2016年11月4日 · While aluminum may provide a weight savings, cast iron provides the longevity needed in this application. Up until 2013 when GM stopped placing the LSx series engines in vehicles, they utilized an iron block for their pickup trucks. It was the same block design as the aluminum variants, but was more heavy duty for their intended purposes.

2016年2月23日 · Over the years the move has been made from all gray cast iron engines (with even cast iron pistons) (40HP / liter total cylinder capacity) to cast iron cylinder blocks with aluminum heads (50-60 HP/L, to all aluminum engines (cylinder block plus head) up to 80 HP/L (atmospherical engines) Nowadays there is an tendency to switch to nodular cast ...

2017年12月3日 · Aluminum allows for lighter vehicle weight. Getting more power out of small engine necessitates increasing compression ratio. Greater vehicle fuel economy is the result of engine downsizing. Some engine systems run the coldest coolant through the (hottest) heads before circulating it to the block in order to make more power.

2011年5月31日 · If out of spec, the block deck would need to be resurfaced, which when all is said and done, will raise compression by decreasing the cylinder volume but retaining the same bore and stroke. Furthermore, if the block is made of cast iron and the head is aluminum there is a good chance that by torquing down the new aluminum head to a non-level ...

2015年6月3日 · Refill the system with the appropriate mix of coolant and distilled water. Use a modern "long-life" orange coolant if you have an aluminum cylinder head, block, or both--green coolant promotes corrosion in aluminum.

2018年2月22日 · This is a 1979 Leyland Sherpa 230 1.7 L Petrol "O-series" engine. I'm suspecting a blown head gasket and if this is confirmed I'll be removing the aluminium head and getting it resurfaced at the engineers. I've read and it makes sense that the aluminium head is more vulnerable to warping than cast iron due to its material properties.

To change them I’ll have to remove the timing belt cover, exposing the side of my engine block. It looks like it has accumulated dirt and what looks like some rust (only on the crankcase, I’m guessing it’s made from cast steel and the cylinder block made of some aluminum alloy) and if possible I’d like to improve the looks of it.

2019年3月8日 · What is the likelihood of a cast iron block needing resurfacing along with its aluminium head? Hot Network Questions Some instruments (e.g. banjo and electric bass) can be fretted or fretless, other instruments are always fretted or always fretless.

2017年5月30日 · This engine's (Skoda Estelle/120, 70s, RWD, rear mounted engine) head is cast iron, the block is aluminium and I'm checking it's flatness. What would be the correct flatness clearance range? I have seen a few sites, but none says it in a straight and specific way, they all say "use a feeler gauge" and that's it. But, what's the correct numbers?

One of the rocker fingers (the one that touches the valve stems, and have cam rollers) on my diesel engine head has broken. This resulted in the pistons hitting the valves due to the missed timings. The entire issue has caused me an engine re-haul. But, as part of the repair, I have been asked to machine the head-block face.