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coolant hose replacement time?

GranburyChuck
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GranburyChuck Member

GranburyChuck

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Just wondering what everyone thought about replacing the coolant hoses on the 996? I have a 2000 model with 109k miles. Looking under the engine some of the hoses look a little bit ragged. Also, the coolant could be replaced too I guess even though Porsche says it is lifetime fluid. I kind of doubt anything is lifetime, at least for the dealer that is up after your warranty is up.

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kbull88 Member

kbull88

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I just replaced my water pump, hoses, coolant recovery tank, cap, power steering pump, and hoses last week. I have a 2000 C2 with 81k and didn't want to wait for the water pump to go out on me. So I took the initiative and replace them all. Just replaced the polyrib belt during the 75k service, so I didn't need to replace it.

Basically it was cheap insurance. The water pump is likely to go at any time after 75k and didn't want to risk toasting the motor.

Hope this helps.

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kbull88 Member

kbull88

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P.S. I also replaced the pulleys and tensioner. Since they have to be remove the power steering pump to replace the pulley tensioner, figured might as well replace it while it was off.

It only takes a couple of gallons of Porsche coolant $25 each and a liter of Pentosin CHF 202, which was only 19.00.

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GranburyChuck Member

GranburyChuck

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I just replaced my water pump, hoses, coolant recovery tank, cap, power steering pump, and hoses last week. I have a 2000 C2 with 81k and didn't want to wait for the water pump to go out on me. So I took the initiative and replace them all. Just replaced the polyrib belt during the 75k service, so I didn't need to replace it.

Basically it was cheap insurance. The water pump is likely to go at any time after 75k and didn't want to risk toasting the motor.

Hope this helps.

Kbull,

Did you replace all of the hoses or just the ones at the bottom of the engine? The ones up by the cooling fans?

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deanslist.us Member

deanslist.us

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I just did a water pump, t-stat, and hose replacement on my '99 996 C2 (81k miles). Parts and instruction thanks to Renntech!

:renntech:

& I Love Sunset Imports (thanks to Jeff Clark)

It is always nice to be surrounded by the lowest cost OEM parts and knowledgeable people that are ready to help.

From what I have read, the coolant hoses nearest the engine need to be replaced at around 65k as preventative maintenance, due to the amount of heat exposure from the motor. I had accidentally broken part of a four-way hose (barbed nipple on top tee off of coolant expansion tank), but after inspecting the rest of that hose, I discovered cracking on both tee joints, and when removing found that one portion of the hose was fusing to the metal pipe that run alongside the motor (had to literally cut it off). Now I am waiting till after my clutch job (shop) to get back under the car and replace the other coolant hoses near the motor...and inspect for further damage that engine heat may be causing to other components.

159.jpg

Edited by deanslist.us
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packetstorm88 Member

packetstorm88

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I just replaced my water pump, hoses, coolant recovery tank, cap, power steering pump, and hoses last week. I have a 2000 C2 with 81k and didn't want to wait for the water pump to go out on me. So I took the initiative and replace them all. Just replaced the polyrib belt during the 75k service, so I didn't need to replace it.

Basically it was cheap insurance. The water pump is likely to go at any time after 75k and didn't want to risk toasting the motor.

Hope this helps.

What did all of this run you? I've got a 99 C2 with 53k and am considering doing the same. Thanks for your help!

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JeTexas Member

JeTexas

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At about 90k miles I replaced the two hoses on the bottom of the motor and the two that run from the motor up towards the front of the car. Only the two on the bottom of the motor looked THAT bad, but in Houston heat, it's cheap insurance. I inspected the hoses up by the radiator and they still look perfect after 100k.

As for the "lifetime" coolant, I don't believe it. I flushed it all when I did the hoses.

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GranburyChuck Member

GranburyChuck

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At about 90k miles I replaced the two hoses on the bottom of the motor and the two that run from the motor up towards the front of the car. Only the two on the bottom of the motor looked THAT bad, but in Houston heat, it's cheap insurance. I inspected the hoses up by the radiator and they still look perfect after 100k.

As for the "lifetime" coolant, I don't believe it. I flushed it all when I did the hoses.

Hey Je know what you mean by the heat, north Texas (FW here). How did you change the coolant? Did you get the machine to suck it through? I've read that is the best method.

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JeTexas Member

JeTexas

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I could have sworn I posted the hose part numbers with photos and costs last summer, but I can't find the thread.

There's a thread on flushing your system by just adding in water, running it, draining it, adding water, running it, draining it, etc. I drained quite a bit of coolant changing the hoses, but afterwards instead of spending the time going through that process I decided to pay Firestone $100 to use their vacuum system to flush it the next time I got an oil change.

I'll look up the hose costs tonight. The toughest part of it all was finding the right ones because the part numbers had changed so many times since 99.

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