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-   -   Heater Hoses maintenance at 150K (https://www.bimmerfest.com/forums/showthread.php?t=840806)

cn90 04-28-2015 08:14 PM

Heater Hoses maintenance at 150K
 
2 Attachment(s)
Hi guys,

Just wondering what you guys think re Heater Hoses maintenance at 150K. Having owned many cars over the years, I understand that the heater hoses are unreliable after some 17y/150K miles.

In May 2006, at 90K, I overhauled the cooling system (rad, 2 rad hoses, WP, fan clutch, reservoir, belts, tensioners etc.). I did NOT touch the heater hoses.

There are about 7 hoses I want to replace (at the rear of engine, at heater valves, throttle body and the long hose from reservoir). The cost is about $100 or so. But I wonder what you guys think...


https://www.bimmerfest.com/forums/att...hmentid=506563


https://www.bimmerfest.com/forums/att...hmentid=506564

edjack 04-28-2015 08:55 PM

Sounds like a good idea. I did mine just recently at 148k. Weren't hard, but one less thing about which to worry.

TheHockeytowner 04-28-2015 09:53 PM

214k here, I've never touched them. Winter is effectively over in MI, so if they're waiting to break, now is as good a time as any.

Zerodynamic 04-29-2015 12:12 AM

Quote:

Originally Posted by edjack (Post 9051188)
Sounds like a good idea. I did mine just recently at 148k. Weren't hard, but one less thing about which to worry.

What condition were your hoses in?

nedmon 04-29-2015 04:56 AM

Just do it. I replaced mine last year and found one weeping pinhole. I didn't replace that plastic pipe part 5 and am now wondering if I should at 180k miles

cn90 04-29-2015 05:29 AM

Quote:

Originally Posted by nedmon (Post 9051651)
Just do it. I replaced mine last year and found one weeping pinhole. I didn't replace that plastic pipe part 5 and am now wondering if I should at 180k miles

For 1996-1998 M52 engines, I think #5 is metal.
Later years: plastic.

Max_VQ 04-29-2015 09:36 AM

2001 530 with 271,000 miles and I have no plans to replace them. With the milage on the car, I don't replace any more parts that "might" fail.

Chisum 04-29-2015 10:11 AM

Mine are weaping now at 132K it's on my list of things to replace.

Chisum

TheHockeytowner 04-29-2015 10:46 AM

Quote:

Originally Posted by Max_VQ (Post 9052135)
2001 530 with 271,000 miles and I have no plans to replace them. With the milage on the car, I don't replace any more parts that "might" fail.

Amen!

bluebee 04-29-2015 12:02 PM

This is great information for the heater-hose thread, so I'll cross reference.
- How to locate all the cooling system hoses in the BMW E39 (1)
https://www.bimmerfest.com/forums/att...8&d=1423691463
I think, at this point in the E39 life, that all the rubber is likely due for replacement.
- What is the recommended parts list for a complete cooling system overhaul (1)

What we need is a comprehensive list of all the hoses, if that doesn't already exist in the two combined threads above...

