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Nomad
10-01-2010, 11:29 PM
Hiya

For those in the know how - are oil filters cleaned and reused :confused:


Did my first oil change :thumbs: Would like to change the transmission oil eventually, let the mechanic do the belts and the fuel filter.

It's an Audi. The car does not have a dipstick for the transmission, so how is one suppose to fill it? Unless its underneath one of the covers. Interesting, it also does not have a radiator cap.

angry
11-01-2010, 12:19 AM
If this is an expensive audi, i beg to suggest you take it to some one who can explain it all to you BEFORE you create some VERY VERY EXPENSIVE issues for your self.

Oil filter are a disposable, consumeable.

They can be partially recycled and should not be landfilled, (because they still contain oil).

There WILL be a Coolant pressure cap (probably on a remote or Header tank) and a coolant overflow container, as you have not readily reconised them, get some who knows to identify them for u.

audi = very f expensive to fix.:horrified

Trev
11-01-2010, 08:39 AM
Transmissions don't usually have a dipstick but a oil level hole which is usually located by removing a bolt which then becomes the oil level hole, or sometimes the oil filler hole becomes the oil level hole, when the oil starts running out it is full. Check your owners manual.
:)

Nomad
11-01-2010, 11:36 AM
Its a 2001 model. No manual, from auction. Don't like dealers.

It appears to be filled underneath the car (trans). No radiator caps so appears the reservoir tank ...

We just heard from a mechanic that oil filters are cleaned and reused and want to double check....

Terry Porritt
11-01-2010, 12:39 PM
.......................

We just heard from a mechanic that oil filters are cleaned and reused and want to double check....

Absolutely no way..either you misheard..or the "mechanic" so-called is a bit round the bend.

As already said car engine oil filters are disposable items to be thrown away after use.

The filter media becomes loaded and embedded with particles and cannot be cleaned to as new.

Some filters are designed to be cleaned by reverse flow which will give a bit more life, some industrial "edge" filter units have a handle on top that can be turned to release dirt and the unit is then cleaned by reverse flow.

Then there are centrifugal filters which do not have a filter media that can be cleaned out.

sam m
11-01-2010, 12:52 PM
I think the mechanic would be referring to the transmission filter as some have a pan filter which can be cleaned.

If you want to change your transmission oil then get the mechanic to do it. Although not hard it is a job that is done rarely so chances are you may not have that car for next time around. Get it wrong can be costly, even checking oil levels on transmissions is not as straight forward as it seems.

MAC_H8ER
11-01-2010, 01:14 PM
you can wash out and reuse a oil filter IF you really really want to and its in desperate circumstances - ie you just hit your millionth hour of service on your farm bike and you MUST change the oil and filter but its 5am and the truck to get the sheep is showing at 6am and you only have oil and no filter for at least a day till you cang et into town and buy one THEN you might be able to get away with cleaning the filter out with whatever solvent flats your boat to get the bike running so you can finish off the last

but thats no.8 wire fix for a no.8 wire problem - you should keep that sorta stuff stockpiled anyway ;)

for an audi or any car you dont mess with that sort of thing - a filter is $8 to $20 its not worth the savings if it disentegrates and ruins the engine

hell if you get a good relationship going with your local garage or a place like oil changers they will do you a free filter as part of a deal or something - so there is no real excuse to skimp on it :thumbs:

i can see a good\violent argument starting about what brands are better and whats rebrnded rebrand retreaded air filters with blah :o

Nomad
11-01-2010, 01:21 PM
Its def the oil filter. Had the car oil changed and someone asked him about the filter that was being cleaned, the mechanic said you can clean and reuse it ....

The filter is maybe $50-70 for an OEM....

The gear oil - yeah needs to be level so cannot use the jack stands. Get it done outside. But I have read that Audi does not say anything about it, some say you should do a gear change each 4yr or 40,000km's.

