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Oil Cooler Repair
OM616 Offline
10mm MW
****


Posts: 528
Joined: Jul 2009
Location: Michigan
#1
Oil Cooler Repair
I had to change my oil cooler lines and of course the cooler threads stayed in the nut on one of the fittings.  Angry

This is how I fixed it..  I cut off the striped threads and machined it flat. Then taped it with a 5/8-11 tap.  Then I made a brass male to male adapter with a class 3, 5/8-11 thread on one end and a M22X1.5 thread on the other.

   

   

   
04-23-2017, 10:32 PM
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daniel Offline
Naturally-aspirated
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Posts: 3
Joined: Mar 2017
Location: United States
#2
RE: Oil Cooler Repair
Awesome! I'll be keeping this in mind, my lower line is leaking.
05-10-2017, 10:31 AM
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martureo Offline
GTA2056V
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Posts: 86
Joined: Mar 2012
Location: Maryland/DC Metro
#3
RE: Oil Cooler Repair
(04-23-2017, 10:32 PM)OM616 Wrote: I had to change my oil cooler lines and of course the cooler threads stayed in the nut on one of the fittings.  Angry

This is how I fixed it..  I cut off the striped threads and machined it flat. Then taped it with a 5/8-11 tap.  Then I made a brass male to male adapter with a class 3, 5/8-11 thread on one end and a M22X1.5 thread on the other.

I hate to tell you this now but Mercedes already has this as a solution.  Drill 21/32 for a M18 x 1.50mm tap. Tap the hole and use MBZ p/n 915013-013002 thread replacement adaptor.

$5 each from the dealer.
1983 300TD
1984 300D
1995 E300 (sold)
06-09-2017, 02:50 PM
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NZScott Offline
HX30W 73/44mm
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Posts: 306
Joined: Jul 2014
Location: New Zealand
#4
RE: Oil Cooler Repair
I had stripped threads on mine, took out the M18x1.5 fitting out of my spare engine's oil filter housing and got a workshop to tap and install it

Unfortunately it has a slight leak from the fins somewhere so I'm converting to AN10 now with a new cooler

1978 300D, 373,000km
OM617.912 with a Holset HX30W, 7.5mm IP, 711.113 5 speed (water injectio
n+W/A intercooler to come)
1977 250 270,000km (parts car)
1984 240TD>300TD (drivetrain swapped into '78) since sold
1988 Toyota Corona 2.0D 145,000km (DD while '78 has work done)


Dream build:
1984/85 W123, twincharged 617.952 - M90/112/122 feeding HE351VE or similar, 7.5mm 160cc IP, 716.6 6 speed, 3.27 LSD



(This post was last modified: 06-09-2017, 07:55 PM by NZScott.)
06-09-2017, 07:51 PM
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OM616 Offline
10mm MW
****


Posts: 528
Joined: Jul 2009
Location: Michigan
#5
RE: Oil Cooler Repair
(06-09-2017, 07:51 PM)NZScott Wrote: I had stripped threads on mine, took out the M18x1.5 fitting out of my spare engine's oil filter housing and got a workshop to tap and install it

Unfortunately it has a slight leak from the fins somewhere so I'm converting to AN10 now with a new cooler

I like that idea!  I am down to only one working car and didn't have an extra fitting, so I had to make one... Your idea saves having to make one!
06-10-2017, 11:56 AM
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