts as soon as I go over 115 km/h. I'm thinking driveshaft shake. It's a one piece, so I was expecting vibrations, but it doesn't feel normal to me. Maybe it's out of balance. Anything else I should look into? Any help, input or advice would be greatly appreciated.

09-19-2017, 09:51 PM	#3
CrudeTech Join Date: Mar 2016 Location: Ottawa, Canada Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	The transmission was filled with fresh Total gear oil

09-20-2017, 09:17 AM	#4
blkvrtswp Zilvia Addict Join Date: Oct 2012 Location: NY Posts: 691 Trader Rating: (9) Feedback Score: 9 reviews	#1 is clutch pedal adjustment, tedious but easy. Check FSM procedure.

09-20-2017, 12:47 PM	#5
CrudeTech Join Date: Mar 2016 Location: Ottawa, Canada Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	1,2,3 are less critical. The driveline vibration the important one here. But yeah, I'll try and adjust the pedal on my next day off. Not that worried about that one.

09-20-2017, 12:55 PM	#6
RalliartRsX Post Whore! Join Date: Apr 2006 Location: Maryland Posts: 4,791 Trader Rating: (32) Feedback Score: 32 reviews	Your TOB bearing may not be the correct size or the clutch arm is out of adjustment. What clutch setup are you using??

09-20-2017, 06:29 PM	#8
CrudeTech Join Date: Mar 2016 Location: Ottawa, Canada Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	The clutch engagement is getting better after some minor adjustment. What a shitty place to work in though. I spoke with the shop that did the swap. They did not notice the vibration issue, because they never went above 110 km/h during their road test since 110 km/h is the accepted speed on Quebec's highways. The driveshaft is supposed to have been balanced twice, and the shop confirmed that the driveline angles were checked and double checked. They recommended that I get the car aligned properly, and the tires balanced. I'm thinking my XXRs (premium shit right there) might not be round anymore. After all, Quebec roads are absolute thrash. On a related sidenote, has anyone heard of 720Form wheels. The website talks about flow forming. If the XXRs are bent (probably), then I'm thinking of upgrading the wheels, unless fixing them is possible and cheap.

10-11-2017, 12:28 AM	#10
CrudeTech Join Date: Mar 2016 Location: Ottawa, Canada Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	Status update: The clutch is now disengaging properly after a quick rod adjustment and a thorough clutch flush/bleed. Because of that, the shift quality is more than I could ever expect from a definitely-not-new transmission. As for the vibration, it's still there, but with a slight improvement after the driveshaft was balanced properly. I noticed the vibration gets real bad if I go in 5th. Weird.

10-22-2018, 02:39 PM	#12
CrudeTech Join Date: Mar 2016 Location: Ottawa, Canada Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	I didn't figure it out. I switched to a softer trans mount. I'm pretty that the transmission has some worn bearings creating odd vibrations.