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Cast iron block / aluminium head, what do you use? #4812384
07/12/18 03:35 PM
07/12/18 03:35 PM
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
FordCapriDriver Offline OP
FordCapriDriver  Offline OP
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
Today my Escort had its timing belt, water pump and belt tensioner changed, i had been using an OAT Pink colour 30% premix coolant until now as it's what most of the people seem to be using on Escort forums.
They refilled it instead with a regular green IAT 30% premix coolant, considering dumping it all out and refilling with what i was using until now, what do you all who have engines with cast iron blocks and aluminium heads use? IAT or OAT, green or red/pink?
Is one or the other inherently better for an engine with an aluminium head?


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812396
07/12/18 03:46 PM
07/12/18 03:46 PM
Joined: Dec 2016
Posts: 189
Wisconsin
emmett442 Offline
emmett442  Offline
Joined: Dec 2016
Posts: 189
Wisconsin
I use OAT on EVERYTHING. Iron/Iron, Iron/Alum, Alum/Iron, Alum/Alum...doesn't matter. It all gets the same OAT.

No problems to report after 15 years.


2011 Ford Crown Victoria LX 4.6L V8 auto
2009 Chevrolet Malibu LT 2.4L I4 auto
1974 Dodge D200 360 V8 4 speed manual
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812399
07/12/18 03:48 PM
07/12/18 03:48 PM
Joined: Jun 2009
Posts: 3,694
Chicago, IL
tomcat27 Offline
tomcat27  Offline
Joined: Jun 2009
Posts: 3,694
Chicago, IL
Green was good when everything was iron. I prefer hoat or oat on aluminum.


2019 Cherokee, 2015 Rogue, 2014 Sentra, 2001 Camry, 2005 Starcraft, 1998 Dodge B1500
1996 Sebring Jx, 1984 F150, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812402
07/12/18 03:51 PM
07/12/18 03:51 PM
Joined: Jun 2002
Posts: 12,515
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,515
The Motor City
For your 1988 Escort, Ford indicates you should continue using the conventional green coolant. This was published in 2012.

There is more to consider that aluminum and cast iron. You also have to consider the gaskets used in the system, and if there is any copper, brass, or solder.

Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812408
07/12/18 03:54 PM
07/12/18 03:54 PM
Joined: Mar 2013
Posts: 4,756
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,756
The Midwest
Many VW engines still come with an iron block and an aluminum head like both cars in my signature. Using G40 coolant would be my choice.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812511
07/12/18 06:07 PM
07/12/18 06:07 PM
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
Johnny2Bad Offline
Johnny2Bad  Offline
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
I use what the OEM says to use. I don't trust "Universal" coolants. If I have to, I'll buy it from the dealer.

There was a video posted on the subject a while back. Maybe use the search facility (should do so anytime you want to create a new post anyway; 90% of the questions here are already answered).


'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812871
07/13/18 04:26 AM
07/13/18 04:26 AM
Joined: May 2012
Posts: 5,363
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,363
Fort Lauderdale, FL
Use a good heavy duty engine coolant for diesel trucks. Almost all are designed to protect multi metal systems, including brass, copper, and high/low lead solder.

Peak Final Charge is a good one you can find almost anywhere.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4812892
07/13/18 05:57 AM
07/13/18 05:57 AM
Joined: Jul 2015
Posts: 4,624
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,624
Down Under
I like G-05 HOAT in older cars. It's a hybrid coolant. IAT tech for fast action with OAT tech for long life.


Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4813126
07/13/18 11:44 AM
07/13/18 11:44 AM
Joined: Jun 2008
Posts: 170
Texas
SargeBB Offline
SargeBB  Offline
Joined: Jun 2008
Posts: 170
Texas
I do use the Green (Zerex) in our 2 vintage Mopar flathead 6's. Everything else, except the Super Duty diesel gets either Toyota Pink or Zerex Red or Pink. Ford, it seems cannot make up their mind on coolant as they've changed their recommendation again. Our diesel SD is a 2015. Just to protect the warranty, I use Motorcraft Orange in it...it's sort of like in the engine oil; I simply use the Motorcraft 15W-40 and let a Ford dealer change it. That way, no warranty headaches. I've said the above to tell you that if that were my Ford, I'd get rid of the green and do a full flush, then use the chemistry Ford calls for in that particular engine. Doesn't necessarily have to be the Motorcraft, but I'd certainly avoid any "Suitable for any car," coolants.

Re: Cast iron block / aluminium head, what do you use? [Re: Kestas] #4813185
07/13/18 01:21 PM
07/13/18 01:21 PM
Joined: Sep 2005
Posts: 5,664
MIchigan
Warstud Offline
Warstud  Offline
Joined: Sep 2005
Posts: 5,664
MIchigan
Originally Posted By: Kestas
For your 1988 Escort, Ford indicates you should continue using the conventional green coolant.


Yep....Plus there's no reason to dump the fluid that's suppose to be in there.

Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4813675
07/14/18 04:56 AM
07/14/18 04:56 AM
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
FordCapriDriver Offline OP
FordCapriDriver  Offline OP
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
I have this doubt because all the people in the forums tell me they use OAT Pink / Violet coolants,.

Zoom in on the engine pic in this page from a road test from 1986 : https://www.flickr.com/photos/triggersca...7-bmHLHG-btAZ52

This is a brand new car and it clearly has pink / red colour coolant in it not green.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4813867
07/14/18 12:02 PM
07/14/18 12:02 PM
Joined: Jun 2002
Posts: 12,515
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,515
The Motor City
Be careful with enthusiast forums. Many people post things because they feel they use special fluids instead of the mundane and pedestrian fluids the hoi polloi use, and they feel better for it. Some even reengineer their cars without thinking of the down sides. Many times good old regular green antifreeze is just fine, and may be less harmful to your vehicle than a HOAT or OAT fluid may be.

Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4814379
07/15/18 12:19 AM
07/15/18 12:19 AM
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
FordCapriDriver Offline OP
FordCapriDriver  Offline OP
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
Hmmm you're proably right about the forums, have hard some lousy advice on those in the past!


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4821223
07/23/18 11:02 AM
07/23/18 11:02 AM
Joined: Nov 2006
Posts: 19,900
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,900
MA, Mittelfranken.de
I use John Deere Cool-Guard II in everything. New, old, mix metal engines, aluminum core radiators, you name it. Its probably the best coolant/antifreeze I ever used, the nice part is the testing strips you can check it 5-6 yrs down the road and change it or add an additive package to it.

https://jdparts.deere.com/partsmkt/document/english/pmac/52394_fb_AntiFreezeCoolGard_II.htm


ASE L1, Master. Deutsch Meisterbrief.
Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver] #4822216
07/24/18 03:21 PM
07/24/18 03:21 PM
Joined: Jan 2004
Posts: 4,142
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,142
California
The Europeans have an aversion to phosphorus in their coolants - BASF did create G-05 and G-48 in the 1980s and I would stick to either.

Toyota's red LLC was also introduced in the 1980s, and back then most Toyo motors were iron block/aluminum head.

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