Looking for help on my 4g64/4g63 build. Routing turbo feeds

[bizie]

So I realise every 4g63 i have owned has been tampered with so im unsure of the correct routing for the turbo lines. First thing is, the oil port off the head. I have seen these blocked before. Is this safe? Why do people block them off? The 7 bolt car I bought feeds the turbo from a after market steel braided line by the oil filter, a 6bolt I saw feed the turbo oil from the head port? I've never even seen a oil line coming from the head there on any of my 4g63's? It has always been a bolt plugging that spot. Why is this? How is it from the factory?

The way I've always seen the turbo coolant lines is feed from the lower thermostat housing nipple and returned to the hard pipe near the thermostat. Is this correct? That car is my 97 7bolt FWD with a 16g setup. Also, it has the coolant line from the block going to the oil filter housing. Is this correct?

My 4g63/4g64 build has a plug in the block where the banjo bolt goes for the coolant. I figure no big deal, I'll take the fittings out of my 7bolt. Well, they're too small. So do I need to order a 4g64 fitting to complete the coolant flow from the oil filter housing to the block? Why did this block have a plug there?

No you see, now I am confused. Could anyone clear up those few questions for me?

 

[19Eclipse90]

First thing is, the oil port off the head. I have seen these blocked before. Is this safe?
Why do people block them off? The 7 bolt car I bought feeds the turbo from a after market steel braided line by the oil filter, a 6bolt I saw feed the turbo oil from the head port? I've never even seen a oil line coming from the head there on any of my 4g63's? It has always been a bolt plugging that spot. Why is this? How is it from the factory?

The oil port off the head was the original feed for the turbo for 1G cars. The 2G originally fed the turbo from the oil filter housing. When feeding from the oil filter housing, the head port must be blocked off. Where you are feeding from depends on the type of turbo and the recommended operating pressure it should see based on the manufacturer's specifications. MHI turbos are generally fed from the head.

The way I've always seen the turbo coolant lines is feed from the lower thermostat housing nipple and returned to the hard pipe near the thermostat. Is this correct? That car is my 97 7bolt FWD with a 16g setup. Also, it has the coolant line from the block going to the oil filter housing. Is this correct?

My 4g63/4g64 build has a plug in the block where the banjo bolt goes for the coolant. I figure no big deal, I'll take the fittings out of my 7bolt. Well, they're too small. So do I need to order a 4g64 fitting to complete the coolant flow from the oil filter housing to the block? Why did this block have a plug there?

First, the 2G turbo was originally fed coolant from the block at the location you are seeing the plug. The parts needed for that hole can be found here: 2g Block Coolant Line

Second, how it is all supposed to be: oil to turbo coolant lines question, 4g64 block.

As for the fittings being too small, that may be a result of what year 4G64 block you have: 4G64 Hybrid Coolant Plug/Turbo water line

 

[bizie]

Thanks you sir! That was very helpful!

I am just going to use a t-fitting at the thermostat housing and use that to feed the oil filter and turbo. Initially, that is what I was thinking, but I like to over think things and second guess myself.