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Message: [QUOTE="mandkole, post: 1081864, member: 4630"] The 436 is an option and better than what you have. However, it was spec'd as a power steering hose at a major truck OEM once upon a time and was upgraded due to heat/impulse related hose/coupling interface issues and cover cracking. The updated 437HT is used today but still sees returns for cracking. IMO, tube delam is primarily a tube extrusion quality issue that can be driven by heat aging. Injectors or hydro-electric valves, it kills them all the same. It was a much bigger issue back in the day with high heat applications and lower quality hose. The high wire pack PTFE hoses supported fears, didnt fail and Aeroquip ran the Navi contract. Keep in mind, fuel attacks rubber much more aggressively (vs oil), I'd think the tube issues would be a more likely with fuel hoses (with similar injector consequences). Has tube delam occurred on an HPOP application? The same OEM above approved our MT3000 hose for a rack/pinion steering program, but it was cancelled early with rack reliability issues. We are working on the intergral gear program now. Im not trying to sell you a hose, but just trying to provide some industry insight and information. [/QUOTE]

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