Technical 1.4 Tjet Clutch with Slave Cylinder or Concentric Slave Cylinder?

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Technical 1.4 Tjet Clutch with Slave Cylinder or Concentric Slave Cylinder?

Eridanny

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Hi guys,

Last Saturday while I was parking I noticed that the clutch pedal maintained pressed to the floor even when I removed my foot from it. I needed to pull it using my hand so I could start the engine again but the pedal did the same. I took it to the garage and checked on this forum that there is thread to drain air from the slave cylinder that is located below the battery.

I'm not so sure if there was any change/upgrade to the cars Fiat sold in Mexico (by the way I'm in Mexico) but there is nothing shaped like that. I talked to the engineer and he told me that it could be using a Concentric Slave Cylinder instead.

My question is if anyone of you guys know if that is the case for Mexico /Latin America? or if there is any country using Concentric Slave Cylinder instead of just a Slave Cylinder?

This will be a huge difference on the cost of repair as the Slave Cylinder should be located outside the gearbox, therefore there is less time needed to do the repair/replacement than having a Concentric Slave Cylinder located INSIDE the gearbox.

Also, do you know if this Fiat Bravo uses parts from any other model or brand? like a Corsa or Astra maybe?

There was a time back in 2002 that Fiat had an agreement with General Motors and that could be the case to share spare parts.

This will be really helpful for me to repair my car and not replacing the complete clutch kit if there is no need.

CONCENTRIC SLAVE CYLINDER
http://www.shop4parts.co.uk/?name=store&op=Details&ProdID=3788&sku=49505

SLAVE CYLINDER
http://www.shop4parts.co.uk/?name=store&op=Details&ProdID=993&sku=183282


Thanks a lot!
 
SLAVE CYLINDER
55196190.jpg



CONCENTRIC SLAVE CYLINDER
55209342.jpg
 
Hi, yes the T-Jet 120 5 speed gearbox uses a concentric slave cylinder unfortunately. Im not sure but I'm guessing the 6 speed on the 150 T-jet also uses one? you'd be better off changing the clutch assembly as well as the concentric slave at same time whilst the gearbox is off.
 
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Thanks for your prompt reply Sweex.
Yep I thought the same, changing the whole clutch having the gearbox out but I was hoping to have slave cylinder to exchange in 45 minutes instead and saving a lot of money :p
 
The clutch slave/master cylinder not returning could be due to:

1) a cylinder failure
2) a clutch diaphragm spring failure

1) is easy to detect a) by loss of clutch/brake fluid or b) by continue loss of fluid when pressing the pedal and getting no resistance

2) if no loss of fluid, pedal can be pulled back manually, no resistance when pressing pedal and no loss of fluid, then a diaphragm/pressure plate spring failure is the most likely cause.

As annoying as it is with a modern internal to bell housing coaxial slave cylinder setup then one might as well have the clutch, slave cylinder and possibly the dual mass flywheel (if you have one) all replaced at the same time. Not cheap but also a risk if you don't have them replaced.
 
As annoying as it is with a modern internal to bell housing coaxial slave cylinder setup then one might as well have the clutch, slave cylinder and possibly the dual mass flywheel (if you have one) all replaced at the same time. Not cheap but also a risk if you don't have them replaced.

DMF should be tested when removed, won't necessarily need replacing, and at the cost, isn't something I'd recommend if it isn't faulty.
 
Testing a DMF can (not always) be a little bit of a miss and hit affair. All DMFs after say 10K miles show/have a little play in them. I'm not sure anybody has ever established a finite measurement as to what is acceptable/borderline/unacceptable measurement criteria.

With this in mind I would say if you have 40 to 50k miles on a DMF then replacement should be considered. It is also a good time to replace the DMF with a non DMF flywheel and matching clutch.

The aftermarket DMF replacement with more traditional setups is rapidly gaining traction due to poor DMF reliability. From what I have seen DMFs will last 3 to 5 years, just long enough to no be subject to a warranty claim, and after that who knows.

When my Croma 1.9 Multijet clutch cover plate assembly failed at 45,730 miles and 4 Years 7 months I had to have a new clutch. At that time the DMFs was basically on "on the way out". I inspected the DMF play myself and it was indeed excessive.

I don't 100% know about the Bravo but on the Croma to replace the clutch the whole engine subframe, steering rack and suspension have to be removed/separated to get the gearbox out. With such a labour intensive job the DMF replacement has to be seriously considered IMHO.

I don't have to hand prices for traditional replacement flywheel & clutch kits to replace original DMF setups but £200 to £300 including clutch is probably a fair estimate (I could more accurately check but don't see why I should) so replacement has to be seriously considered.

Why a DMF was/is fitted to a petrol engine will never cease to astound me. Blinking dumb marketing trend move as far as I can tell which we are all now paying for!
 
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hey guys,

I just picked up the car from the garage, they rebuilt the clutch and had to replace the concentric slave cylinder.
The car feels great, just a comment here, the pedal feels like before but just after you start to pull out the pedal, then the car starts moving. I was told by my father that the clutch pedal had to go all out so the car would move (as a part of testing job) but we have a doubt that this behavior is normal on a modern hydraulic clutch system?
 
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