# 65 mustang rust in motor **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [May 29, 2019, 3:05am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185 "2019-05-29T03:05:39Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Tanerphillips10\_149221](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@Tanerphillips10\_149221](https://community.cartalk.com/u/Tanerphillips10_149221)\ **Post date:** [May 29, 2019, 3:05am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/1 "2019-05-29T03:05:39Z")
I have a 1965 mustang with a 74 302 motor it’s very rusty in the radiator (brand new less than 2 months old) already stopped up with rust what can I poor in it to sorta cut the rust to remove it I’ve took thermostat out and ran gallons of water in the top hose and let it run out I’ve tried 4-5 Preston’s flush kits 2 blue devil kits I’ve tried CLR and evaporust and they all came out rusty but still got more I’ve even filled block and radiator up 10-15 time ran it 10-15 to get warm and it still not come clean any help is appreciated ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [May 29, 2019, 3:21am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/2 "2019-05-29T03:21:51Z")
I think you’ve proved there’s a lot of rust inside the engine. You’ll just have to keep doing what you’ve been doing. Drain , refill, run engine, etc etc. Eventually all the rusty sediment will be gone and hopefully there’ll still be enough engine metal left to keep it running. You have a 65 Mustang in your possession, so things can’t be all bad 😉 You might want to eliminate the heater as a rust source by bypassing it for this exercise. I think Ray said on the show their shop uses a product containing oxalic acid for this purpose. ---
**Author:** ![Honda-Blackbird](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/honda-blackbird/32/3159_2.png) [@Honda-Blackbird](https://community.cartalk.com/u/Honda-Blackbird)\ **Post date:** [May 29, 2019, 1:17pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/3 "2019-05-29T13:17:02Z")
You can remove the water pump and other hoses and fill the engine with Muratic acid…rinse and repeat till all the rust is gone. Its messy but it will do the trick. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [May 29, 2019, 1:48pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/4 "2019-05-29T13:48:58Z")
Any chance you’re up for an engine rebuild? Sounds like that block has seen better days. ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [May 29, 2019, 2:19pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/5 "2019-05-29T14:19:59Z")
Installing a coolant filter in the heater hose might eventually clear up the coolant [http://www.wixfilters.com/Products.aspx?ct=phcf](http://www.wixfilters.com/Products.aspx?ct=phcf) and there are plenty of easily adaptable filter mounts available [https://www.oreillyauto.com/shop/b/performance-16477/engine-16841/filters-16562/oil-filter-relocation-kit-19457/3f522aabaafe](https://www.oreillyauto.com/shop/b/performance-16477/engine-16841/filters-16562/oil-filter-relocation-kit-19457/3f522aabaafe) I have a few of those adapters laying around from long ago when they cost less than $5. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [May 29, 2019, 4:09pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/6 "2019-05-29T16:09:35Z")
I’d probably try something like this first. Least amount of effort and if it works, great! ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [May 29, 2019, 8:08pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/7 "2019-05-29T20:08:54Z")
If you try that stuff please post your results @Tanerphillips10_149221. It does sound promising. ---
**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\ **Post date:** [May 30, 2019, 4:15am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/8 "2019-05-30T04:15:23Z")
I think Rod’s spamming. Trying to sell his old lot of adapters. I kid, I kid! ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [May 30, 2019, 11:44am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/9 "2019-05-30T11:44:04Z")
Carolyn wouldn’t like that @Scrapyard_John. And we don’t want to make Carolyn mad do we. ---
**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\ **Post date:** [May 30, 2019, 10:10pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/10 "2019-05-30T22:10:24Z")
Sorry. False alarm! ---
**Author:** ![Tanerphillips10\_149221](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@Tanerphillips10\_149221](https://community.cartalk.com/u/Tanerphillips10_149221)\ **Post date:** [May 30, 2019, 10:56pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/11 "2019-05-30T22:56:33Z")
Where is a good cheap place to buy some and is it safe for gaskets ---
