CSAlltrac wrote:+98 5S Block: Where do you tap for turbo oil feed? Do you have to modify any oil passages? Will the new gear on an OE oil pump for the 5S be the one I want to use or should I use my 2nd gen 3S gear?
Turbo oil feed is in the same place as on gen2/3 blocks.
Its a smaller hole/thread though... maybe the same as the gen3, i dont remember.
Youll need to block up the oil feed for the balance shafts (if it had them).
Tap and grub screw does the job.
From memory youll want to use the gen2 oil pump pulley on a 5S pump.
Even if they tooth count is the same, the 5S and 3S have different cam belt tooth profiles.
Ok, keep in mind the mains will probably have to be line-bored which adds some extra cost.
Gen2 Water Pump and hardlines with Gen2 oil cooler in place.
Gen2 oil cooler wont bolt on.
You could use the 5S oil cooler (if it comes with it).
Or better... setup a remote oil filter and cooler.
Gen2 Head: What mods are needed for the head gasket?
Not sure about this one.
Using the ATS head gasket is probably the easy way out.