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#4812384 - 07/12/18 03:35 PM Cast iron block / aluminium head, what do you use?
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2446
Loc: 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.
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Comma X-Flow XS 10W-40.
1999 Peugeot 106 II 1.1 Max, On standby

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#4812396 - 07/12/18 03:46 PM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
emmett442 Offline


Registered: 12/07/16
Posts: 184
Loc: 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

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#4812399 - 07/12/18 03:48 PM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
tomcat27 Offline


Registered: 06/25/09
Posts: 3579
Loc: Chicago, IL
Green was good when everything was iron. I prefer hoat or oat on aluminum.
_________________________
2015 Rogue, 2014 Sentra, 2001 Camry, 2005 Starcraft, 1998 Dodge B1500
1996 Sebring Jx, 1984 F150, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300

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#4812402 - 07/12/18 03:51 PM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
Kestas Offline



Registered: 06/04/02
Posts: 12392
Loc: 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.

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#4812408 - 07/12/18 03:54 PM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
skyactiv Online   content


Registered: 03/02/13
Posts: 4488
Loc: 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

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#4812511 - 07/12/18 06:07 PM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
Johnny2Bad Offline


Registered: 05/20/13
Posts: 1884
Loc: 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]

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#4812871 - 07/13/18 04:26 AM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5269
Loc: 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.
_________________________
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#4812892 - 07/13/18 05:57 AM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
SR5 Offline


Registered: 07/07/15
Posts: 4516
Loc: 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

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#4813126 - 07/13/18 11:44 AM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
SargeBB Offline


Registered: 06/24/08
Posts: 167
Loc: 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.

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#4813185 - 07/13/18 01:21 PM Re: Cast iron block / aluminium head, what do you use? [Re: Kestas]
Warstud Offline


Registered: 09/02/05
Posts: 5494
Loc: 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.

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#4813675 - 07/14/18 04:56 AM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2446
Loc: 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.
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Comma X-Flow XS 10W-40.
1999 Peugeot 106 II 1.1 Max, On standby

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#4813867 - 07/14/18 12:02 PM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
Kestas Offline



Registered: 06/04/02
Posts: 12392
Loc: 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.

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#4814379 - 07/15/18 12:19 AM Re: Cast iron block / aluminium head, what do you use? [Re: FordCapriDriver]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2446
Loc: 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.
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Comma X-Flow XS 10W-40.
1999 Peugeot 106 II 1.1 Max, On standby

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