Drain coolant from engine block

Remove the top radiator hose and flush the system out with a normal hose. Next find the coolant drain plug on your engine block which often.

Remove the top radiator hose and flush the system out with a normal hose.

Drain coolant from engine block. After a short time the coolant will stop flowing which means the coolant is done draining. You should have between 1 12 and 2 gallons in the fluid bucket or catch basin. Be sure the radiator cap has been removed which will help you get most of the coolant out if the system.

Then tighten the drain plug or reinstall the lower radiator hose. Engine block drains allow you to drain coolant from the engine block the petcock on the radiator will only allow you to drain the radiator and lines - if that is all you have drained then you have left the job half done. Step 1 Place a drain pan under the petcock of the radiator located on the drivers side of the radiator at the bottom.

The major reason to drain engine coolant is to replace or refresh the coolant. The most important part of draining the engine coolant is capturing the waste coolant. Working in cramped engine spaces this can be tricky but you dont want this stuff going in the bilge or overboard.

Let the coolant drain into a pan. Draining the radiator alone should remove roughly 40 to 45 percent of the systems coolant. Next find the coolant drain plug on your engine block which often.

Install the radiator cap and run the engine for 10 minutes with the heater on maximum. Only run the engine outdoors or in a well-ventilated area. Turn off engine and allow radiator to cool.

Remove the large block plug above the oil filter on the driver side and the smaller one on the passenger side of the block. This will drain almost all coolant from the block. The entire system should hold 45 gallons.

Would be best to get 6 gallons of you want to flush it. This involves simply draining the coolant at the bottom of the radiator then topping up the radiator with fresh fluid until it its full. Its quick and easy and while it doesnt remove all of the old coolant from your system it is often all thats necessary to keep your cooling system healthy.

Engine Block Coolant drain locations. Jump to Latest Follow 1 - 2 of 2 Posts. Joined Jun 15 2008 15 Posts.

Discussion Starter 1 Dec 24 2011. Anybody have a pic of where the drains are. Stand under the engine look up at the SIDE of the block where Cyl 5 is you will find a brass plug.

It should fit an Allen socket 5 or 6mm. Use a socket not an Allen key and be careful not to strip the hole. There is a similar drain under Cylinder 1 position but you only need to drain just one.

Consult the vehicle owners manual for the location of the radiator petcock or drain and position the container on the ground under that drain so its ready to capture the escaping antifreeze. Open the drain and allow all the coolant to drain into the container until it stops flowing out. I do not find any coolant drain on the engine specified in the service manual.

The prescribed procedure simply states to open the rad cap 1 and then the rad drain 2 and let it drain. Flushing is done via the rad hoses as well so the closest thing to a drain would be the lower rad hose fitting. You can still flush your engine with a flush kit cut and spliced into the heater hose or just via radiator.

Honestly your not going to get the crud debris rust bits out of the coolant passages. Even with this plug out. The basic steps to flush a car engine block are.

Remove the lower radiator hose and catch the draining coolant in a bucket. Remove the top radiator hose and flush the system out with a normal hose. Continue until the water runs clear out of the bottom of the engine.

Set the temperature controls in the vehicle interior to full warm and the blower fan speed to Low. Slowly fill the expansion tank until the coolant coming out of the expansion tank bleeder screw is free of bubbles. Once the coolant is free of bubbles tighten the expansion tank bleeder screw.

Connecting a drain tube to the little outlet helps direct fluid into a bucket rather than letting it drip all over the place. MAKE SURE TO BURP your coolant system after replacing. DEAL OF THE DAY.

Cooling System Miscellaneous for BMW 5-Series E28 1982-1988. Coolant Temperature Switches Engine Block Drain Plugs.