Kind of hard to say where the oil cooler really is, They seem to move them around alot some times, But I am thinking it is mounted at the rear of the engine and the inlet hoes is going too it like in this link see number 22 and 11. http://www.mercruiserparts.com/Show...r=2697&bnbr=110&bdesc=Standard+Cooling+System. Also the leak down test is really a good idea if you can not find any that stands out in all your other testing, I know it is kind of a pain in the rear to do, But if you can't find any thing eles then yes you will need to do it because now a days it is just as important, If not more then a Compression test.
Kind of hard to say where the oil cooler really is, They seem to move them around alot some times, But I am thinking it is mounted at the rear of the engine and the inlet hoes is going too it like in this link see number 22 and 11. http://www.mercruiserparts.com/Show...r=2697&bnbr=110&bdesc=Standard+Cooling+System. Also the leak down test is really a good idea if you can not find any that stands out in all your other testing, I know it is kind of a pain in the rear to do, But if you can't find any thing eles then yes you will need to do it because now a days it is just as important, If not more then a Compression test.
i managed to found the water inlet in the gimbal housing and followed it to the oil cooler and then to the stat, water pump, manifolds and risers..however i dont think i iwll manage to clean the oil cooler..it is so far back
No you should not need too in most cases, Just try one part then the other. Just buy [OEM] parts and every thing should work the same. What style gauges do you have??? I am sure you do not have a old/new gauge sitting around to try first, But that is what we sometimes do first before just adding parts all over the place. Also keep in mind if the temp sending unit is not getting the right ground it will do this, And the gasket might stop the grounding if sealant was used at the thermostat housing Gasket.ohh ok i found it but as you said it is next to impossible to clean the hoses back there..no space to move and the heat makes it even worse
i checked the stat temp while running (140 stat not 160) with a laser temperature reader (like the ones u showed in the linked u sent me) and found a huge difference between it and the gauge..at idling it reads approx 120 when my gauge is reading 150..at 3800k it reads 140 when my gauge is reading 175..
i will be taking the termo sender in the stat and checking it out..if either the gauge or the sender unit is the culprit do u have to change them altogether for them to be compatible?
Thanks