But having said that, the Japanese cars we have, never have we been asked by the mechanic to change the gear oil. Don't they we have ever changed that for all the cars we had before .......

Terry Porritt
11-01-2010, 01:44 PM
The only types of oil filter that can be cleaned, as mentioned, are the mechanical types like edge filters, strainers, and centrifugal filters. Centrifugal filters used to be fitted to trucks, one manufacturer was Glacier Metal. They are actually quite efficient.

The average car mechanic and his workshop would just not be clean enough for cleaning filters by reverse flow. He would need a special hydraulic pump/tank unit filtered to a higher standard than the filter he is trying to clean.



I can see a good\violent argument starting about what brands are better and whats rebrnded rebrand retreaded air filters with blah

Without a flow rig and particle counter/measurer it is not possible for the man in the street to have any idea how good or otherwise any particular brand is.
You would have to audit the manufacturer, see where they get the media from and how clean their manufacturing and assembly plant is.

When GMs were in Petone I saw their filter manufacturing set up, there were no special precautions taken with cleanliness.

Even big name manufacturers like Fairy Filtration can come badly unstuck. Back in the 70s, to keep up with competition like Pall Filters they introduced 1 micron absolute hydraulic filters.
These were a joke and cost us a lot of money. They used their standard cast iron bodies which shed particles of up to 30 micron for up to about 30 hours at full rated flow.

As a result of our work they then vacuum impregnated the cast iron bodies with epoxy..... but as far as we were concerned it was bye bye Fairy........

Nomad
11-01-2010, 01:59 PM
Question re: liquids.

Some say this oil and stuff ... that adhres to this standard or this accreditation ....... You go into car shops and they have castrol, mobil, etc etc... does one need to be this careful and make sure the standards and accred. are supported ?

And also, take a normal car, like a Toyota we have, say going to a Toyota dealer for maintenance vs a mechanic.

Terry Porritt
11-01-2010, 02:20 PM
Just ensure the oil you are buying conforms to or exceeds the car manufacturers specifications. There will not be that much difference between the big name oil 'manufacturers' in this country. With an oil based lubricant (don't know about synthetics), they probably all use the same base stocks and then put in their own additives

Mechanics attached to car dealers like say Toyota may well be audited, as may be approved shops that specialise in certain makes, and their personel may well go on training courses for those makes.

I go to the local mechanics I've been going to on and off for over 30 years :) They do a good job. When I had a new Daihatsu, then I went to a local Daihatsu appointed mechanics.

hueybot3000
11-01-2010, 04:27 PM
It scares me how little some drivers know about their cars

prefect
11-01-2010, 04:31 PM
Just ensure the oil you are buying conforms to or exceeds the car manufacturers specifications. There will not be that much difference between the big name oil 'manufacturers' in this country. With an oil based lubricant (don't know about synthetics), they probably all use the same base stocks and then put in their own additives

Mechanics attached to car dealers like say Toyota may well be audited, as may be approved shops that specialise in certain makes, and their personel may well go on training courses for those makes.

I go to the local mechanics I've been going to on and off for over 30 years :) They do a good job. When I had a new Daihatsu, then I went to a local Daihatsu appointed mechanics.

Types of oil ba it all comes out of the ground terry. You can run coconut or castor oil as a lubricating oil in an engine if you want.

--Wolf--
11-01-2010, 04:47 PM
Don't go back to the mechanic that told you to clean and reuse your oil filter.

And don't pay $50 - $70 for a OEM filter, unless you have money to waste. I got a repco one for my car for $13. Sure, it's not an Audi, but they all do the same thing really - and I just spent 4k on my engine and yes I do trust a Repco filter.

As for what oil to use, I'd search your car on the net and find what people recommend for YOUR car. Had a guy at oil changes tell me 5w-30 was too thin for my car, and then he compared it to his SUBARU.

If in doubt for what brand of oil, go Castrol if you can afford it. The Edge/Sport is the same as the German Castrol sold overseas.

