Is there a part number that indicates year of manufacturing stamp on replacement exhaust manifolds. Anyone have one lying around or in stock they can look at?
I finally got time to looking again for my tick. BINGO
This time my smoke machine redesigned with fittings (no tape) held pressure really well. Was put out a good amount of smoke too. Again I could not see any smoke. Possible a better light would have helped. I was able to faintly hear a hiss, difficult as compress was sitting near PS, but sound appeared on DS.
Hearing hiss, I then turned crank shaft to see if pitch would change, it did not. So I assume this was not just air passing by exhaust valve.
But I really wanted to pin point the tick, so grab a spray bottle & dish soap. I turn up the air pressure to 40 PSI and started spraying from underside rear working my way forward (less water in the face). Couldn't see anything.
I then started at front top side from wheel well, Bing go. I saw something on #1 tube at weld, but was very faint. I grabbed up some more flashlights (LED) and drop light. Using a mirror to get a better look., I spray a ton of soap water on area. Although faint, I'm now sure it's nothing more than the typical weld at tube to manifold plate leak.
I was sure of this leak being DS on first inspection.
@Ali FJ80 first though was this as well. But what keep me looking, is, I wanting to pin point. MyLexus records for this vin # shows Dealer replaced. Christo at Slee Off Road said to me once; "they've never seen one leak again, once it's been replaced" nor have I. My concern has been that this could be valve gap (not a big deal), or something serious internally.
The tick goes away in 90 seconds after warm up, so not concerning since I now know what it is for sure.
So is this a fluke, did Lexus Dealer use old stock or was the issue never corrected and just charge to PO???



Unless there's a part number on it, that indicates year of manufacturing, I'll never know.