See also:
- What is the recommended parts list for a complete cooling system overhaul (1) quickie telephone verbal instructions for unlocking the high instrument cluster on the E39 to test the koolant KTMP (1) & how to tell whether you have the high or low on board computer cluster (1) & a video showing how to unlock the low OBC (1) or the high OBC cluster for diagnostics (1) & how to change the OBC MID IHKA KTMP temperature from degrees Celcius to Fahrenheit (1) & how to locate all the cooling system hoses in the BMW E39 (1) & how to non-destructively remove the heater hoses (1) or radiator nipple (1) or expansion tank nipple (1) or overflow hose Oetiker clamp (1) & how not to misplace the thermostat wiring loom (1) & how not to twist a plastic bleeder screw (1) & the cn90 trick to get the fan clutch nut back on (1) & bluebee tricks to get the radiator back on in the I6 automatic (1) & the teklord69 trick to cutting the fan shroud so that the viscous van clutch nut can be removed easily (1) & what is the proper coolant level bobber stick height (1) & what to do when your expansion tank coolant level sensor float measuring stick is MIA missing in action (1) & a mechanical fan clutch delete to switch to an electrical fan (1) & where to find leaks when the CHECK COOLANT LEVEL is lit on the instrument cluster (1) & a pictorial saga of all the ways the cooling system can fail (1) & how to diagnose lack of HVAC/IHKA heater core heat with cooling system (auxiliary pump) at idle (1) & where the coolant level sensor cable goes (1) & what is the o-ring size for the coolant temperature aux fan thermoswitch (1) & how the thermostat works, including what the normal temperature of the coolant is when the thermostat opens under normal conditions (1) & how to remove just the expansion tank to repair a leak during your cooling system overhaul (1) & how the expansion tank works (1) & users' behr/hella cooling system autopsy photos (1) & what to check on your new Behr/Hella expansion tanks to ensure it's not DOA (1) & how to test the cooling system auxiliary electrical fan (1) & a how to replace the aux fan (1) & where is the auxiliary fan fuse F75 (1) & where is the aux fan relay (1) & how to make your own BMW special cooling & belt drive system counterhold tools (1) & how to retrofit brass bleeder screws (1) & how to modify the cooling system expansion tank 2 bar cap to 1.2 bar to vent at a lower pressure (1) & how to modify the cooling system pressure with zero psi coolant (1) & how to eliminate weak recycled plastic with Zionsville aluminum (1) & how not to (JB Weld) fix a cracked radiator or other cooling system overhaul leaks (1) & how to tell the age of your cooling system by its date date codes, stickers, and plastic molded markings (1) & how to retrofit a coolant level sensor to an E39 that doesn't have it (1) & how to test the cooling system auxiliary electrical fan (1) (2) & a DIY for how to replace the aux fan (1) (2) (3) & where is the infamous auxilliary fan Fuse F75 (1) & where is the auxiliary fan relay (1) & summary advice to provide users who suspect a major engine repair due to overheating (1) & how to test an overheated engine for a blown head gasket, cracked heads, a warped block, stripped head bolt threads, cam seizures, contaminated bearings, coolant hydrolock, or piston, ring, or valve damage (1) & what are the major factors in deciding whether to rebuild the engine, replace the engine, or sell the car (1) & a DIY for replacing the I6 M54 head gasket (1) & a DIY for replacing the V8 M62TU head gasket (1) & why these engines are so prone to heat-related damage in the first place (1) & welding the crack between cylinder #3 and the water jacket on the exhaust side (1) & what engine swaps are most recommended (1) & where to obtain a new or rebuilt head (1) or a replacement short block or long block (1) & how to lift & remove the engine (1) & how long can you drive your BMW E39 with the viscous fan clutch removed (1) & what is the most often recommended coolant (1) & tricks for efficient flushing (1) draining (1) bleeding (1) and coolant refilling DIYs (1)

lesguy 04-29-2015 12:53 PM

Quote:

Originally Posted by Max_VQ (Post 9052135)
2001 530 with 271,000 miles and I have no plans to replace them. With the milage on the car, I don't replace any more parts that "might" fail.

Agreed. Im not sure Ive actually ever had one of those hoses fail on me..ever. Perhaps Ive just been fortunate.

cn90 04-29-2015 01:16 PM

I normally don't replace parts that "might" fail.
However, cooling system is the exception, when you lose coolant, the engine may go with it (blown head gasket), so when it comes to cooling system, I try to be "proactive".

nedmon 04-29-2015 03:07 PM

Thanks CN90 re that Part 5 heater pipe maybe being metal, not plastic. I will give it the scratch test to find out what it is.

poolman 04-29-2015 03:18 PM

Probably need to do mine, pushing 310,000 on the car now

Agimat 07-13-2015 09:25 AM

I just found out today that one of these hoses (4,5 and 8) need to be replaced so I'm having my indy replace them all. For months, the car had rough idle during cold start, and had a cooling system overhaul over the last 6 months (meaning pretty much all components have been replaced after two overheats). The leaks in these hoses were undetected until it got big enough to have coolant leaking under the water pump. It is a 16-year old car and nothing was replaced under the intake manifold as shown by the car's service record in the last 5 years. Since this will be opened up during the hose R&R, what other things should I ask my indy to have replaced?

Agimat 07-13-2015 09:33 AM

1 Attachment(s)
Here is the attachment I forgot for my post above:

WaveSurfin3100 07-13-2015 10:22 AM

If you have the funds, replace the knock sensors and hoses the from the heater control valve that run to the firewall...Any other vacuum hoses and rubber caps under and behind the Intake Manifold. Lately I've seen more and more starter issues, so maybe replacing the starter wouldn't be a bad idea!?

