A couple of years ago I finished breaking apart the interior of my '84 HiLux 4X4. The arm rests and door panels are ok but the sides and back of the cab of hard molded plastic was removed. I have almost as many miles on the second engine as the first 175K vs 265K.
Had problems with a plastic keeper on my '95 K2500 for the clutch. Turns out that it was failing cause the clutch was worn out. Next time it will be a tow truck clutch as I haul a camper around 100% of the time.
I'm partly rebuilding the K2500 350cid engine. Cylinders #6 & 8 have exhaust valve pitting in the seating area. #6 had no compression. #8 had 100 psi increasing to 145 with oil. The right bank still had swirl marks from honing. And #6 intake valve head was smaller than #8 guess the wrong part got into the assembly. Made by monkeys I guess. Lost my train of thought. The valve stem seals broke off and the valve stem seals were hard. Different kinds between intake and better sealing exhuast. Interesting change.
Well for sure the parts that came with it when I bought it new were from Toyota, and all the replacement parts have been from the Toyota dealers. Granted they may be old stock at this point that was made back when the truck was made. I hope they keep them in a cold storage facility!
Yup. Youre intuition is correct. All of the plastic will biodegrade at some point, but, it's accelerated in the engine compartment due to heat. In the case of the Mercedes, they had one minor flash of forethought in that the engine harness is a sub-harness of the whole system - connected to the main harness via connectors. You still have to dig all throught the thing to replace it, but, at least there's no soldering needed.
My truck has been parked outside in the sun for most of it's 19 years in Los Angeles. It started degrading within a couple years of the time I bought it new, and at this point I have replaced most of the hard plastic parts in the cab at least once. The plastic just crumbles away. Thankfully it does not include the insulation of the wires, but does include door handles, door latches, trans linkage, window knobs, dash board, dome light, etc. Just more planned obsolescence as far as I can see.
"We often had problems with hoses and seals (among many other problems). It turns out that the British were still using natural rubber and that it did not hold up as well as synthetic rubber."
Naperlou, I understood that heat bearing capacity of natural rubbers is very low. We have rubber plantation and during drying process, some of them get melted. By adding other components to make synthetic rubber can increase their thermal withstand levl.
Altair has released an update of its HyperWorks computer-aided engineering simulation suite that includes new features focusing on four key areas of product design: performance optimization, lightweight design, lead-time reduction, and new technologies.
At IMTS last week, Stratasys introduced two new multi-materials PolyJet 3D printers, plus a new UV-resistant material for its FDM production 3D printers. They can be used in making jigs and fixtures, as well as prototypes and small runs of production parts.
In a line of ultra-futuristic projects, DARPA is developing a brain microchip that will help heal the bodies and minds of soldiers. A final product is far off, but preliminary chips are already being tested.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.