mannysmechanicalrepairs.com.au November 12, 2019 No Comments

What is a Catalytic Converter?

The last two blogs have been about air flow at high engine speed through variable valve timing(  keeping the intake valve on longer @ higher speeds) The other blog was on precise relation & correlation between the valves and crankshaft through a timing belt.

Today I will talk about Catalytic Converters.

In the last 6 moths a number of customers have come into the workshop & Mannys Mechanical with the engine light on. Once scanned the dreaded fault code P0420 Catalyst system below threshold has been recorded. What does this mean? and why is it so expensive to fix?

What is a Catalytic Converter?

In 1986, Australia outlawed anti- knock agent Tetraethyl – Lead made it compulsory for cars to use Unleaded petrol. Also cars were fitted with catalytic converters in the exhaust system. A catalytic converter converts harmful unburnt fuel (hydrocarbons) into a inert gas.

A catalytic converter uses precious metals to react with the incoming exhaust gases in a ceramic monolith with a honeycomb structure.

The catalyst itself is most often a mix of precious metalPlatinum is the most active catalyst and is widely used, but is not suitable for all applications because of unwanted additional reactions and high cost. Palladium and rhodium are two other precious metals used. Rhodium is used as a reduction catalyst, palladium is used as an oxidation catalyst, and platinum is used both for reduction and oxidation. Ceriumironmanganese, and nickel – this list pretty well explains the expensive metals used & hence the cost.

There are a few different catalytic converters – a two way & three way. For catalytic converters to be effective the temperature must be around 426celcius. Which is why they are usually incorporated in the exhaust manifold & this is also the reason why oxygen sensors also have heating elements.

The picture above shows Kamahl holding a brand new Catalytic Converter incorporated with engine pipes to suit a Subaru Outback $2698.00 – yet they sell on Ebay for $400.

Would I buy from Ebay?

Not in your life. You will be lucky to get 4 months before it fails again. Heaps of after- market cheap rubbish do not use the precious metals listed above to last.

What do they mean P0420 Catalyst below threshold?

Generally there are two Oxygen sensors – a pre-catalytic converter & a after catalytic converter. They do a few jobs (Look at KAMAHL holding the cat` you will see one small hole and a extension where the oxygen sensors fit)

  1. They monitor how much oxygen is in the exhaust emissions and they measure is the catalytic converter reaction buy monitoring the change of state (threshold). If  the post cat sensor mirrors the pre-cat sensor, then the catalytic converter is not doing its job the fault code P0420 is registered. This information is monitored & compared through the computer in a term called closed loop.

What Causes the Failure?

There are number of reasons that can cause failure of a Catalytic converters. Vibration is probably the biggest killer. Exhaust systems have engine pulses which travel thousands a time a second these pressure waves can eventually break away the inner supporting structure-excessive over-fuelling through poorly tuned engines, coolant is one of the biggest killers- when a vehicle excessively over heats causing coolant to get in the exhaust system. Age, I am seeing vehicles around the 10 year mark coming in with this problem/fault code.

It’s so expensive to fix should I worry about it?

Well Yeah! When engine and emission lights come on, your vehicle is immediately un-roadworthy & if these hooligan climate activists have their way about climate change (running around half naked chaining themselves to toilet blocks & moving TRUCK WHEELS) will eventually  force Governments to crack down on vehicle emissions.

This could mean you, the car owner & me the automotive repairer will face some serious fines if the repairs are not carried out immediately.

What this does do?

It puts serious stress on. Say single mothers  to get their cars fixed straight away, whether they can afford it or not-..I would love to check  the car emission status on all these screaming activists & see how well kept their cars are- people in green house glass houses should not throw stones!

I hoped this has helped- Manny

Knowledge is power- Power is organized effort!

Call Manny on 0411 496 621 today.

To Serve To Perform To Guide- Bringing Automotive power to the people

At Manny’s Mechanical Repairs you are in good hands, our main services include, Safety CertificatesLogbook ServiceFree Pickup & Delivery, and Car Cooling System Repairs.