Wgosma 07-13-2015 11:06 AM

Quote:

Originally Posted by TheHockeytowner (Post 9051293)
214k here, I've never touched them. Winter is effectively over in MI, so if they're waiting to break, now is as good a time as any.

199K here, same status as your car. Original hoses.

Bill

194449 07-13-2015 01:42 PM

Quote:

Originally Posted by Agimat (Post 9180304)
I just found out today that one of these hoses (4,5 and 8) need to be replaced so I'm having my indy replace them all. For months, the car had rough idle during cold start, and had a cooling system overhaul over the last 6 months (meaning pretty much all components have been replaced after two overheats). The leaks in these hoses were undetected until it got big enough to have coolant leaking under the water pump. It is a 16-year old car and nothing was replaced under the intake manifold as shown by the car's service record in the last 5 years. Since this will be opened up during the hose R&R, what other things should I ask my indy to have replaced?

Knock sensors
Dual-temp sensor between cyls 5 & 6

Like the two fiberglass heater pipes, these are virtually impossible to reach, let alone replace unless the intake manifold is off. I don't read much about anyone having trouble with the knock sensors, but the cheap dual-temp sensor has been known to go bad.

When you have the manifold off, it's also much easier to replace the entire CCV system, or the starter if it's a suspect, but these are things that many people still manage to replace even with the manifold in place.

edjack 07-13-2015 03:09 PM

Quote:

Originally Posted by Zerodynamic (Post 9051491)
What condition were your hoses in?

Still soft and pliable.

energizedmortal 08-24-2015 02:50 PM

Quote:

Originally Posted by cn90 (Post 9051125)
Hi guys,

Just wondering what you guys think re Heater Hoses maintenance at 150K. Having owned many cars over the years, I understand that the heater hoses are unreliable after some 17y/150K miles.

In May 2006, at 90K, I overhauled the cooling system (rad, 2 rad hoses, WP, fan clutch, reservoir, belts, tensioners etc.). I did NOT touch the heater hoses.

There are about 7 hoses I want to replace (at the rear of engine, at heater valves, throttle body and the long hose from reservoir). The cost is about $100 or so. But I wonder what you guys think...


https://www.bimmerfest.com/forums/att...hmentid=506563


https://www.bimmerfest.com/forums/att...hmentid=506564


Hello CN90,

In your first illustration hose #12 on my 2003 does not go into the engine, it connects to the hose that is coming from the aux water pump. Do you know the correct part number for the hose I am referring to?

Update: found it part number is # 64218378369

cn90 04-13-2017 08:57 PM

Hi guys,

I started this thread in 2015 (2 years ago), now I need to revisit this issue as the car is 20 years old (build date was Sept. 1997) and with 165K miles.

If any of you ever had a busted heater hose(s), when did that happen (year/mileage)?

energizedmortal 04-14-2017 05:50 AM

Quote:

Originally Posted by cn90 (Post 10115356)
Hi guys,

I started this thread in 2015 (2 years ago), now I need to revisit this issue as the car is 20 years old (build date was Sept. 1997) and with 165K miles.

If any of you ever had a busted heater hose(s), when did that happen (year/mileage)?

192,000 miles/15 years and none have busted or leaked. At 190,000 miles none of them were leaking but I changed all except heater hose part# 64218378369. Going to use it as a test subject and let you know if and when it fails.

Burning2nd 04-14-2017 04:40 PM

Quote:

Originally Posted by TheHockeytowner (Post 9051293)
214k here, I've never touched them. Winter is effectively over in MI, so if they're waiting to break, now is as good a time as any.

216k


"TEST YOUR MIGHT!"

thats how i roll.. when she bleeds coolant I run red lights

540 M-Sport 04-14-2017 04:46 PM

CN90, I just do all the hoses, including the heater hoses as part of your proscribed 100k mile cooling system overhaul. ;)
So they've been replaced twice on my car now. They are cheap, and when everything else is being done, only adds an extra hour of work. Parts are cheap.

Even Mike Miller the tech from Roundel recommends 150k hose replacements (all of them). He says oem BMW hoses are some of the best quality around.


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