mrsmackpaul

When a motor is rebuilt, generally I would remove as much from the cooling system as I can Leave the radiator cap off until operating temp is achieved and the thermostat opens Any air trapped in the motor is released, top the cooling system off, put the radiator cap on, take for a test drive and check everything is okay I reckon thats pretty standard across the world and open to correction if I'm wrong and missed a step Joey your right about cavitation, but what is it, we know the result of it But what causes it ? I had it explained to me many years ago in a way that made sense Were does this air come from ? Paul

This doesn't really explain were the air comes from once the air is expelled What is this tricky thing called cavitation ? What causes it ? And how can that is alledgedely trapped in a water pump be such a issue ? How doe's a centrifical pump work ? These are all things that have to be understood to understand how cavitation occurs and what is required to stop it Ask a irrigation farmer that relies on centrifical pumps about cavitation and it's effects on pump life and the pipe work connected to the pump I can tell you as a irrigation farmer, that water will not get stuck in the pump as your suggesting The moment a centrifical pump is primed and spinning that water is gone If it wasn't the the pump wouldn't be primed So keeping this in mind, assuming that bit of information I have suggested is correct Were does this pesky air come from that causes cavitation? I can assure you it isn't the injector sleeves And why do some makes of motors never suffer from this and others do all the time ? I'm trying not to be condescending here, we all learn things differently and I'm trying best to teach people here Cavitation isn't simple like people think Paul

John Deere sold plenty of industrial engines, lot of farm irrigation pumps and generators had/have John Deere engines Dunno about Mack, I'm thinking Kato cranes in Australia But I'm fairly sure they were a crane bolted to a Mack chassis Paul

WOW thats a lot of typing Anyway, lets keep it simple because Im a dumb ass If the air is expelled from the system, why does it have a pipe, going up fown, left, right or were ever to bleed trapped air away ? As once the air is expelled, there is no air left So whats the purpose of this pipe work ? Paul

Well I guess engine blocks and heads must be different in the southern hemisphere than in the Northern hemisphere as there are plenty of spots in castings were air can be trapped So keeping this polite and well mannered If air is simply trapped in the water pump as suggested, why do manufacturers put a little pipe or hose around the pump to the thermostat side ? Paul

Dunno if you blokes have scones in Yanky land or Devonshire tea's or any of that jazz anyway, when sausages are more flour than meat at a butchers, if we are been really cheeky we may ask for so many kg's of scones ha ha ha Paul

I could agree with Geoff, but we would be both wrong then The first thing people need to understand is what cavitation is It isn't just air in water Anyway I'm sure you'll have quotes and stories that will shoot me down in flames and I'm not getting into a I'm more right than you type of conversation We need to understand what cavitation is and what causes it and how a pump actually works and if air really got trapped that easily in coolant system then there would be bleeders all over the block and head and any little defect in the castings Anyway I'll leave you to think you're right as I'm only a dumb ass skippy the bush kangaroo from Australia ha ha ha Paul

Come to think of it, a Detroit water pump is down really low so plenty of atmospheric pressure to lift any air out Paul

Because Mack built motors properly Probably need a bleeder on a Cummins as Cummins were susceptible to cavitation Detroit (2 stroke) I have never heard of any cavitation issues IH was like Cummins and renowned for cavitation problems Paul

Floor boards ??? Hope the termites don't eat it 😯 Paul

A sausage sandwich has a very different meaning in Australia Let me just say, at the gay Madi gra you would be very popular eating sausage sandwich Paul

Again from the Rootes, wouldn't think many H model Macks on the Alcan hwy "North American Imp" Paul

Well I think hell has just frozen over, have had tofu twice now and it wasn't to bad, not as good as bacon or Spam but was okay and quite enjoyable I have become a very modern person Paul

