Fixmyvw.com

Author Topic: External oil cooler hose size  (Read 336 times)

September 30, 2018, 06:44:36 pm

slow and ratty

  • Newbie

  • Offline
  • *

  • 7
    • View Profile
External oil cooler hose size
« on: September 30, 2018, 06:44:36 pm »
  I have a Vanagon 1983 with 1.6D na engine.  Adding external oil cooler.  I got all fittings from local hydraulic shop.  I thought I was supposed to get 5/8 ID hose, but doing more reading it seems like 1/2" ID is better.  I already bought 5/8".  Is that too big?  Will my oil pressure suffer?  Mounting cooler in front of transmission and using thermostatic sandwich plate.  New to this.  Any feedback greatly appreciated.



Reply #1October 05, 2018, 08:19:15 pm

slow and ratty

  • Newbie

  • Offline
  • *

  • 7
    • View Profile
Re: External oil cooler hose size
« Reply #1 on: October 05, 2018, 08:19:15 pm »
I'll try the 5/8 and report back on any issues.

Reply #2October 05, 2018, 11:10:28 pm

ORCoaster

  • Veteran

  • Offline
  • ***

  • 3606
  • Personal Text
    Restoring a Caddy and cleaning the Rabbit for sale
    • View Profile
Re: External oil cooler hose size
« Reply #2 on: October 05, 2018, 11:10:28 pm »
5/8ths sounds to large for my tastes.  That sounds more like water cooling size.  I used a sandwich between the flange and filter for an external Frantz cooler and I think the inside diameter of that hose was closer to 1/4 inch.  Once it got to the external filter it had a sleeve in the inlet that dropped the diameter down to 1/16 I believe.  b
But that particular filter is not designed to have a huge flow going into it.  You are also looking for flow to cool the oil so I would venture a guess that you are a bit big on diameter.  Maybe drop a couple of 8ths and go with a 3/8th if you find you lack pressure. 

The oil pump only can produce a given volume depending on RPM.  Flow is a measure of a combination of pressure and diameter of hose.  A given volume will be at a higher pressure with a smaller diameter hose.
Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

Reply #3October 13, 2018, 08:01:58 pm

slow and ratty

  • Newbie

  • Offline
  • *

  • 7
    • View Profile
Re: External oil cooler hose size
« Reply #3 on: October 13, 2018, 08:01:58 pm »
Thanks a million.  I have already purchased 5/8 to 3/8 hose reducers.  The fitting for the oil cooler are 5/8 so that is what I was going with but that could be for a Jaguar or something.  Peace

Reply #4October 16, 2018, 07:07:31 pm

ToddA1

  • Veteran

  • Offline
  • ***

  • 430
    • View Profile
Re: External oil cooler hose size
« Reply #4 on: October 16, 2018, 07:07:31 pm »
Iíve run 5/8 in the past, with no issues.

-Todd

Reply #5November 22, 2018, 10:32:58 am

slow and ratty

  • Newbie

  • Offline
  • *

  • 7
    • View Profile
Re: External oil cooler hose size
« Reply #5 on: November 22, 2018, 10:32:58 am »
Good to know thanks. 

 

Canada Catalys