(i made a thread similar to this over on bimmerfest, and it's been well received enough i'm posting it over here for more suggestions to add to it)
so i see a lot of griping about the suspension and cooling systems, among other things, and i'm putting together a list of reliability boosting mods out there.
here's all i have off the top of my head
-replace entire cooling system with aftermarket versions, electric fans and metal expansion tanks etc. Zionsville's kit with a metal impeller water pump and better thermostat costs $1,500, but various electric fan and aluminum radiator kits exist.
*along with this, get a lower pressure cap (like 1.4 or 1.2 bar, german auto solutions makes a good one) and switch to race coolant like evan's. this DOES NOT lower the pressure of the system, but it lowers the pressure ceiling so parts are stressed less during unusually warm circumstances, and gives the system an outlet for excess pressure.
-as bushings fail, replace with much longer lasting Powerflex equivalents (or any polyurethane brand). firms up the suspension too. full set would cost like $1400, but its better to replace as they fail or at the appropriate mileage.
-get one of those silver ribbon cables for the interior of the LCD screens, lasts far longer than the carbon cables and you'll probably never see missing pixels again. the cable costs like $15 and the teardown/assembly takes about an hour
-replace VCG, oil filter housing gasket, and oil pan gasket with newer gaskets made of VINTON rubber, which takes heat swings way better (up to 400 degrees, instead of 213) and is not attacked by synthetic oil. should last far longer than stock gaskets. also possibly Loc-tite gasket bolts so they dont try to back out and lose torque. Raj from besian systems did some tests on the newest (less than a year old) OEM bmw vcgs for both the m54 and m62 and confirmed they're ALL viton now from the factory.
-oil catch can to replace the very unreliable CCV system, although some have recently attempted a move to a traditional PCV valve instead, still waiting on long term reliability information on such a conversion
-upgrade to the newer timing chain tensioner design ASAP, it will give you much more time on the stock timing chain guides
*if you do need to do the guides, change out the timing chain cover gaskets to VITON as well
some other suggestions;
-Brass Caliper Bushings to replace the rubber ones
-stainless steel brake lines
-Install G.A.S DISA valve
-brass bleeder screw
-RTV sealant for vapor barriers on the doors
-aluminum thermostat housing
-CEL free thermostat mod, to make the valves open sooner http://www.bimmerfest.com/forums/sho...925&highlight=
so i see a lot of griping about the suspension and cooling systems, among other things, and i'm putting together a list of reliability boosting mods out there.
here's all i have off the top of my head
-replace entire cooling system with aftermarket versions, electric fans and metal expansion tanks etc. Zionsville's kit with a metal impeller water pump and better thermostat costs $1,500, but various electric fan and aluminum radiator kits exist.
*along with this, get a lower pressure cap (like 1.4 or 1.2 bar, german auto solutions makes a good one) and switch to race coolant like evan's. this DOES NOT lower the pressure of the system, but it lowers the pressure ceiling so parts are stressed less during unusually warm circumstances, and gives the system an outlet for excess pressure.
-as bushings fail, replace with much longer lasting Powerflex equivalents (or any polyurethane brand). firms up the suspension too. full set would cost like $1400, but its better to replace as they fail or at the appropriate mileage.
-get one of those silver ribbon cables for the interior of the LCD screens, lasts far longer than the carbon cables and you'll probably never see missing pixels again. the cable costs like $15 and the teardown/assembly takes about an hour
-replace VCG, oil filter housing gasket, and oil pan gasket with newer gaskets made of VINTON rubber, which takes heat swings way better (up to 400 degrees, instead of 213) and is not attacked by synthetic oil. should last far longer than stock gaskets. also possibly Loc-tite gasket bolts so they dont try to back out and lose torque. Raj from besian systems did some tests on the newest (less than a year old) OEM bmw vcgs for both the m54 and m62 and confirmed they're ALL viton now from the factory.
-oil catch can to replace the very unreliable CCV system, although some have recently attempted a move to a traditional PCV valve instead, still waiting on long term reliability information on such a conversion
-upgrade to the newer timing chain tensioner design ASAP, it will give you much more time on the stock timing chain guides
*if you do need to do the guides, change out the timing chain cover gaskets to VITON as well
some other suggestions;
-Brass Caliper Bushings to replace the rubber ones
-stainless steel brake lines
-Install G.A.S DISA valve
-brass bleeder screw
-RTV sealant for vapor barriers on the doors
-aluminum thermostat housing
-CEL free thermostat mod, to make the valves open sooner http://www.bimmerfest.com/forums/sho...925&highlight=
Reliability mods for e39? replace something once and hopefully never again
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