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Gotchas & Tips - 2JZGTE
There are several theories on why some cars blow their crank seals regularly, some even running stock boost.
This one (click on 'oiling bypass') blames the design of Toyota's oilfilter system.
This one blames the oil pressure in a less convincing way.
In any case excessive blowby gases will build up pressure in the crankcase and won't do the seals any good. Here is how to check the condition of the one-way valve - or as Toyota calls it, PCV valve (Positive Crankcase Ventilation)
Disconnect the hose on the camcover side and hook the test hose, attatched to an air compressor. Be very careful, you don't want to blow it to bits, just pressurise it up to 2 bar max. If it holds the pressure, then the valve is doing it's job and won't allow the camcover to become pressuirsed.
You also have to do the 'suck' test.
This is how you do not want to test it. The air column is compressible so this setup might show "airflow" when there is none
In one word: Junk, in the proud tradition of aftermarket parts that don't have to pass any quality or reliability standards. Buyer beware.
Soft as butter.
AEM cam gears are not much better either, they are famous for losing their settings as the friction provided by the 3 bolts is inadequate.
This guy even made a page on the subject (local copy here)
This is the correct place if you need to tap into the boost signal (installing a boost gauge, pressure switch etc...)
Do not use the one next to it because you risk engine meltdown if it pops off under boost - the FPR also uses that one, better leave it alone!
Yes, there is an alternative to Toyota's Type T-IV, it's made by Mobil named ATF 3309
High end missing could be attributed to these corroded little fellows. The damage can be hidden underneath the protective layers, so do not assume that they are healthy just because they look OK.
Years of baking heat take their toll on the insulation, and every time the plugs are changes these are disturbed and can potentially break apart.
If in doubt replace them, or take the time to rewire them. Well worth it.
Picture courtesy of Stuart Hagen
....on to Resources
