1993-1998 Bmw 3 series Radiator installation
This installation will vary slightly with vehicle equipment with an automatic transmission. These steps are used as a guideline and do not have to be followed exactly in the order proposed. Clink on the pictures for a larger high quality picture.
Step 1. While waiting for the vehicle to cool, you can start by removing the
radiator cover screws (Phillips head screw driver).
Step 2. Once you have removed the Radiator cover locate the radiator mount.
These mounts are unique and only used for BMW radiators. Begin by placing a
flat head screw driver in the slot (there is an arrow indicating where to place
the screw driver). Then press the screw driver down, and pry it towards you,
away from the car. And the mount will simply pop right out. Be careful because
the radiator comes loose at this point.
Step 3. Let’s start to disconnect a few hoses/clamps. 1. Shows the radiator
support clip removed. 2. Not a hose clamp, but we used a flat head screw driver
to pry it open and replaced this clamp with a better hose clamp. 3. A basic
hose clamp for the radiator to water pumps hose. Do no pull the hose off unless
you have flushed the radiator.
Step 4. 1. Disconnect the harness for the radiator temp sensor. 2. Shows the
radiator temp sensor, do NOT disconnect at this time. 3. shows the radiator
fluid sensor, do NOT disconnect at this time
Step 5. Its time to flush the radiator of its fluid. Be sure that the car is
cool because the coolant will be hot and could burn you. Locate the radiator
drain plug underneath the car. You must jack up at least one side of the car
in order to do this.
A drain bucket is nice, try not to miss.
Step 6. Once the coolant has completely drained from the hoses/radiator and
water pump you can start disconnecting the hoses and pull the radiator from
its resting place.
Step 7. Now its time to disconnect the radiator reservoir and fan is you feel
the need to (we did remove the fan in order to make it easier to remove the
radiator. Remove the radiator reservoir cap (1), and push the two tabs towards
each other and press down on the tabs. Finally, pry the piece up (make sure
the cap is removed)
In order to lock the water pump, we placed a large flat head screwdriver between the water pump pull and the water pump hosing, the screw driver get lodged between two of the mounting bolts.
The following pictures don’t do a very good job demonstrating how to lock the water pump pulley, but it is difficult to pic. The screwdriver handle locks against the oil filter housing, but the shaft of the driver needs to be locked between two of the water pump bolts.
Step 8. Once you have removed the faulty radiator remove the temp. Sensor,
any hoses that are left and the fan shroud. The top picture demonstrates where
the only two mounting pins are on the shroud. In the bottom right picture, the
pin must be pried upward then you must push the flathead screwdriver underneath
the housing for the pin to pull the housing out as well. We removed the small
hose located on the top section of the radiator after we removed the radiator
Don’t forget to reinstall the temp sensor, and small hose. If you have an automatic transmission you will have to reconnect the transmission coolant lines once the radiator is reinstalled. The small hose should be installed exactly how it is picture (while facing the car). Reinstallation of the new radiator is pretty much a complete reverse, remember to tighten all hose clamps and check for leaks.
Remember to bleed the coolant once everything is back together.
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