It must be pretty big difference Even C models as I may call them, CH, CHR and so on used the R model chassis in Australia There has gotta be something special about the R model chassis I'm gunna say, without looking it up that Mack Australia stopped using the R model chassis maybe 10 - 15 years ago Paul

You are seeing this right This is a F model and they were only sold for a very short time before the F model cab was put on a R model chassis and from then on they became the FR The R model chassis was used well into the 2000's as it is suited to RHD trucks Paul

from Facelessbook BAILEIGH RADAR ALERT 🚨 Our hearts break as we bid farewell to “Rosie the Riveter” Lila Tomek, who has passed at 101, a quiet giant of the Greatest Generation, a woman whose courage echoed far beyond the factory walls she once stood within. At just 19, while others clung to comfort, Lila stepped into history. She left behind her office job in Pawnee City, Nebraska, as her two younger brothers marched toward war, one to the battlefields of Europe, the other into the vast uncertainty of the Pacific. She could not carry a rifle, but she carried something just as powerful: resolve. And so she chose her battlefield, the roaring production lines of the Glenn L. Martin Bomber Plant near Omaha.🕊️🇺🇸 Amid thunderous machinery and the constant hum of urgency, her steady hands helped build the B-26 Marauder and the B-29 Superfortress, aircraft that bore the weight of hope for a world desperate for peace. Each rivet she fastened was an act of defiance against tyranny. Each shift she worked was a prayer for her brothers’ safe return. As victory crept closer, Lila was entrusted with a mission cloaked in secrecy, preparing aircraft for a purpose history would later reveal. She asked no questions. She sought no praise. She simply served. Because true bravery does not always stand on the front lines. Sometimes, it stands at a workbench, sleeves rolled, heart steadfast. When the war finally fell silent, she returned home not as someone seeking recognition, but as someone ready to build again, this time a family, a marriage with her beloved Rudy Tomek, and a lifetime of service to her community. Her strength was never loud. Her humility never wavered. Her legacy never needed applause. Today, we do more than remember her, we honor her. A woman who helped forge victory with her bare hands. A sister who carried fear and faith in equal measure. A hero who proved that sacrifice wears many faces.

We are counting down the days until the Kyabram Mack Muster! Put it in your calanders folks 21st and 22nd of March 2026!! Mack Fact for all you fans…. The Golden Era of the R Series! 🚛 The strong acceptance of the R model, with its large cab, new-fangled fibreglass and tough steel bonnet options, and tried-and-true drivetrain components was reflected in the sales statistics – nearly 280 in the first 18 months of R series production. At the same time, Mack Australia was still building the last of the B models – around 60 in the same period. The clear engine and transmission choice was the 211hp naturally aspirated END711 with the 18-spd Quad box – nearly 70% of these B & R models had this combo. To change this operator preference, something REALLY special would have to happen. The Golden Era of Mack Engines arrived in early 1968 – something special was about to happen! It was the MAXIDYNE concept – the gold-painted turbocharged 237hp Mack ENDT675 engine, with its industry-leading torque of 900 lb-ft. Mack boldly matched the engine with a 5-speed transmission to take full advantage of the incredible high torque for maximum fuel economy, reduced gear shifts and improved trip time. This drivetrain was revolutionary, and the Mack ads of the day highlighted the reduced driver effort – a big change from 18 gears and 2 sticks to one stick with 5 or 6 gears at most. Of course, a special identity came with the Maxidyne concept – a gold bonnet mascot. Now staring at a dog’s bum all day had a whole new look! The Golden (Maxidyne) era lasted 15 years – until 1981, when the air-to-air intercooled Econodyne engine series was introduced. Of the 13 different engines offered over the period, Maxidyne engines were fitted to nearly two-thirds of the almost 3,500 R models built. An amazing outcome that we all love! Paul

My boy is flying down on the 13th March from north QLD to polish and tidy the old bucket of bolts up I have been charged with making a new exhaust and fixing air leaks and tidying up other bits and bobs Would like to re plumb the air system as the airlines are about stuffed Paul

