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DISCUSSION => Engine + Driveline => Topic started by: Marcp on April 10, 2008, 02:52:35 PM

Title: Bad waterleak from front of engine, and PAS belt
Post by: Marcp on April 10, 2008, 02:52:35 PM

I have a really bad water leak coming from the front of the engine, I guess this is the water pump?   Its lower down the engine, past the thermostat.

Also, how do I go about adjusting the PAS pump belt?   Mines loose as hell, as in almost falling off.   No idea where it adjusts.

Thanks

Title: Bad waterleak from front of engine, and PAS belt
Post by: nomad on April 10, 2008, 03:56:34 PM

You must adjust the alternator bracket to tighten the Water Pump belt.
You must adjust the Power Steering Bracket to tighten the PS belt and you must adjust the A/C tension wheel to tighten the A/C belt.

Yes, underneath the thermostat housing is the Water Pump. The fan is attached to it (remember the fan is reverse threaded.)

Title: Bad waterleak from front of engine, and PAS belt
Post by: hoevesruperd on April 10, 2008, 04:45:28 PM

Quote from: nomad;46696

Yes, underneath the thermostat housing is the Water Pump. The fan is attached to it (remember the fan is reverse threaded.)

i remember the thermostat being under the thermostat housing... and the water pump holding on behind the pulley.. no? could your leak be from the famous profile gasket?  (http://www.mesaperformance.com/faqs/318tcpg.html) ?

Title: Bad waterleak from front of engine, and PAS belt
Post by: Frank Gallegos on April 10, 2008, 06:47:35 PM

There is a site that may help you out with what it is you are asking.  Best of luck!

Frank

http://zoso.no-ip.org/318i-belts.html

Title: Bad waterleak from front of engine, and PAS belt
Post by: nomad on April 10, 2008, 10:45:19 PM

Ha ha, I wrote that funny.
UNDERNEATH the thermostat housing is the thermostat. LOWER THAN the thermostat housing is the waterpump holding the fan. ;)

Quote from: hoevesruperd;46699

i remember the thermostat being under the thermostat housing... and the water pump holding on behind the pulley.. no? could your leak be from the famous profile gasket?  (http://www.mesaperformance.com/faqs/318tcpg.html) ?

Title: Bad waterleak from front of engine, and PAS belt
Post by: nicknikolovski on April 11, 2008, 04:33:57 AM

The thermostat is in the thermostat housing. The water pump has a pulley attached to it for the belt and then the fan clutch & blade assembly in front of the pulley.

The water pump would most likely leak down onto the crankshaft pulley and/or the power steering belt.

The profile gasket is hidden behind the timing covers and the cylinder head will have to come off.

Could you maybe post a picture of the leak.

Title: Bad waterleak from front of engine, and PAS belt
Post by: Marcp on April 11, 2008, 01:24:20 PM

I can get a picture tomorrow, but like your saying the leak is going down onto the powersteering pump and onto the belt, then onto the little tray underneath.

Thanks for the linkl with the belts!!

Title: Bad waterleak from front of engine, and PAS belt
Post by: nomad on April 11, 2008, 04:03:54 PM

Bad profile gasket would leak coolant directly into the oil where the timing chain is.
Water pump leak, or even thermostat gasket leak, would run down the outside (if all gaskets on timing covers are good) of the front of the engine.

It's probably the WP as it has a "weep hole" right? Most cars do, not positive on the M42. Basically if the WP starts to fail coolant will "weep" out of the WP

Title: Bad waterleak from front of engine, and PAS belt
Post by: nicknikolovski on April 11, 2008, 08:35:14 PM

thats pretty much right nomad.