Most people don't really understand how oil really works. In really basic terms you want an oil that is quite thin when it's cold, as that's when most damage occurs (when your car is cold). Generally, it's all pretty much the same viscosity at operating temperature.

Terry Porritt
11-01-2010, 04:58 PM
Types of oil ba it all comes out of the ground terry. You can run coconut or castor oil as a lubricating oil in an engine if you want.

You may well think that...but I couldn't possibly comment :) Well yes, suppose I can.

Castor oil is actually a very good lubricant, has fatty acid long chain molecules that attach to a surface. As you know used to be used in racing engines as well as 'ordinary' engines at one time, Castrol R and all that.... but high temperature properties are scungy. Have to change the oil after every race or every few hundred miles.
Good for adding a drop to the petrol to get that....Ah, Castrol R smell.

In the olden days before 'universal brake fluid', Girling brake fluid was castor oil based then there was somewhat of a controversy with Lockheed as to what standard and materials to adopt...Lockheed won, hence the brake fluid we have today.

tweak'e
11-01-2010, 06:00 PM
do not wash out filters. unfortunately plenty of idiot mechanics do, even supposed good ones.

oil.... check what the vehicle requires and any oil that you CAN NOT use.
eg i have a vehicle here that cannot use a certain grade oil, below that grade is fine and above that grade is also ok. its just that certain grade they leave something out which stuffs up these motors. the warning is in the handbook.

i would also look after the vehicle extremely well, cheap euro cars are VERY expensive to fix.

R2x1
11-01-2010, 07:59 PM
A far better idea than washing the oil filter is to cut it open and see what it has been catching. A messy process that just may someday show you that something nasty is going on that you should check before it turns to disaster. If the residue is metallic, it is not a good sign.

With Audis, some owners former suggest you save the oil and change the engine. I couldn't possibly comment.

angry
13-01-2010, 04:57 AM
Types of oil ba it all comes out of the ground terry. You can run coconut or castor oil as a lubricating oil in an engine if you want.

Mix mineral and high quality synthetic, on a regular basis, in your favorite car, please, Pretty please.

:rolleyes:

prefect
13-01-2010, 07:30 AM
I dont even own a car.

Cato
13-01-2010, 07:51 AM
Plenty of people reuse oil filters. I'll find you a link.

I'd go 20k-ish before I change the filter. 7-10k for oil change. No issues.

Washing it does sound like a bad idea though, as water will contain bigger particles than oil. And it probably wouldn't be designed for reverse flow.

Prefect, I am sure driving a bus to the dairy will hurt the environment, think of the children!!! :p

prefect
13-01-2010, 08:38 AM
Mate I never go the diary I dont smoke, Prices are too steep compared to supermarket.
My wife has a Ford Ka I have a breakdown truck a Ford Trader.
I dont thinks its possible to clean out a paper oil filter because sediment (silt and carbon) is embedded in the paper.
Aircraft have cleanable filters which are finer than paper but they are put in an ultra sonic cleaner which shakes the stuff out.
My trader has a bypass oil filter which filters the oil if the main filter is blocked and filters oil from relief valve. My Hino buses have a oil filter pressure bypass light which come on if the filter is blocked never had one come on.

angry
14-01-2010, 01:33 AM
My Hino buses have a oil filter pressure bypass light which come on if the filter is blocked never had one come on.

Those bypass indicators are know to seize on a regular basis.

+
Hino go.
Hino good.

And when he enter's your workshop:

Hino want to leave.

+
There's a lot more, but I can remember them at the moment.

But I do know, Hino like it at all, if you mix the wrong pair of mineralls and synthetics.
:)

Phil B
14-01-2010, 09:09 PM
I think next time I buy a car I'm going to ask if they are a press f1 member. If the answer is yes, I'll run a mile

R2x1
14-01-2010, 09:14 PM
Best idea yet ;)