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Old 16-09-2019   #76
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Quote Originally Posted by deeinlondon View Post
Still struggling to get that 6mm Hex Bolt Off with an Allen Key and an bar over it to make it longer. Little bit worried about damaging the head and this is one of 4 bolts to remove, the other 3 are recessed and much harder to access.

Although this one is the most rusted as it has the least cover and most in contact with water from the road.

I have order a new set of Allen Keys which is supposed to have better grip for turning, will try again when that arrives.
You can buy an allen key built into a socket that will give you the grip and quality you need to remove a rusty allen bolt. A single socket is not expensive.
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Old 16-09-2019   #77
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Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

As I mentioned earlier a small socket bit with your Allen key inserted into it and extension arm should make short work of those and reach the recessed ones
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Old 17-09-2019   #78
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Hopefully I've got someone coming on Saturday to give me a hand getting the oil sump off

I was looking into perhaps also buying a new oil sump at the same time and noticed the ones on eBay that say fit my car have 14 bore holes whilst other websites list it as having 17 bore holes.

I guess I'll have to get under the car tomorrow and start counting the number of holes.
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Old 17-09-2019   #79
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Quote Originally Posted by deeinlondon View Post
Hopefully I've got someone coming on Saturday to give me a hand getting the oil sump off

I was looking into perhaps also buying a new oil sump at the same time and noticed the ones on eBay that say fit my car have 14 bore holes whilst other websites list it as having 17 bore holes.

I guess I'll have to get under the car tomorrow and start counting the number of holes.
I had a look at the hex bolts on my car.


I took off the front one at the end with a 3/8ths socket extension and a 6mm bit. It was fairly tight for such a small bit and came undone with a crack. The bolt was still lacquered like new. It screws into an aluminium casting, so the steel bolt is protected from rusting by the aluminium - even so I think you are going to struggle without having a socket set with a 6mm bit. The bolt is 5cm long with 4cm threaded.. I suppose it would be torqued to 15- 20nm
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Last edited by judderbar; 17-09-2019 at 13:39.
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Old 17-09-2019   #80
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Well I counted the number of bore holes on my current oil sump - appears to be 17 bore holes - so got to be careful as some websites including eBay list the sumps with only 14 holes as fitting my car.

The other thing I noticed is I'm sure there appears to be a fitted gasket on my oil sump - yet I've searched online and cannot seem to find a fitted gasket on sale on any website - Does this mean if I remove the sump I'll have to remove the gasket and then use some kind of gasket making paste?

I see on ebay the sump with 14 bore holes can be bought with the sealant included for less than £20 but no one that sells the 17 bore hole version seems to sell gasket making paste with it, so don't know if you can do it that way or if there are ready made gaskets for sale but they're just hard to find.

Having said that on the inspection camera it did appear as if the gasket from the inside was paste- I guess I'll only really find out once I manage to get it off.
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Last edited by deeinlondon; 17-09-2019 at 15:57.
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Old 17-09-2019   #81
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Hi I used Granville black silicone sealant and it was perfectly fine with good prep and allowing an overnight going off period , you can certainly spend more on gasket makers etc but thatís what I used ,I lightly tightened bolts evenly all round and then had a cup of tea etc and went back and sent them
Home hand tight , not overly tight or youíre compromising the thickness of sealant . 200 odd miles later now and totally dry
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Old 21-09-2019   #82
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Well the person that said they were going to come around today and give me a hand getting the sump off cancelled on me.

On the plus side I decided to order a Brushless Impact Driver last night from Amazon and it arrived today and helped me get off the 6mm hex bolt I posted about

Of course there are three more 6mm hex / allen key bolts to go which I need to buy an extension for to reach. Also managed to get off all the front sump pan bolts using the same impact driver.

So some progress today.

I happened to mention my car problem in another non-car related group I belong to and loads of people suggested a simple engine flush at idle first to see if the oil pressure light flickers to suggest some kind of cleaning action.

I showed them the photos from the oil inspection camera but none of them think it's a crack, they just think it's carbon along the seems of the oil pickup pipe.
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Old 22-09-2019   #83
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Well I've ordered some extensions for my impact driver - hopefully they'll be both long enough and strong enough to reach the other 6mm Hex / Allen bolts.

In the mean time thought I'd share a clip from the video I filmed when this all first began - I'm surprised at how many people who have seen the stills don't think there is a crack in the top of the oil pickup tube - wonder if the video changes some minds - especially around 10 to 20 seconds

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Old 22-09-2019   #84
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Quote Originally Posted by deeinlondon View Post
Well I've ordered some extensions for my impact driver - hopefully they'll be both long enough and strong enough to reach the other 6mm Hex / Allen bolts.

