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#559682 13/02/19 11:29 PM
Joined: Jun 2014
Posts: 29
Just Getting Started
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Just Getting Started
Joined: Jun 2014
Posts: 29
Hi,

I have a 1995 Morgan 4/4 with an 1800cc silver top Zetec engine. I had a coolant hose leak recently and lost fluid which decided me to flush the system and put in new coolant. I would like to use an OAT coolant but have read somewhere that as a general rule OAT coolants are for 1996 and later cars. As a 1995 car obviously I am close to that 1996 date.

Has anyone any experience or advice on using OAT coolants on this age engine. Thanks for any help provided.


David

Joined: Aug 2015
Posts: 44
M
Just Getting Started
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Hi David,

I use a concentrated pink G12 Truck Coolant (1:1) in my 1996 1.8Zetec. G12 is upwards mixable with G12+ (yellow or pink/orange) G13 (purple) but NOT downwards with G11 (blue green).
Also look for your coolant to be FORD compliant.

There is a lot of fuss about coolants but as long as you do not mix up the green-blueish type with the pink-orange stuff (made for motors with aluminum parts) , you should have peace of mind.

Cheers,

Mich


4/4 1996 1.8 ZETEC Silvertop It has Swivel Pivots and an amazing Umbrella Holder!
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Just barreling along
Talk Morgan Guru
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Talk Morgan Guru
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Originally Posted By DurhamDavid
Hi,

I have a 1995 Morgan 4/4 with an 1800cc silver top Zetec engine. I had a coolant hose leak recently and lost fluid which decided me to flush the system and put in new coolant. I would like to use an OAT coolant but have read somewhere that as a general rule OAT coolants are for 1996 and later cars. As a 1995 car obviously I am close to that 1996 date.

Has anyone any experience or advice on using OAT coolants on this age engine. Thanks for any help provided.



David, as you car should still have a traditional brass/copper/soldered radiator I would not use OAT under any circumstances


Jon M
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I have used Prestone coolant in many engine types/ages. It mixes with any type so safe no matter what has been in there before.

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Talk Morgan Enthusiast
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The only supposed benefit from changing to OAT is that it has a longer interval between renewal so a bit less work.

However the 2 definitely do not mix and unless you are trying to increase your service intervals I wouldn't bother.

If you do swap make absolutely certain that you have flushed out ALL the blue stuff because sometimes it can be trapped in some of the galleries or the heater core for example and then you will get some crystals forming which can in the extreme clog up parts of the cooling system.

Also, Silicone hoses prefer the old Blue Ethylene Glycol.


Bob

2009 Black Roadster
1999 4/4 2 litre Zetec
IvorMog #559749 14/02/19 03:08 PM
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Scruffy Oik
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Originally Posted By IvorMog
The only supposed benefit from changing to OAT is that it has a longer interval between renewal so a bit less work.


Personally it all seems a bit counter-intuitive to me. Why would one make changes which act to reduce the opportunities to spend time in the garage with your loved one?


Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
Hamwich #559760 14/02/19 03:44 PM
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Talk Morgan Enthusiast
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Originally Posted By Hamwich
Originally Posted By IvorMog
The only supposed benefit from changing to OAT is that it has a longer interval between renewal so a bit less work.


Personally it all seems a bit counter-intuitive to me. Why would one make changes which act to reduce the opportunities to spend time in the garage with your loved one?


Totally agree thumbs


Bob

2009 Black Roadster
1999 4/4 2 litre Zetec
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Talk Morgan Guru
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As above Bob is correct on the hose damage issue

And don't forget OAT = organic ACID technology ! why would you want to introduce acid, however mild into an old cooling system ?


Jon M
CooperMan #559936 15/02/19 11:42 AM
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Originally Posted By CooperMan
As above Bob is correct on the hose damage issue

And don't forget OAT = organic ACID technology ! why would you want to introduce acid, however mild into an old cooling system ?


This thread made me check, and I discovered I'd put OAT in my '72. Spent much of last night flushing, and will do the same this evening!

I have an old Honda Goldwing (1978) - that requires a silicate free antifreeze as the silicate apparently destroys parts of the water pump seals.


1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10
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Some manufacturers put silicate in the OAT blend, supposed to protect alloys


Jon M
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