rogerowen Posted January 22, 2020 Report Share Posted January 22, 2020 Any reason to not use red/oat antifreeze in a TR engine? Quote Link to post Share on other sites
RobH Posted January 22, 2020 Report Share Posted January 22, 2020 Not advised by the FBHVC. To quote from their press release advice: " OAT was introduced in the mid-1990s and the products are biodegradable, recyclable and do not contain either silicates or phosphates and are designed to be longer lasting. However these products do seem to cause problems in older engines; over and above the ability of antifreeze to find the smallest crevice and leak, OAT antifreezes have been accused of destroying seals and gaskets and causing a great deal of damage in ‘old’ engines. For this reason the manufacturers do not recommend their use in historic vehicles." Quote Link to post Share on other sites
rogerowen Posted January 22, 2020 Author Report Share Posted January 22, 2020 1 hour ago, RobH said: Not advised by the FBHVC. To quote from their press release advice: " OAT was introduced in the mid-1990s and the products are biodegradable, recyclable and do not contain either silicates or phosphates and are designed to be longer lasting. However these products do seem to cause problems in older engines; over and above the ability of antifreeze to find the smallest crevice and leak, OAT antifreezes have been accused of destroying seals and gaskets and causing a great deal of damage in ‘old’ engines. For this reason the manufacturers do not recommend their use in historic vehicles." I had a feeling that was the case, thanks. Quote Link to post Share on other sites
iain Posted January 22, 2020 Report Share Posted January 22, 2020 This is a useful thread for ref. Quote Link to post Share on other sites
Drewmotty Posted January 22, 2020 Report Share Posted January 22, 2020 (edited) My steel figure of eight gaskets eaten by OAT antifreeze some years ago before I wised up. Edited January 22, 2020 by Drewmotty Quote Link to post Share on other sites
Motorsport Mickey Posted January 22, 2020 Report Share Posted January 22, 2020 Were those fitted with Wellseal ? Mick Richards Quote Link to post Share on other sites
iain Posted January 22, 2020 Report Share Posted January 22, 2020 Ouch! Quote Link to post Share on other sites
Drewmotty Posted January 22, 2020 Report Share Posted January 22, 2020 3 minutes ago, Motorsport Mickey said: Were those fitted with Wellseal ? Mick Richards I’ve used nothing else since I liberated a huge tin of life expired Welseal from an aircraft repair facility in the early 1980s.......and I’m still using it with a dash of acetone every now and again to thin it. Quote Link to post Share on other sites
Motorsport Mickey Posted January 22, 2020 Report Share Posted January 22, 2020 3 minutes ago, Drewmotty said: I’ve used nothing else since I liberated a huge tin of life expired Welseal from an aircraft repair facility in the early 1980s.......and I’m still using it with a dash of acetone every now and again to thin it. If that OAT antifreeze can do that to a Wellseal coated steelgasket I'm going to continue and go nowhere near it ! Thanks Andrew. Mick Richards Quote Link to post Share on other sites
Drewmotty Posted January 22, 2020 Report Share Posted January 22, 2020 I tend to be very sparing with sealant as I don’t like any excess circulating in the engine so the gaskets would have had the faces painted with a very thin coat when fitted and the thin gasket edges would have been left exposed to the coolant. I can only put the excessive corrosion down to the OAT antifreeze as I’ve stripped much older engines and not seen any evidence of figure of eight corrosion approaching this before or since. Quote Link to post Share on other sites
ChrisR-4A Posted January 22, 2020 Report Share Posted January 22, 2020 Available here if you need some, Quote Link to post Share on other sites
Drewmotty Posted January 22, 2020 Report Share Posted January 22, 2020 I get it here a bit cheaper: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F333277652390 Quote Link to post Share on other sites
RobH Posted January 22, 2020 Report Share Posted January 22, 2020 Fernox Alphi-11 is recommended by some. It has been discussed here before: https://www.tr-register.co.uk/forums/index.php?/topic/49908-antifreeze/ (post by Grease monkey about 2/3 down the page) https://fernox.com/wp-content/uploads/sites/3/2017/12/alphi_11_5l_v.002.pdf Quote Link to post Share on other sites
