Thermostat Gasket/o-ring? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-02-2004, 01:03 PM
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Hey I recently bought a thermostat but I'm not sure if I have the gasket or not for the thermostat housing. I also bought the metal thermostat housing but I think I might have not recieved the gasket....unless the gasket is the weird shaped rubber insert?? Also does the thermostat need two o-rings? I only ordered one! used
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#2 (permalink) Old 10-02-2004, 01:07 PM
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Yes... that gasket is a weird shape.... it is like that for the hole that goes into your block... in then the thermo... then the out port... I'm pretty sure that gasket is for the out port.. but it will be very obvious when you pull that sucker off... it fits.. trust me... good idea though.. is to get some silicon sealant... or liquid gasket... and put that around the flat metel surfaces.... if you go to "PelicanParts.com"... work through the web site.. there are a lot of DIY write ups that have pics and help out a lot... Good Luck

Les


1997 E36 M3 1990 E30 325i
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#3 (permalink) Old 10-02-2004, 01:37 PM
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As for the O-rings, I only need the one o-ring for the thermostat right?
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#4 (permalink) Old 10-02-2004, 01:44 PM
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Yes... the o-ring is the for the thermostat... and the weird one for the housing... make sure you put a little coolant on that o-ring... its said that helps keeping that thing sealed and moisturized.....

Good Luck

Les


1997 E36 M3 1990 E30 325i
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#5 (permalink) Old 10-02-2004, 02:17 PM
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Thanks for the tips, I have everything except for the thermostat. I ordered a lower temp one that opens at 75C instead of the 88C stock. Looks like I'll have to wait until next weekend to install everything. How did you think the difficulty was when you installed your water pump and thermo?
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#6 (permalink) Old 10-02-2004, 02:30 PM
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Its really not that hard.. unless you dont have the fan tool.... keeps the pulley from turning while you unbolt the fan.... other than that... drain the system... pull the fan.. pull the shroud... which involves un-doing all of the coolant lines... one goes to the rear left of the engine... another is at the top left of the radiator... and I think one more.. just follow them... all left and right calls.. are as if you were looking forward... then take the belt off... take the pulley off... unbolt the water pump... bang on it.. to brake the seal... pull it out... then if your replacing your thermostat and housing.. take both sides of the coolant tubes off of your thermostat housing... you have to take the engine hook mount off first then unbolt the thermo housing... bang a little cause it might be tight... then pull that sucker off.... pull the thermostat out... usually takes a screw driver... pry it out... then put the new one in.. with the o-ring... put some coolant on the o-ring.. push it in.. make sure it is lined up the right way... should have an arrow pointing up... then put the new housing on.. with the weird gasket.. and put some sealant/gasket liquid around the edges and flat spots... put it on... and bolt it down.. then re-install the tubes... left and right of the housing... then put the o-ring on the water pump... also put some fresh coolant on the ring... then bolt it up.. put the pulley back on... thats four bolts... then replace the shourd with all the hoses... then work the fan in and hand screw in the nut for the fan... hold that pulley still with the tool.. or a screw driver inserted between two screws... its hard.. but possible... replace the coolant.. and your done...

Note:.. it takes a few runs of the engine and the fans on with full heat to circulate that coolant... your "check coolant level" warning will stay on for a day or two... drive the car... let it cool.. check the level.. and fill.. do that a few times till it stays full.... its not leaking.. it just takes time to get the coolant in the entire engine.

Good Luck

Les


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