THE COUNT DOWN IS ON: 26 DAYS Bit of a long one today - The R model Grows Up! With the increased demand for the R series, resulting from the release of the stump puller Maxidyne 237 engine, more Mack owners got a taste of what real performance was all about - suddenly those hills were dimples! This, in turn, created the demand for a truck with even more performance! So in late 1970, the R model got stretched - 12 inches or 300mm in length, to accommodate a longer bonnet and was known as the R700 series. It would house the emerging larger more powerful engines from Mack and other engine suppliers. Mack had been working on an update to its 14.2 litre V8 - using the now proven turbocharger technology to increase engine performance and efficiency. However, this was still under development in the USA so, in Australia, that extra space was, initially, mostly filled by the 237hp Maxidyne and a noisy V8 - the 318hp GM 8V71NA. For the first time, Mack had engines that delivered high torque or above 300 hp - an incredible output in 1971! Later that year, the Mack 14.2 litre ENDT865 Maxidyne V8 arrived - 325hp and nearly 1000lbft - and so now the R700 series offered serious performance. The shorter R600 series was also upgraded - getting a turbocharged and inter-cooled version (aka Cool-Power) of the Maxidyne 6 cylinder - 285hp and over 1000 lbft - a real hot rod! To keep up with demand for higher performing highway trucks, the R700 lead the way again, getting a Thermodyne version of the new Mack V8 - it delivered 375hp. Cummins 14litre engines were also fitted, with a 400hp rating being available. In 1976, the R series got a even bigger brother - a rugged Flintstone looking off road R800 version, with massive frames and hauling capacity. It shared the same R cab and engine options as the R600 and R700 - but serious hauling capacity set it apart. We will talk about the BIGGEST R series later. In 1978, the next evolution of the R700 was launched in Australia - a bold square bonnet with heaps of space to accommodate the biggest and highest performing engines of that era - the first 3 were fitted with the largest diesel truck engine then available - the huge 450hp 18 litre Cat 3408 V8. Mack was developing its own high performance V8 - the 16.4litre E9 rated initially at 400hp. To go with the bold look, this R700 Series was aptly named Super-Liner. Over the next 13 years, the R700 Super-Liner evolved into a second series and the engine performance continued to grow - to 500 hp. The R600 series also continued to grow, transforming in 1986 into the set back steer axle Value-Liner range, offering Mack 12 litre E7 6 cylinders engine up to 400 hp. There was also a R700 version of the Value-Liner, fitted with the 16.4litre MACK E9 V8. In its 24 years, the R600 series evolved from the rugged Flintstone to the nimble Value-Liner - and in 1990, the last new R series was introduced - known as the Metro-liner, it was a tough compact urban hauler. We will have a look at this uniquely Aussie Bulldog later. Paul

Ha ha, yeah like that is really gunna happen lol I think tofu is actually on the menu tonight, a first for me, not even sure what it looks like It finally rained here, still muggy and warm Paul

Yeah, as above I'm thinking a carton of Marlboro and the bottles of Yukon Jack might be the go Oh and a full size model to keep you warm Tofu ???

Yeah, it does apparently get cold in aome parts of the world Stay warm and dry, if all else fails, drink Bourbon Have discovered the brand of Basil Hayden Bourbon Not a bad drop and sure to help keep you warm And I hope you don't end up with 50 strand Hereford steers after the storm Paul

Brocky, you ask and Google offers the answer Paul

Well it's meant to rain here, well at the moment actually Any still is meant to be raining Pretty crappy amd muggy at the moment We have just clay soil here and if there's any more than a 1/4 of a inch of rain we can't move So loaded the Mack for another run Still a good old bucket of bolts Just got a message about another load today, Princess will not be happy ha ha ha don't get to lost in the snow there Paul

From a Commer promo film, a Commer knocker bags up this old Mack in Mexico climbing a hill Paul