sandie115 Report post Posted August 13, 2020 I took my rig for an oil change, 2003 Newmar Mountainaire gas with GM Vortec engine. All went well except the mechanic showed me the brake fluid, said it though goopy, then stick his finger in and showed me it was thick and now very fluidly but clear. Said he had never seen anything like it. NOW, THE same place did a big brake job a year ago where my rear brake totally locked up so towed in and they fix it but nothing else done by any other place. I thought you NEVER put your fingers in the brake fluid etc and what would make it slightly thickened? The Brakes Work fine. Share this post Link to post Share on other sites
fly2low Report post Posted August 15, 2020 Brake fluid is hygroscopic (unless using a very special high boil point fluid, used in race cars). It is for this reason that most recommend flushing the fluid every 2-3 years. Share this post Link to post Share on other sites
rayin Report post Posted August 17, 2020 fly2low is right, most vehicle manufacturers recommend brake fluid be flushed and replaced in regular a maintenance schedule. Share this post Link to post Share on other sites
wildebill308 Report post Posted August 17, 2020 On 8/12/2020 at 7:18 PM, sandie115 said: I took my rig for an oil change, 2003 Newmar Mountainaire gas with GM Vortec engine. All went well except the mechanic showed me the brake fluid, said it though goopy, then stick his finger in and showed me it was thick and now very fluidly but clear. Said he had never seen anything like it. NOW, THE same place did a big brake job a year ago where my rear brake totally locked up so towed in and they fix it but nothing else done by any other place. I thought you NEVER put your fingers in the brake fluid etc and what would make it slightly thickened? The Brakes Work fine. The first thing I would do is contact Newmar and find out what the correct brake fluid is. Then I would do a complete drain/flush/refill with the correct fluid. Bill Share this post Link to post Share on other sites
manholt Report post Posted August 17, 2020 Bill, not Newmar. Chassis manufacturer! Share this post Link to post Share on other sites
wildebill308 Report post Posted August 17, 2020 True that would be anouther source of information but Newmar hase to know as they do service at the factory. Bill Share this post Link to post Share on other sites
rsbilledwards Report post Posted August 18, 2020 Do a complete flush, it should not be goopy. Putting you finger in it will have no effect on it. Use DOT 4, do not use synthetic. Yes should be a a regular service point especially if in moist climates. Share this post Link to post Share on other sites
rls7201 Report post Posted August 19, 2020 DOT 3, 4 & 5.1 are all synthetic and will work in your system. DOT 3 is out of date. DOT 4 is the standard. DOT 5.1 is sometimes difficult to find. As the numbers progress so does the boiling point temperature. DO NOT USE DOT 5. It is not compatible with the other brake fluids. Richard Share this post Link to post Share on other sites
