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Coolant Hoses Change Question

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Old 02-28-2016, 09:40 AM
  #16  
The Deputy
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Yep, and that's why I quit doing "side-jobs" for folks.

Usually, if they are to broke or cheap to pay the price at a regular shop...they are either to broke or cheap to pay for quality parts.

However, they sure don't mind coming back to me and voicing their complaints about a part failing prematurely...and expecting me to change it for no charge. Even after giving them the choice of...the best, better, cheapy or good enough to last until you sell it tomorrow parts prices.

Buy quality parts...it's worth the extra dollars.

Brian.
Old 02-28-2016, 09:49 AM
  #17  
Bertrand Daoust
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I will order the new hoses from Roger.

I think he sells original Porsche hoses.
Roger can confirm this.

Doc,
You're right (like always) when you say that hoses are cheap and should be changed.
What's stopping me (for now) is that I'm not familiar removing some of them.
I did remove a few when I did the WP/TB jobs but never touched all the others.

Some don't look that bad.
But to be honest I'm a bit scared to try to change #1, #2 and #33.
They're quite deep in there to me!
We'll see.

Thank you all for the good advices.

Last edited by Bertrand Daoust; 02-28-2016 at 11:55 AM.
Old 02-28-2016, 12:11 PM
  #18  
dr bob
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Remove the air cleaner housing to get the rear hoses. The heater control valve will be loose in your hand at some point, and is considered by many to be a regular maintenance part. Look hard at the fitting on the back of the pass side cylinder head for corrosion damage too.

The most challenging hose is that short section between the bottom of the coolant reservoir and the steel Y pipe that runs along the pass side fender wall just above the exhaust. I find it easiest to get to from below, but "easiest" is relative. That piece lives in the second harshest location of any of the hoses, so it really can't be ignored.

Borrow a pressure tester from your favorite local parts store to verify no leaks when you are done.
Old 02-28-2016, 12:43 PM
  #19  
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I plan to change the heater control valve small pipe (#4) for sure.

Been there many time (without changing the hose Grrrr!) so no problem with that one.
The control valve is about five years old so still good for a while I think. I'll check if it holds vacuum.

The last time I removed the intake, I broke the passenger side fitting you're talking about.
Don't know what happened. Put a new one (to me) there. Thanks Luc!






I might try to remove the coolant tank to reach the #33 hose or take a look from under the car like you suggest. I hope the "third bolt" on the tank is not in place. We'll see.

Thank you.
Old 02-28-2016, 01:22 PM
  #20  
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If you don't mind removing the reservoir, that little hose underneath is a lot easier.

Have fun!
Old 03-01-2016, 12:25 PM
  #21  
Tom in Austin
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The other trick is you have to move the windshield wiper motor aside to get out the heater hoses. No idea why, but when I did this my intermittent wiper relay quit and when I put back the motor it was out of synch and had to be re-clocked. Hopefully you will not experience these oddities, but just in case ...
Old 03-01-2016, 08:51 PM
  #22  
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??? Changed mine without removing the wiper motor. Tight getting to the heater core clamps but doable.
Old 03-01-2016, 09:33 PM
  #23  
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Guys,

Did you remove the hood to get to those?

I looked and I'm not sure if I would be able to do it with the hood in place.

BTW, I checked my coolant tank and the third bolt is not there.
Should not be that bad removing the tank.

Won't touch anything until later this month.
When the weather gets milder.

Thanks.

Last edited by Bertrand Daoust; 03-01-2016 at 10:22 PM.
Old 03-14-2016, 12:18 AM
  #24  
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A little update on this.

All the hoses are removed.

Everything went smoothly.

Now, time to order new hoses and do some cleaning.
And have few parts plated maybe...

Old 03-14-2016, 12:43 PM
  #25  
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The steel fenderwal Y pipe is a candidate for close inspection, mostly for corrosion from the inside and remaining wall thickness. If the outside plating is still intact and there's enough metal underneath to hold coolant, I'd try Rob's "Twinkle" copper polish trick on it, and treat it to a couple coats of high-temp rattle-can clear to keep it pretty ongoing.

Reservoir is a candidate for new.

Use extreme caution while removing and replacing the level switch assy. Fragile, and white-capped replacements can be spendy.

The pressure switch in the middle of the vent line is fragile and may be NLA.
Old 03-14-2016, 02:31 PM
  #26  
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I tried to reuse my Coolant Reservoir and cracked the bottom of the tank while reinstalling it. I recommend you replace it. It's 34 year old plastic that had a 15 year design life.
Old 03-14-2016, 02:49 PM
  #27  
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Originally Posted by Bertrand Daoust
A little update on this.

All the hoses are removed.

Everything went smoothly.

Now, time to order new hoses and do some cleaning.
And have few parts plated maybe...

As I recall sometime back Dr. Bob recommended long reach hose grip pliers from Harbor Freight, http://www.harborfreight.com/catalog...?q=hose+pliers

These helped me for getting the connection on hose 33 both at the reservoir and at the Y. A little dish soap too on the inside of the hoses helps.

One of the biggest PITA jobs out there.

All the best,

Joe
Old 03-14-2016, 11:24 PM
  #28  
Wisconsin Joe
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Originally Posted by dr bob

...The pressure switch in the middle of the vent line is fragile and may be NLA.
If by "pressure switch", you mean the pressure senor (that trips the CWL when pressure drops), # 928 641 512 00, I don't know how fragile it is, but they tend to seep when they get old.

Roger has them. Just under $100. Got one a couple weeks ago.

If you meant something else...

Nevermind.
Old 03-15-2016, 01:44 PM
  #29  
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That's the one. IRRC, those were scarce for a while.
Old 03-15-2016, 01:54 PM
  #30  
Rob Edwards
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If you can find some, get a blister pack (or a bottle) of P80 rubber assembly lube, makes life about 1000x better when trying to shove a dry heater hose 4 inches up over the end of the Y-pipe.


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