996 timing belt??
Discussion
I have had my 1999 carrera 4 for about 6 months & enjoying it loads, bit confused over servicing, when i brought the car , the owner had it for 6 years, but he only done 2000 miles a year, it has full service history with it , booked stamped mixture of porsche & specialist, there are loads of receipts that i have scrolled through. It has 123k miles on & runs sweet. I can find receipts for things like brake fluid change, oil filter & oil, air filter, tyres , exhaust, gearbox oil, transfer box oil, new rads, anti freeze change, pads, discs & loads of other bits!
My only concern is where owner did not click miles up, he only used to get oil & filters done evety mot (so once a year)+ anything needed doing consumables etc..
I read on this forum about 3 belts (or smething as been told these cars dont have timing belts??) have they got belts?? Where is best indy to use as i am on south coast (hampshire) My mechanic is good & done work on car but maybe thinking a good going over by someone that knows these cars would be good? Or am I just trying to cause probs & it has all been done as should??
I have a new porsche centre opened up in porstmouth but had to many bad dealings with main dealers (and they are a bit over priced!)I have always prefered the personel touch?
What do think guys????????
My only concern is where owner did not click miles up, he only used to get oil & filters done evety mot (so once a year)+ anything needed doing consumables etc..
I read on this forum about 3 belts (or smething as been told these cars dont have timing belts??) have they got belts?? Where is best indy to use as i am on south coast (hampshire) My mechanic is good & done work on car but maybe thinking a good going over by someone that knows these cars would be good? Or am I just trying to cause probs & it has all been done as should??
I have a new porsche centre opened up in porstmouth but had to many bad dealings with main dealers (and they are a bit over priced!)I have always prefered the personel touch?
What do think guys????????
iaiin said:
I have had my 1999 carrera 4 for about 6 months & enjoying it loads, bit confused over servicing, when i brought the car , the owner had it for 6 years, but he only done 2000 miles a year, it has full service history with it , booked stamped mixture of porsche & specialist, there are loads of receipts that i have scrolled through. It has 123k miles on & runs sweet. I can find receipts for things like brake fluid change, oil filter & oil, air filter, tyres , exhaust, gearbox oil, transfer box oil, new rads, anti freeze change, pads, discs & loads of other bits!
My only concern is where owner did not click miles up, he only used to get oil & filters done evety mot (so once a year)+ anything needed doing consumables etc..
I read on this forum about 3 belts (or smething as been told these cars dont have timing belts??) have they got belts?? Where is best indy to use as i am on south coast (hampshire) My mechanic is good & done work on car but maybe thinking a good going over by someone that knows these cars would be good? Or am I just trying to cause probs & it has all been done as should??
I have a new porsche centre opened up in porstmouth but had to many bad dealings with main dealers (and they are a bit over priced!)I have always prefered the personel touch?
What do think guys????????
Steve Bull Specialist Cars in Wiltshire are your best bet. He's very, very good and reasonably priced.My only concern is where owner did not click miles up, he only used to get oil & filters done evety mot (so once a year)+ anything needed doing consumables etc..
I read on this forum about 3 belts (or smething as been told these cars dont have timing belts??) have they got belts?? Where is best indy to use as i am on south coast (hampshire) My mechanic is good & done work on car but maybe thinking a good going over by someone that knows these cars would be good? Or am I just trying to cause probs & it has all been done as should??
I have a new porsche centre opened up in porstmouth but had to many bad dealings with main dealers (and they are a bit over priced!)I have always prefered the personel touch?
What do think guys????????
He won't do stuff that doesn't need doing and his knowledge is exceptional.
At the risk of being patronising (and I really don't mean to be)get yourself one of the many Porsche 911 books and build your knowledge of the car a bit, always handy when the technician is discussing your car with you if you've a good idea what he's talking about.
Oh, and I'm sure the spark plugs are in the right way up, some times when you ask a sensible question you don't always get the sensible answer you're after I guess?
Chrisp5782 said:
Steve Bull Specialist Cars in Wiltshire are your best bet. He's very, very good and reasonably priced.
He won't do stuff that doesn't need doing and his knowledge is exceptional.
At the risk of being patronising (and I really don't mean to be)get yourself one of the many Porsche 911 books and build your knowledge of the car a bit, always handy when the technician is discussing your car with you if you've a good idea what he's talking about.
Oh, and I'm sure the spark plugs are in the right way up, some times when you ask a sensible question you don't always get the sensible answer you're after I guess?
I am not to bad on basic car mechanics but i read on here about someone who chain/ belt broke in engine & cost a fortune to sort, so i though prevention is best.He won't do stuff that doesn't need doing and his knowledge is exceptional.
At the risk of being patronising (and I really don't mean to be)get yourself one of the many Porsche 911 books and build your knowledge of the car a bit, always handy when the technician is discussing your car with you if you've a good idea what he's talking about.