ctc77965o Posted January 23, 2020 Report Share Posted January 23, 2020 The issue with OAT is not that it is aggressive or damaging parts, but that it is formulated to protect only the certain metals used in modern engines.. that means that certain alloys featured in older engines are not protected...and then the water freely corrodes those unprotected alloys. Quote Link to post Share on other sites
Z320 Posted January 23, 2020 Report Share Posted January 23, 2020 Hi, I use (at Germany) "Glysantin G48", containing silicates, recommended to keep old engines sealed. Ciao Quote Link to post Share on other sites
mike ellis Posted January 23, 2020 Report Share Posted January 23, 2020 Glysantin G48 does contain silicates but it also contains organic acids making it sort of hybrid antifreeze. I would only use the Bluecol type, it is no big deal changing it every two years rather than the longer periods for OAT containing antifreezes. Mike Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 23, 2020 Report Share Posted January 23, 2020 (edited) My answer, same as above - Do Not Use OAT in your TR. It is said to create a slimy mess or crystals in the water ways, radiator and heater cores. See image from USA. Dex Cool is said to have been an OAT derivative. Cost GM a whole chunk of cash. https://www.bigclassaction.com/settlement/general-motors-dexcool-antifreeze.php another view http://www.sancarlosradiator.com/dex-cool.htm The Land Rover forum did this in 2015 https://landroverforums.com/forum/discovery-ii-18/substitute-coolant-havoline-toxic-72140/ Cheers Peter W Edited January 23, 2020 by BlueTR3A-5EKT Image added Quote Link to post Share on other sites
Z320 Posted January 23, 2020 Report Share Posted January 23, 2020 4 hours ago, mike ellis said: Glysantin G48 does contain silicates but it also contains organic acids making it sort of hybrid antifreeze. I would only use the Bluecol type, it is no big deal changing it every two years rather than the longer periods for OAT containing antifreezes. Mike no problem since 11 years Quote Link to post Share on other sites
RogerH Posted January 23, 2020 Report Share Posted January 23, 2020 16 hours ago, Drewmotty said: I tend to be very sparing with sealant as I don’t like any excess circulating in the engine so the gaskets would have had the faces painted with a very thin coat when fitted and the thin gasket edges would have been left exposed to the coolant. I can only put the excessive corrosion down to the OAT antifreeze as I’ve stripped much older engines and not seen any evidence of figure of eight corrosion approaching this before or since. Hi Andrew, don't be sparing with the Welseal. Once applied and a little air on the surface it will stay intact. The coolant will not wash it away. It serves as a very decent surface protector. When I fit my liners I tend to dribble more Welseal down into the base so that the F08's are Welcovered. Roger Quote Link to post Share on other sites
Ben Freer Posted January 23, 2020 Report Share Posted January 23, 2020 Use Evan's waterless coolant. Job done. I'll get my coat as I know there are many naysayers on here...... Quote Link to post Share on other sites
iain Posted January 23, 2020 Report Share Posted January 23, 2020 Brave man Ben! ( to mention the unmentionable....to some) Quote Link to post Share on other sites
Crawfie Posted January 24, 2020 Report Share Posted January 24, 2020 14 hours ago, Ben Freer said: Use Evan's waterless coolant. Job done. I'll get my coat as I know there are many naysayers on here...... We've spoken about this before !!!!! Quote Link to post Share on other sites
Lebro Posted January 24, 2020 Report Share Posted January 24, 2020 Quote Link to post Share on other sites
stillp Posted January 24, 2020 Report Share Posted January 24, 2020 16 hours ago, Ben Freer said: Use Evan's waterless coolant. Job done. I'll get my coat as I know there are many naysayers on here...... Nay. Quote Link to post Share on other sites
rogerowen Posted January 24, 2020 Author Report Share Posted January 24, 2020 Thanks everyone - think I'll stick with the Blue stuff! Quote Link to post Share on other sites
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