how to seal fittings of oil cooler? (urgent answer needed)

Pharmacist · 07-28-2010, 06:45 PM

i'm gonna be installing my z1 motorsports cooler tomorrow morning, and i have a question. neither the instructions nor anywhere on this forum does it state how to seal all the various fittings that connect the hoses to the sandwich plate and oil cooler so they don't leak. would teflon tape be ok, or threadlock, or what else?

370Zsteve · 07-28-2010, 06:47 PM

Quote:

Originally Posted by Pharmacist

i'm gonna be installing my z1 motorsports cooler tomorrow morning, and i have a question. neither the instructions nor anywhere on this forum does it state how to seal all the various fittings that connect the hoses to the sandwich plate and oil cooler so they don't leak. would teflon tape be ok, or threadlock, or what else?

Teflon tape. Do NOT over-tighten.

WarmAndSCSI · 07-28-2010, 06:48 PM

Teflon tape or white Teflon sealant (paste) will work. These only go on the NPT-type (tapered) threads and never on AN fittings.

And to add to the above 1/2-3/4 turn past hand-tight is enough to seal an AN fitting. 2-3 turns after hand tight for the tapered NPT threads.

Pharmacist · 07-28-2010, 09:28 PM

Quote:

Originally Posted by WarmAndSCSI

Teflon tape or white Teflon sealant (paste) will work. These only go on the NPT-type (tapered) threads and never on AN fittings.

And to add to the above 1/2-3/4 turn past hand-tight is enough to seal an AN fitting. 2-3 turns after hand tight for the tapered NPT threads.

so the npt threads are the ones between the adapters and the oil coolers, and the adapters and the sandwich plate, right? these take teflon tape. and the an fittings do not take any sealant. are they self sealing and won't leak?

Trips · 07-28-2010, 09:30 PM

Quote:

Originally Posted by 370Zsteve

Teflon tape. Do NOT over-tighten.

Pharmacist · 07-28-2010, 09:35 PM

Quote:

Originally Posted by Triple's

approximately how much torque are we talking about? 20 lb feet? the same as the oil drain plug?

cab83_750 · 07-28-2010, 09:50 PM

I used Teflon white tape all around. No issues so far.

Can't hurt!

WarmAndSCSI · 07-28-2010, 10:46 PM

Quote:

Originally Posted by Pharmacist

so the npt threads are the ones between the adapters and the oil coolers, and the adapters and the sandwich plate, right? these take teflon tape. and the an fittings do not take any sealant. are they self sealing and won't leak?

100% Correct.

Quote:

Originally Posted by Pharmacist

approximately how much torque are we talking about? 20 lb feet? the same as the oil drain plug?

No, absolutely not that much torque. As I outlined, NPT threaded fittings only need 2-3 turns past hand tight. That usually ends up being just 10-12 lb-ft. AN fittings need even less (think 3-4 lb-ft maybe). Less than a turn past hand tight.

Modshack · 07-29-2010, 09:46 PM

The only thing on a cooler system that needs sealant would be the NPT fittings into the cooler if you use that type. A high temp paste sealant seems to work best. AN fittings use no sealant at all as the seal occurs in the tapered fit and not at the threads. The Mocal fittings have seals on them (provided you bought the recommended ones from Mocal) and don't need anything additional. That's all in my DIY BTW..

07-28-2010, 06:45 PM	#1 (permalink)
Pharmacist A True Z Fanatic Join Date: May 2009 Location: Toronto, Ontario Posts: 1,249 Drives: 09 370z Sport 6MT Rep Power: 18	how to seal fittings of oil cooler? (urgent answer needed) i'm gonna be installing my z1 motorsports cooler tomorrow morning, and i have a question. neither the instructions nor anywhere on this forum does it state how to seal all the various fittings that connect the hoses to the sandwich plate and oil cooler so they don't leak. would teflon tape be ok, or threadlock, or what else? __________________ 2009 370z Sport Touring/Nismo shift Knob/Z1 motorsports 34 row oil cooler

07-28-2010, 06:48 PM	#3 (permalink)
WarmAndSCSI A True Z Fanatic Join Date: May 2010 Location: SLC, UT Posts: 1,671 Drives: '08 Evo X \| '10 370Z Rep Power: 18	Teflon tape or white Teflon sealant (paste) will work. These only go on the NPT-type (tapered) threads and never on AN fittings. And to add to the above 1/2-3/4 turn past hand-tight is enough to seal an AN fitting. 2-3 turns after hand tight for the tapered NPT threads. __________________ '10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake '08 Evo X - built motor+trans \| BB-X @ 32 psi \| CH3OH \| self-built+tuned - ??? WHP '01 Galant V6 - built motor \| GT35R \| self-built+tuned - 550+ WHP (retired)

07-29-2010, 09:46 PM	#9 (permalink)
Modshack A True Z Fanatic Join Date: Mar 2009 Location: Greenville NC Posts: 2,883 Drives: 370Z Sport Rep Power: 976	The only thing on a cooler system that needs sealant would be the NPT fittings into the cooler if you use that type. A high temp paste sealant seems to work best. AN fittings use no sealant at all as the seal occurs in the tapered fit and not at the threads. The Mocal fittings have seals on them (provided you bought the recommended ones from Mocal) and don't need anything additional. That's all in my DIY BTW.. __________________ Steal my car! (SOLD)...Now Porsche Cayman S Oil Cooler DIY: Here! Last edited by Modshack; 07-29-2010 at 09:49 PM.

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07-28-2010, 09:50 PM	#7 (permalink)
cab83_750 Track Member Join Date: Apr 2009 Location: CA Posts: 887 Drives: 09 NISSAN 370Z Rep Power: 417	I used Teflon white tape all around. No issues so far. Can't hurt!