sandpiper Posted October 5, 2012 Report Share Posted October 5, 2012 I am just finishing my 5 year hose change and want to share a couple of problems found that, if not corrected with new hose, could have led to serious problems; 1. The oil hose that runs from the bottom of the engine to the oil tank was routed (from the factory) such that it was against the firewall prior to entering the tank. About 2 inches up the firesleeve from the tank attachment I noticed a hole worn in the firesleeve. When removing the firesleeve I found that the hole was also worn into the oil hose itself. At the point of contact with the firewall is a very small bolt head which was the culprit. I rerouted the hose which not only solved the problem but also shortened the hose. The original installation was very tight up against the firewall and none of this was visible without removing the hose. Since I run 95% mogas the tank has never been removed for cleaning until now. Even though the tank was perfectly clean as expected, hindsight indicates this was poor practice. Total time is 311 hours. 2. The water hose from the top rear left cylinder is one of many running to the little tank on top of the engine. Unlike most of the other hoses that accomplish this in a pretty straightforward manner, this hose makes about a 150 degree reversal to enter the tank. It is one of two hoses with an internal spring facilitating a turn. There is also a piece of firesleeve on the outside of the bend held in place with plastic ties. Once the hose was off, I straightened it and noticed a hole worn about halfway through the hose on the inside of the bend. This was not visible when the hose was on the engine and was only visible when the hose was straightened and forced to lay flat. At first I thought it was from one of the plastic ties being too tight but I don't see any other marks from that tie on the hose. Also, since this is inside a crease in the hose caused by the bend (making it invisible until straightened), the plastic tie would have been held in that crease which was not the case. Again, this was a factory installation. Anyhow, the hose change turned out to be a usefull exercise, at least in my case. Link to comment Share on other sites More sharing options...
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