whatchagonnado wrote: ↑
Thu Jun 25, 2020 8:06 pm
Well, not a good day getting everything disassembled. First time on this engine had me talking to myself and walking away several times. Finally, got the thermostat output and input tubes removed. This was the second time. Assume a dealer first time replaces timing belt & water pump at 80,000. What I noticed was they used a black RTV type sealant instead of gaskets. I have checked parts stores and a gasket is sold for the thermostat tube but not for the other. Looked at the Infinity part exploded view and did not see mention of a second gasket option.
I can't believe Infinity would not have gaskets available for reassembly. There is so much labor to put it all back together prior to filling the system then starting, pressurizing then checking for leaks. If someone knows if two gaskets are available or is using Black RTV the standard assembly practice.
Thank you for any input or suggestions.
Stop short of the oil pan, that part is completely unnecessary!
Even being a seasoned tech, the first exposure to a J30 12 years ago had me walking off multiple times, literally the car got parked for months on 2 occasions before digging in and figuring out there IS logic to the way its put together, its a damn good, but complicated car, once you get past the leather that never seems to hold up.
As you have already figured out the front crank seal requires timing belt removal, time to check the 3 idlers for noise and replace the CAM seals as well, as THEY are most likely the leak dripping down and slinging, all seals are the same, ( I buy 6 so its not so frustrating when one gets ruined...) Shop @ Rockauto.com. I just did one of these the other day.
Make darn sure all the timing marks are aligned before disassembly (the bottom is a b**** to figure out the first time) Use a gun on the cam sprockets with the belt still on
You do have the radiator out of the way already? You want much room.
Already covered but confirming, all water pipes come from the factory with grey RTV, all I use is ultra grey. The thing was not designed with gaskets in that location.
This engine, once you get used to it, is a fine piece of engineering (no sarcasm) you will not encounter coolant leaks if cleaned up well (change the stubby hoses, weird size but obtainable as bulk hose)
Unfortunately the first or second time in the timing cover of one of these will be unpleasant. You will
be back here asking about timing belt tensioner adjustment, its not as hard as it sounds but first will be getting the cam sprockets off, watch the passenger side cams, they are teetering on cam lobes and want to spin away hard if moved more then a few degrees. This IS a interference engine, never bent a valve even letting the cams slip/spin but be careful.
As for the other short items, what can not be found on rock auto will need to be gotten from the junkyard, getting harder to find them, but honestly, this is your only option. Just for random knowledge, the 300zx non turbo shares this engine, 1990-96 z 1993-97 j30 There are small differences but same engine.
Yes the thermostat is bent/disabled, this car is track only.