The GM orange antifreeze eats away at the hoses causing that oily sludge, first thing I would do is have the cooling system flushed, that sludge will clog up the waterpump ports and tubes in the radiator..could cause motor failer
Are you sure its oil in the antifreeze? oil is brown. your van should have dexcool wich is orange, not green.(looks red sometimes)check the coolant again and check the oil. if it looks milky or foamy, there is coolant in it. sounds like it may be a blown head gasket. not good. stop driving it if you want to save your engine. you need to replace the head gasket/s, and flush the cooling system.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
most likely not. unless your coolant system was nasty dirty gunked up. more likely, that steam coming out of the radiator is also in the upper part of your engine super heating it, expanding stuff too, too much. when it contracts, gaps open up that shouldn't. my guess is a head gasket or intake manifold gasket
Could be three things: Hopefully the first...
1. radiator fan not blowing. (most likely)
2. Radiator clogged (not likely)
3. Head gasket blown... (very possible)
If #1, system cannot detect fan not blowing. It may be the fuse or the relay switch, disconnecetd wire at fan, or burned-out fan motor.
If #2, Flush radiator
If #3, you will see WHITE smoke out the tailpipe and excessive water drops.
Your new oil will have a "milky" look (check the oil dipstick). That is water.
When engine is COLD, remove radiator cap and start car. You will notice high-pressure "bubbles" squirt out of the radiator, even before the engine warms up.
The rust is probably in the engine. There are many little pockets, water ways, water jackets (around the cylinders), etc, so getting all the rust out without dunking the block and heads in a cleaning tank is about imposible. I would recommend giving it really good flush every 4 to 6 months. I would try flushing the radiator before replacing it because it is probably not rusted, even though it is full of gunk.