We have the latest diagnostic equipment and my work van is fitted out with an industrial air compressor. This enables me to perform heavy duty work and give you – the customer – the best service at any place and at any time.

For Bookings and enquiries, please contact us on 0411 496 621email us at agrade@mannysmechanicalrepairs.com.au or visit our site www.mannysmechanicalrepairs.com.au.

mannysmechanicalrepairs.com.au June 4, 2019 No Comments

Accurate Car Diagnostics Brisbane

Accurate Car Diagnostics Brisbane is the most vital skill to a successful car repairer, service man or tuner. 

As a business owner I am continually reviewing on how we can make the business better in the service-calibrate-repair business.

The number of times I receive phone calls of potential customers wanting to immediately know the price to fix a complex automotive problem is a very frustrating & a on-going scenario – especially when we do not know or have examined the problem or have no service history of the vehicle.

We also have to deal with immediate gratification society

A wrong comment, information, diagnostic or quote can lead to possible serious litigation consequences.

Accurate Car Diagnostics

Ok. You have a problem with a car..,

So let us start with some serious psychological analogy that must be changed straight away

  1. Cars are now computers on wheels, make no mistake- they require serious protocol.
  2. Fixing a problem requires time, So make time to get the car checked out & get other transportation to get by- & please- please- please make sure the car has at least ½ tank of fuel .
  3. Be very wary on who is diagnosing your problem & have they got the right diagnostic equipment- the old adage “Garbage in- Garbage out.” It amazes me how I have to deal with a customer who has had a wrong diagnosis from a tyre shop or a muffler shop.
  4. Totally not interested in customers who only focus on price or supply their own parts.
  5. Focus on the problem one at a time-
  6. This is the Biggy!-  If you think Mechanics/Technicians are bogans or are inferior forms of human evolution- WHO SHOULD ONLY CHARGE PEANUTS.., because we do not have a university degree & that what we do is your perception of mediocrity- you will get my steel cap boot up your Google one star…….. rating!

Why Choose Manny Mechanical Repairs for Car Diagnostics

Fixing a problem is a process that must be backed up by accurate data.

Here is what we do:

  • Complaint – Accurate information supplied by the customer is so vital, when, where, how? @ what temperature cold or hot, what speed ? turning left or right- Get the picture..,
  • Procedure – Test driving the vehicle requires verification of the problem. From here.., It cannot be stressed that the correct symptom is itemized, this may require test driving with the customer to again verify the problem.
  • Course of action – Once the symptom/problem has been isolated & confirmed- measure, checks & the system has to studied with correct diagnosing equipment – in the case of engine performance issues this is further broken down to Air- Fuel- Mechanical- Ignition areas- until the cause is found- once the cause is located two vital pieces of information are now known- cost & time how long it will take to fix.
  • Under no circumstances do we guess!
  • The last part is a summary of the whole procedure & any other items that may require attention-this then followed by a quote

Accurate Car Diagnostics Brisbane

Accurate diagnostics is a organized procedure that cannot be underestimated – I stress to you reading this blog- do your homework!

Now with hybrids-electric vehicles we are living in the most exciting times- does that scare me..,? Not at all- because the organized process can be adapted to anything once you know how.

 These parts changers who I have as opposition-using gimmicks & cheap price servicing will fall on their swords because you get what you pay for.

Knowledge is power- Power is organized effort!.

Call Manny on 0411 496 621 today.

To Serve To Perform To Guide- Bringing Automotive power to the people

At Manny’s Mechanical Repairs you are in good hands, our main services include, Safety CertificatesLogbook ServiceFree Pickup & Delivery, and Car Cooling System Repairs.

We have the latest diagnostic equipment and my work van is fitted out with an industrial air compressor. This enables me to perform heavy duty work and give you – the customer – the best service at any place and at any time.

For Bookings and enquiries, please contact us on 0411 496 621email us at agrade@mannysmechanicalrepairs.com.au or visit our site www.mannysmechanicalrepairs.com.au.