North American Turbocoupe Organization



Oil drain thread size
John B Offline
Member
#1
I’ve searched and can’t find the answer; what’s the thread size for the oil drain line going into the fitting on the engine block? I’m installing an aftermarket turbo with a custom drain line. My plan is to run a line off the turbo into a new hose connection that fits into the stock fitting but I don’t know the stock thread size. Thanks!
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
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MortifydPenguin Offline
Junior Member
#2
I know the threads on the block itself are 3/4 NPT. i want to say they fitting is 1/2 but i cant remember. when i upgraded my line i just used a -12an to 3/4NPT Connector on the end of my hose, and got rid of the fitting. you can also replace the fitting with a 3/4 to whatever size line you want to run. see the link below.

http://www.jegs.com/i/Aeroquip/023/FBM2448/10002/-1
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John B Offline
Member
#3
MortifydPenguin Wrote:I know the threads on the block itself are 3/4 NPT. i want to say they fitting is 1/2 but i cant remember. when i upgraded my line i just used a -12an to 3/4NPT Connector on the end of my hose, and got rid of the fitting. you can also replace the fitting with a 3/4 to whatever size line you want to run. see the link below.

http://www.jegs.com/i/Aeroquip/023/FBM2448/10002/-1

Perfect; thank you!
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
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