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#1
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Heater inlet pipe along the block...who has changed it?
The heater inlet pipe is the last of my complete cooling/heater overhaul...but while I had planned on doing it with my heater valves & aux water pump today...after looking at the location of the thing decided tackling a glass of scotch was far more enjoyable! Lol. For reference, under the 3.0 cooling pipes diagram it's listed as pipe 8. Here: RealOEM.com * BMW E53 X5 3.0i Cooling System Water Hoses
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2004 X5 3.0i
Mod list: Currently Longer than the maximum allowed characters that can be typed here... |
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#2
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Ive replaced it a few times. Each time due to it being blocked. Not a big deal. Clean work but a fair amount of time.
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#3
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Why do you want to replace it? Is it leaking, or is it preventative?
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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P. |
#4
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Quote:
@Doru: It's just a preventative measure. The pipe does have a double o-ring seal on the one end, and since everything else is new in the system I'm just being thorough. I'm also running the Stewart water pump and I really don't feel like taking any chances with old components. (Yes, the rad is on the list for spring)
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2004 X5 3.0i
Mod list: Currently Longer than the maximum allowed characters that can be typed here... |
#5
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I pulled the intake off on my 530 to change it. Just as well because there were rotten vacuum lines in the back of the intake that are hard to see/get to anyway.
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2012 X5 35 2004 AMG C32 02 X5 4.4 Sport Pkg - Sold 01 740i MSport - Sold |
#6
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My e39 has the same engine as yours, I also have the Stewart WP. I did a cooling overhaul, but I haven't changed that solid (plastic) pipe. My understanding is that that particular pipe isn't as much prone to cracking as the rubber hoses. The only time I would change that pipe is if the O-rings would start to leak - to pry it out you need to force it a bit, and that might induce additional (unseen) stress to a cyclical cold-hot submitted plastic part. My engine is also older than your M54, and with the Stewart WP I could observe a decrease of max KTMP of 2-3°C. Also, in hot days, under heavy traffic conditions (heavy stop-and-go with idling), the KTMP never went above 96°C, whereas with the OEM WP, I could see some 98°C and higher KTMP quite frequently. This makes me believe that the Stewart WP will make last the plastic components much longer.
As I said, I would monitor the area where the pipe plugs in the bottom of the engine block for dripping, and I would change it only then (busted O-rings).
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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P. |
#7
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Thanks for the input! I would also put my money on the O-rings leaking before the pipe itself failed. I actually have the pipe on-hand as I ordered it with my heater valves and Aux WP....it's just the time to put the darn thing in im short on! Like I stated before it's merely a preventative measure as it's currently NOT leaking/seeping....I've done everything else at this point, and would just feel better if I could cross this one off the list as well.
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2004 X5 3.0i
Mod list: Currently Longer than the maximum allowed characters that can be typed here... |
#8
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My 2006 X5 M54 with 125K is doing fine, no leak from the heater plastic pipe.
the E39 M54 cars are getting older (compared with E53), and a few people report either the O-rings leak or the plastic pipe cracks a bit, leaking coolant, nothing catastrophic but slow leak. My question is: those with E53 M54 engine with plastic pipe leak... 1. When did it happen (year/mileage)? 2. What is the mode of failure: leaking O-rings vs cracked plastic? I am trying to figure out WHEN to do my preventive maintenance. Thanks!
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1998 E39 528i 5sp MT 2006 E53 X5 3.0 6sp MT |
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