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AlbatrossCafe posted a topic in Nissan L6 ForumI recently re-routed some coolant lines on my L28ET. On the passenger side of the engine, I removed a 3-way bypass valve and 3-way fitting out of the rear of the engine and replaced it with a 2-way valve at the rear of the engine. I have seen other engines like this and read it would be OK as long as I don't go crazy while the engine is still cold. Problem: After the engine is warm, the Temp gauge sits PEGGED at 250 degrees while driving. I was initially very concerned, but what I noticed is that while idling, it goes back down to it's normal operating range of 180 degrees! As I move, it climbs again (fairly rapidly). My gauge was working fine before I re-routed my coolant hoses. Also, my heater works so I know coolant is flowing through there. Where is this temp gauge? Is it absorbing hot hair from somewhere else? Any ideas why this might be happening? Here is how I re-routed my lines. From this: To this:
Inspired by the Head cooling on cylinder #5 thread (http://forums.hybridz.org/topic/59029-head-cooling-on-cylinder-5-solutions/), I decided to make my own diagrams of the cooling system for US Z/ZX L6 engines. I had to exaggerate and diminish a few proportions to maintain decent flow while using a flat layout. These charts are as accurate as far as my knowledge and research have shown so far. I will gladly accept any corrections and update accordingly. The year cutoffs are approximate and do not reflect all of the small month-to-month changes of course. On the ZX diagrams, some cars got the throttle body heaters while others didn't. I left them in both diagrams just to cover all the bases. I did spend a fair bit of time on these, so if they do happen to find their way elsewhere on the web, make sure at the very least to cite where they came from. Red = oil passages Blue = water passages and flow direction Yellow = direction of water flow in flexible hoses 1970-1974 240Z / 260Z 1975-1978 280Z 1979-1980 280ZX 1981-1983 280ZX
Im in a process of replacing my intake manifold and fixing some issues on my l28et swapped 280z. What i noticed is that the coolant like on the side of the block feels really rubbery and soft like they are about to burst. While I'm at it I decided to replace the lines just to be on the safe side. Basically all the line that run on the passenger side of the block but without the heater core lines that go into a cabin. I dont know where to get all the lines so I tough about replacing them with silicone ones and I wanted to know your thought on this. Did anyone done that before and if so do you have pictures or where can i find a replacement for the stock ones. Thanks guys