I decided to show the major differences between the 6.2 Diesel Head Gaskets and the 6.5 Turbo Diesel Head Gaskets. I think the gasket blew due to saturation from the coolant soaking through the gasket material, to the fire ring and eventually it rusted weakening it allowing the combustion pressures to blow through. I will before installing the Heads rub some Black RTV Silicone around the inside of each end coolant port of the Head Gaskets and around the coolant ports right above the Cylinders in hopes it creates a barrier between the Head Gasket Material and the Engine Coolant preventing leak in and prolonging life. I have not fully set on using the 6.5 Head Gaskets and are thinking about buying a Mahle 6.2 Gasket Set and comparing them also. I am also considering that using the 6.5 gasket will change the fire rings sealing surface by moving it outwards to a different location than the 6.2 gaskets original orientation possibly changing how or its ability to seal effectively. I have alot to think over and consider. A crazy thought crossed my mind of further lowering the compression ratio by using the 6.5 Head Gaskets then tracing a line arond the Fire Ring in the Block and then use some Cylinder cutting tool or a big Valve Seat cutter to cut at a 45° angle around the entire Cylinder up to the line. I fully believe this would work and would indeed lower the compression significantly if using a 6.2 Block w 6.5 Gaskets and Heads; now to say if it would be harmful or detrimental for the engine I don't know, thats why i said I had a crazy thought lol I was going to full send the ARP Studs to 130ft lbs but honestly it might be too much so may stick with my previous tourqe of 120ft lbs. ARP says to 90ft lbs using thier lube and a max of 110ft lbs. I would assume by me over tourqing them 120ft lbs they stretched a bit and are probably weaker than before. ***(((Upon further inspection of the old Head Gaskets I saw signs of Pinching and Cutting of the Gaskets due to I believe excess Clamping Force. I am now reconsidering my Final Tourqe Number as before I did 120ft lbs.***(((Also upon further inspection I realized the areas to which were being pinched on the old 6.2 Head Gaskets would not occur on the new Mahle 6.5 Head Gaskets due to those areas now being Reinforced. I recommend now for those who use ARP Studs to 120ftlbs using Std 6.2 Head Gaskets or 10 over you might consider going to 110ft lbs so the Clamping Load doesn't Cut, Squish or Distort the Head Gaskets but if using 6.5 Head Gaskets 120ftlbs may be acceptable. At this point I still need to clean the top part of the Cylinders and Polish them, clean and Polish the Piston Tops, need to pull the Lifters out, Inspect the Camshaft and determine if it has wearing (if it does and needs replacing I'll be buying the HT4 Performance Cam and putting that in and new Studs with it) lube and install the new Lifters then decide on what Head Gaskets I should use in order to move forward with the reassembly process. If anyone has experience with using 6.5 gaskets on a 6.2 w 6.5 heads please feel free to chime in and let minnow how they performed or what not. Update: On Unique Diesels site they recommend using Std or 10 over Turbo 6.5 Head Gaskets on a 6.2 Block using 6.5 Heads so I feel better and more confident using them.
14 окт 2024
