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wasz
Sepang


Joined: 28 Dec 2012
Posts: 2904


1999 Porsche 996 Carrera 2

PostPosted: Tue Jan 22, 2019 11:32 am    Post subject: Reply with quote

GMG wrote:
...interesting and Iain after my recent engine rebuild and replacement over gearbox brake lines replacement the brakes were bled (takijg litres of fluid) however an inner rear drivers side nipple sheared thus this couldn't be bled...should I worry that air might be trapped in this short brake line leading to a less than perfect brake feel?

In other words do I need to rush to remove caliper and have a new bleed nipple fitted?


If the line to that caliper was renewed there is a chance of air in that side of the caliper. I would get it sorted.

Don't let anyone try to drill it out in place. I took my caliper to an old school engineering shop where it was mounted in the mill, drilled out, thread cleaned up and a new nipple seat cut. Cost £50 and took less than an hour.

These steel nipples in alloy calipers are so easy to make a mess of.

When removing the caliper you might find the line nut on the caliper or flexy well stuck too.....but if that line to the caliper has been replaced then it will come undone fine, just don't let the fluid drain down, you can stick an old bleed nipple in the end of the flexi to block it off.
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Stoo.c
Monza


Joined: 07 Apr 2014
Posts: 205
Location: Hertfordshire


PostPosted: Wed Jan 23, 2019 2:06 pm    Post subject: Reply with quote

A decent 'basic' service is still so much more than just a 'stamp in the book'. At a cheap backstreet garage then yes its probably just an oil and filter change but its very different at a quality specialist. One thing I didnt consider which my indy did as part of the most basic service was to use PIWIS to check cam deviation (which I cant do given I dont have PIWIS) and the peace of mind it gave me to be told I had 0 degree deviation between both banks and the crank was really great for me to hear (later engine so cam sensor on each bank). He also pressure tested my coolant system - again great to know that I dont have any slow leaks. Despite knowing my car inside out, it gave me great confidence in its condition - its a nice feeling.
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wasz
Sepang


Joined: 28 Dec 2012
Posts: 2904


1999 Porsche 996 Carrera 2

PostPosted: Wed Jan 23, 2019 3:01 pm    Post subject: Reply with quote

Stoo.c wrote:
A decent 'basic' service is still so much more than just a 'stamp in the book'. At a cheap backstreet garage then yes its probably just an oil and filter change but its very different at a quality specialist. One thing I didnt consider which my indy did as part of the most basic service was to use PIWIS to check cam deviation (which I cant do given I dont have PIWIS) and the peace of mind it gave me to be told I had 0 degree deviation between both banks and the crank was really great for me to hear (later engine so cam sensor on each bank). He also pressure tested my coolant system - again great to know that I dont have any slow leaks. Despite knowing my car inside out, it gave me great confidence in its condition - its a nice feeling.


Thumb

I check my cam deviation figure (3.4 so can only see one side) with durametric.

Some indies are better than others, but all should know the common issues on these cars and be able to flag anything at service time.
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6320
Location: Brighton


PostPosted: Wed Jan 23, 2019 8:17 pm    Post subject: Reply with quote

GMG wrote:
...interesting and Iain after my recent engine rebuild and replacement over gearbox brake lines replacement the brakes were bled (takijg litres of fluid) however an inner rear drivers side nipple sheared thus this couldn't be bled...should I worry that air might be trapped in this short brake line leading to a less than perfect brake feel?

In other words do I need to rush to remove caliper and have a new bleed nipple fitted?


Sorry .. i missed this ..

I tend to find that not bleeding both sides of a caliper will leave air in the system .. but this is pretty obvious .. its a very soft pedal .. if the pedal feels the same as it always has then its ok , unusual but ok .

Ok so a seized nipple .. they are not always siezed .. i give it a certain amount to try and undo .. after that i flag it as possibly seized .. it may come undone with more force .. but on a one day service the last thing you want to do is snap a bleed nipple .

garages will get authority before continuing .. you may be lucky .. if so i would recomend asking them to replace the nipple ... if i had 6 i thought were seized .. then 2 will snap.

Again its not uncomon for them to come undone a bit but then seize .. you can often get them tight enough to seal .. but you will be in trouble if you try to replace them .. it will drag the threads out with the nipple .

For the other comments .. different indys do different things .. i like to browse through the various settings for x2 reasons ..

One being i need to remember the settings for a good car with no faults .. its kinda refreshing my memory .. each model is different so we need to stay on top of it .

Second is obvioulsly looking for issues .

Actually there is a third .. im weird and like looking at the figures Floor

Cam deviation will flag a fault code once at 11 degrees .. but with only one sensor on the early cars its not a real check of chain stretch .. which is still pretty rare to be fair .
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