**Author:** ![Tanerphillips10\_149221](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@Tanerphillips10\_149221](https://community.cartalk.com/u/Tanerphillips10_149221)\ **Post date:** [May 30, 2019, 10:57pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/12 "2019-05-30T22:57:50Z")
I poured some into the car yesterday I’m gonna let it set for about 5-7 days starting it and drive it all I can and will keep you updated on how it is ---
**Author:** ![Tanerphillips10\_149221](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@Tanerphillips10\_149221](https://community.cartalk.com/u/Tanerphillips10_149221)\ **Post date:** [May 30, 2019, 10:58pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/13 "2019-05-30T22:58:30Z")
Thank you I bought some and I will give it a try ---
**Author:** ![Honda-Blackbird](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/honda-blackbird/32/3159_2.png) [@Honda-Blackbird](https://community.cartalk.com/u/Honda-Blackbird)\ **Post date:** [May 30, 2019, 11:00pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/14 "2019-05-30T23:00:54Z")
I’m curious to know if said product has Muratic acid in its ingredient list. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [May 30, 2019, 11:32pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/15 "2019-05-30T23:32:44Z")
I’d take the vehicle to someone who has a cooling system flush machine. ![COOLANT%20FLUSH%20MACHINE](https://global.discourse-cdn.com/cartalk/original/3X/0/2/020d5064206f1bc49741c812f50e6cea13218b16.jpeg) That’s the only way you’ll get all the rust out. Tester ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [May 31, 2019, 2:36am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/16 "2019-05-31T02:36:35Z")
The label says DRAIN & FILL and I wouldn’t expect it to do more @Tester. Have you operated one? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [May 31, 2019, 2:49am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/17 "2019-05-31T02:49:31Z")
The image is my coolant flush machine. The problem is, you put the chemical in, run the vehicle and the corrosion contaminates the entire cooling system. Then you shut the engine off, the water pump stops pumping, and the coolant stalls and all the contaminates settle out of the coolant in the radiator, engine block, heater core, hoses, etc… You drain the radiator and all looks good. You fill the system with new coolant, drive the vehicle, and all the settled contaminates still in the engine block, heater core, hoses. etc…, returns. Tester ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [May 31, 2019, 2:01pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/18 "2019-05-31T14:01:35Z")
Back in the GOOD OLE DAYS when a cars cooling system became plugged the radiator was removed and rodded out and before reinstalling it the thermostat was removed and water with shop air to boost it was run from the top to back flush the engine. The results were outstanding. Of course these days imported aluminum radiators cost less than the cost of rodding and the entire cooling system maintenance situation has changed. And a significant reason for your machine is it enables a full service shop to offer a reasonably good job of cleaning the cooling system without flooding the floor. But as for the OP, I can’t imagine how repeated back flushing with a garden hose didn’t significantly improve the situation. And like all snake oils I always watch and wait for others to prove how effective and safe they are before I stick my neck out. If the cooling system is dumped and given a DIY Prestone heater hose back flush every 3 years, and barring some other problem like a transmission cooler failure, I can’t imagine ever having a problem with rust or the usual scale that accumulates in the hot side tank on a radiator and the lower flues. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [May 31, 2019, 5:53pm UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/19 "2019-05-31T17:53:56Z")
> [@Tester](#): > > contaminates settle out of the coolant in the radiator, engine block, heater core, hoses, etc You might want to read the about the product more carefully. It works through a process called chelation. The bonded metals are held in suspension. Chelation is a well known and understood chemical process also used in medicine to remove toxins from the body. ---
**Author:** ![Tanerphillips10\_149221](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@Tanerphillips10\_149221](https://community.cartalk.com/u/Tanerphillips10_149221)\ **Post date:** [June 20, 2019, 2:38am UTC](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185/20 "2019-06-20T02:38:15Z")
I ran some through for about a week and drained it It seemed to do the trick very recommended if there’s tons of rust. Light rust I’d use cheaper [Next page](https://community.cartalk.com/t/65-mustang-rust-in-motor/141185.md?page=2)