In the mean time thought I'd share a clip from the video I filmed when this all first began - I'm surprised at how many people who have seen the stills don't think there is a crack in the top of the oil pickup tube - wonder if the video changes some minds - especially around 10 to 20 seconds

https://youtu.be/1y4hI770SVY
There does not seem to be an obvious failure reason because each end of the black area is still intact. So how can it be a crack?
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Old 22-09-2019   #85
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Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

I still think you are correct to remove the sump , you seem to care for the car and from what Iíve seen your sump will probably start to leak soon anyway , thereís no harm in unbolting the pick up and inspecting it and checking for blockages , impossible to tell until itís off , you just got a bit unlucky with your set up Being a little difficult to remove underneath , but itís worth it even if itís just to get the sump changed out and peace of mind all is good down there plus youíre better equipped to tackle more jobs in the future now
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Last edited by Fialfa; 22-09-2019 at 23:33.
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Old 23-09-2019   #86
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Quote Originally Posted by Fialfa View Post
I still think you are correct to remove the sump , you seem to care for the car and from what Iíve seen your sump will probably start to leak soon anyway , thereís no harm in unbolting the pick up and inspecting it and checking for blockages , impossible to tell until itís off , you just got a bit unlucky with your set up Being a little difficult to remove underneath , but itís worth it even if itís just to get the sump changed out and peace of mind all is good down there plus youíre better equipped to tackle more jobs in the future now

I think you are correct in terms of peace of mind - however it's kinda proving a nightmare to get the sump off at home and I suspect would be even more of a nightmare to put back on the car.

However I just thought of another way to test for oil pressure - I noticed on the new Oil Pressure Switch that I installed that is said 5 to 7 PSI on it - so it needs at least that much pressure to disconnect the circuit.

So then I thought why not install a meter across the switch and use that to see if the switch disconnects once the car is started - I managed to find an old lead that fitted nicely into the pin of the switch - video below shows that as soon as the car is started there was enough pressure to activate the switch and break the circuit (which would normally turn off the low oil pressure light inside the car).

I don't know how the engine sounds to anyone else, it sounds fairly normal to me* - usually my car gets a lot quieter as soon as it's on the move. Also the car battery had been unplugged for at least a week so I assume the car's computer / ECU has lost all it's settings and is in a learning mode on this first start.

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Old 23-09-2019   #87
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

BTW when I added back the oil to the car, I put in 2.4 litres and it showed at full on the dip stick, after letting the car run for approx 2 minutes and then rest for an hour I rechecked the dipstick and it went from full to half way on the dipstick.

I believe the car uses 2.8 litre in total - The oil filter is brand new but had been run on a previous test after putting in the new oil so I assumed it was holding a certain amount of oil as well.
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Old 23-09-2019   #88
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

I just managed to get the low oil light to turn off by plugging it back in the switch - it seems it's as if this system isn't as simple a ON and OFF even though that's how the switch works.

There was a small resistance in the wire that goes to the switch - so that resistance seems to tell the car the difference between being ON / OFF and Disconnected

Only thing I can think of why the light has gone off now and not the time I tested it after changing the oil pressure switch is that I disconnected the battery for over a week - so the car's computer has probably reset itself and lost old values.

I was thinking to myself it seems really unsafe to have a low oil pressure warning light that goes off when the wire is disconnected because if you got a cut in the wire by accident you'd never know, but by using a system of resistance it would be able to tell the differences between 3 states at least.
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Last edited by deeinlondon; 23-09-2019 at 17:27.
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Old 24-09-2019   #89
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

I got hold of a gauge from Amazon today but I think it's defective as the needle never moved, I'm not even sure if the oil is able to get through the tube and this same gauge has two 1 star reviews since the time it was ordered that said the same thing - it didn't work at all.

Interesting thing to note is that when I unplugged the wire to the Oil Pressure switch - this time it went off before I even started the engine.

So I think there is a mix of the light being something that gets stuck in the car's computer as always being on when there's no more fault and needs a computer reset, in my case probably causes by disconnecting the battery for a long time.
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Old 24-09-2019   #90
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Re: Year 2000 Mk2 Punto Sporting Low Oil Pressure Light

Quote Originally Posted by deeinlondon View Post
I got hold of a gauge from Amazon today but I think it's defective as the needle never moved, I'm not even sure if the oil is able to get through the tube and this same gauge has two 1 star reviews since the time it was ordered that said the same thing - it didn't work at all.

Interesting thing to note is that when I unplugged the wire to the Oil Pressure switch - this time it went off before I even started the engine.

So I think there is a mix of the light being something that gets stuck in the car's computer as always being on when there's no more fault and needs a computer reset, in my case probably causes by disconnecting the battery for a long time.
With a computerised car it does not seem correct that the oil light goes out when you dont have a sensor plugged in.
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Last edited by judderbar; 24-09-2019 at 15:53.
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