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Old 03-03-2008, 12:06 AM   #1
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Default Greddy oil lines

Thanks everyone for helping with my previous questions about stuff - I just picked up a very lightly used base greddy kit!
It's usually a mistake to ask multiple questions in one thread since the never all get answered but I have three similarily related questions so here goes:

I seem to rememb hearing something about one or the other of the oil lines not being very good. Can anyone confirm/deny this?
The oil feed line is SS and the drain line is a rubber hose w/ a SS sheath that just gets attached w/ hose clamps...

Next question: assuming the drain line is OK to use, could I put a Tee in-line for my oil temp gauge? Would the sender work on this line? This is the best thing I can find:
http://www.autometer.com/cat_accesso...il.aspx?vid=49

Last question: the kit I got didn't come with a fitting for the drain line for when you drill and tap the oil pan - the previous owner used the existing hole on the other side of the block. The greddy drain line is pretty large - could I just use a Hose barb to threaded fitting when I tap the pan? Does anyone know what size I should drill/tap the pan for??

Thanks!
-Ryan

Last edited by ThePass; 03-03-2008 at 01:11 AM.
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Old 03-03-2008, 02:02 AM   #2
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im running the stock greddy oil return, works fine so far,
there are a few other members that have had it for near 10k miles with no issues

i don't know if u want to take the temp of the oil coming from ur turbo,
it wont give u an accurate reading of the whole motor,
it will just tell u the oils stupid hot because it just went through the turbo

as for the last question,, ive got nothing
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Old 03-03-2008, 12:56 PM   #3
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Quote:
Originally Posted by ThePass View Post
Next question: assuming the drain line is OK to use, could I put a Tee in-line for my oil temp gauge? Would the sender work on this line? This is the best thing I can find:
http://www.autometer.com/cat_accesso...il.aspx?vid=49
-Ryan
Hey Ryan,

Some people get an oil temperature reading by using an adapter in the oil drain plug. I found this one before I saw one that Autometer sells. I imagine either one would work fine.
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Old 03-03-2008, 01:33 PM   #4
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Indeed. The stock oil supply hose that Greddy furnishes you, while not ideal in terms of routing, appears to be of reasonably good build quality. Just don't tighten that little adapter down into the block too hard- they break easily.

If you do some searching, you'll find a lot of threads on the oil drain. Everything from a barb fitting and some rubber hose to fully pimped-out designs using AN fittings and stainless-braided hose. My personal setup is a 3/8" NPT to -8AN adapter in the pain, a hose with a 90 -8AN fitting at the pan end and a straight 1/2" NPT fitting on the turbo end, and a drain flange bolted to the turbo with a 1/2" NPT female thread.

As to the oil temperature sender. I ran a sender in the oil drain hole for a while, but I was always afraid of it being damaged by road debris. When I re-designed my oil cooler setup recently, I relocated the temp sender to a small sandwich plate under the oil filter. Specifically, it is after the oil cooler (which is an OEM 1.8 water-oil type) so it shows me the temperature of the oil actually going up into the engine. There's a lot of debate as to whether this is better or worse than knowing the temperature of the oil sitting in the pan, but you could just as easily put such a plate before the cooler as after it.
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Old 03-03-2008, 02:11 PM   #5
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Awesome thanks for the replies! I'll deffinatley use the oild drain plug adapter.

I'm going to relace my whole drain line. I've found almost everything I need on anplumbing.com: 1/2" Superstock hose and -8AN to Push to Lock fittings.
Can someone please confirm that this Superstock hose is OK for use as a drain line? It says it's rated for 250 psi and 250* F continuous use.
http://www.anplumbing.com/shop/index...r!_Stock!_Hose

And my only question is, where can I find a reasonably priced oil drain flange for a greddy turbo so I can thread something onto it?

Thanks!
-Ryan
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Old 03-04-2008, 12:20 AM   #6
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For the drain flange, I think that you want one for a GT25. Perhaps someone with a better memory will confirm.

I bought mine from an eBay vendor (Function7) which currently doesn't have any on offer, though something like these should also work: http://www.atpturbo.com/Merchant2/me...egory_Code=BCS
http://cgi.ebay.com/ebaymotors/GT25R...3756.m20.l1116
Try to get one with a gasket.

Pretty much any braided S/S hose will work for the drain. Yes, you're going to exceed the temp rating, but since the hose isn't under pressure or mechanical strain I can't imagine it failing dramatically.
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