Oh, and I'm sure the spark plugs are in the right way up, some times when you ask a sensible question you don't always get the sensible answer you're after I guess?
I will get book but only basic stuff for me, cheers
gt3nor said:
They don't have belts, they have chains.
Have your car worked on by someone who knows them.
Well if they have chains do they break? I do have people work on them that know mechanics, but the odd thing is different,some dicks pay porsche to change a tyre when kwik fit can do it.Have your car worked on by someone who knows them.
Strictly speaking chains don't stretch.... the sprockets wear slightly which interferes with the mesh of the teeth and the chain, which, combined with wear to the roller and pin of the chain, gives the illusion of stretch. The elongation of the chain derives from the wear in the pins..........
The belt you are referring to is the polyrib belt, also called the serpentine belt on account of how many turns it make (like a snake).
It is a routine part to be changed every 4 years and drives ancillary engine powered equipment. As has already been said it isn't a timing belt as the engines are chain driven. That said if it fails you won't be able to drive the car and there is a danger the flailing belt damages something.
The areas to check are the edges of the belt but in particular the underside (ribbed) part of the belt. Look where it bends back on its self and check for cracking on the ridges.
When you take an old belt off and bend it backwards you will see the cracks opening up.
Hope that explains things.
Henry
It is a routine part to be changed every 4 years and drives ancillary engine powered equipment. As has already been said it isn't a timing belt as the engines are chain driven. That said if it fails you won't be able to drive the car and there is a danger the flailing belt damages something.
The areas to check are the edges of the belt but in particular the underside (ribbed) part of the belt. Look where it bends back on its self and check for cracking on the ridges.
When you take an old belt off and bend it backwards you will see the cracks opening up.
Hope that explains things.
Henry
Bennachie said:
Strictly speaking chains don't stretch.... the sprockets wear slightly which interferes with the mesh of the teeth and the chain, which, combined with wear to the roller and pin of the chain, gives the illusion of stretch. The elongation of the chain derives from the wear in the pins..........
A nice bit of pedantry!mollytherocker said:
Bennachie said:
Strictly speaking chains don't stretch.... the sprockets wear slightly which interferes with the mesh of the teeth and the chain, which, combined with wear to the roller and pin of the chain, gives the illusion of stretch. The elongation of the chain derives from the wear in the pins..........
A nice bit of pedantry!Glad I had a gander - Marcus is right - the mechanism of how something elongates does not stop it being stretched.
The problem is as the sprocket teeth wear the distance between them gets less (because the radius is then smaller) but the distance between the rollers increases. Chains work best because they share the load between several parts of the chain and several teeth around the sprocket, but as the teeth wear and the chain stretches more and more tension is confined to loading one tooth and in turn one link.
They say a chain is only as strong as its weakest link and as a chain stretches and the sprockets wear it can eventually find a weak link and snap it.
This is very rare but whenever rebuilding an engine the small cost of new chains is better than the risk of one letting go IMHO.
Baz
The problem is as the sprocket teeth wear the distance between them gets less (because the radius is then smaller) but the distance between the rollers increases. Chains work best because they share the load between several parts of the chain and several teeth around the sprocket, but as the teeth wear and the chain stretches more and more tension is confined to loading one tooth and in turn one link.
They say a chain is only as strong as its weakest link and as a chain stretches and the sprockets wear it can eventually find a weak link and snap it.
This is very rare but whenever rebuilding an engine the small cost of new chains is better than the risk of one letting go IMHO.
Baz
Henry-F said:
The belt you are referring to is the polyrib belt, also called the serpentine belt on account of how many turns it make (like a snake).
It is a routine part to be changed every 4 years and drives ancillary engine powered equipment. As has already been said it isn't a timing belt as the engines are chain driven. That said if it fails you won't be able to drive the car and there is a danger the flailing belt damages something.
The areas to check are the edges of the belt but in particular the underside (ribbed) part of the belt. Look where it bends back on its self and check for cracking on the ridges.
When you take an old belt off and bend it backwards you will see the cracks opening up.
Hope that explains things.
Henry
ok thanks, i am getting it now, so there is a belt that does waterpump & other bits which is just a matter of wear & tear (is this done under my standard service items, do you have to ask for garage to do this, or do you just wait for it to break?) The main engine chain is in for life & it either breaks or carries on working.It is a routine part to be changed every 4 years and drives ancillary engine powered equipment. As has already been said it isn't a timing belt as the engines are chain driven. That said if it fails you won't be able to drive the car and there is a danger the flailing belt damages something.
The areas to check are the edges of the belt but in particular the underside (ribbed) part of the belt. Look where it bends back on its self and check for cracking on the ridges.
When you take an old belt off and bend it backwards you will see the cracks opening up.
Hope that explains things.
Henry
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