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Lower rad hose leak

 
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Eliza  



Joined: 17 Aug 2015
Posts: 47
Location: Prov. Utrecht, The Netherlands

PostPosted: Fri Jun 08, 2018 3:16 pm    Post subject: Lower rad hose leak Reply with quote

Hi all!

Need a bit of wisdom from you guys. I'm at a loss...

A couple of months ago I changed my lower rad hose as I saw the alt belt had eaten a groove into the old one at some point before I got the car. Didn't trust this very much and bought a brand new hose ( original).

Somehow, I never got the new hose to seal well on the water pump flange. Always dripped a bit, coolant left a trace on the hose. Seeping out from between the flange and the hose above the hose clamp.

Now the weather got hotter, problem gets worse. I tried to tighten the clamp a bit, didn't really help. Tried a different hose clamp, still loses a few drops.

I want this tight! Any tips, anyone seen this before? All is dry above the seepage point.
It's not something to do with the waterpump weep hole, right? I would assume that weep hole sits higher on the pump housing that the flange? Anyone know where it is?

Please please put me out of my misery

Thanks in advance,

Eliza
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morghen  



Joined: 21 Jan 2005
Posts: 7888
Location: Romania

PostPosted: Fri Jun 08, 2018 9:01 pm    Post subject: Reply with quote

Which clamp did you tighten?
Where is the leak? hose-water pump, or hose-radiator?

Perhaps you should take the hose off, light wirebrush the water pump flange and the alternator flange, then if it still leaks, clean and degrease and smear a bit of victor reinz black silicone on both flanges before installing the hose.
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 733
Location: Maysville, Colorado

PostPosted: Sat Jun 09, 2018 12:10 am    Post subject: Reply with quote

Morgen is right, I have seen the water pump neck grow a lot of corrosion deposits and over time the hoses seem to decompose a little and leave deposits on the aluminum also.
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Eliza  



Joined: 17 Aug 2015
Posts: 47
Location: Prov. Utrecht, The Netherlands

PostPosted: Sat Jun 09, 2018 4:18 pm    Post subject: Reply with quote

@Morghen,

at the water pump flange end.

@both,

yep, corrosion/coolant buildup on the flange sounds reasonable. Not sure the flange was cleaned carefully when the new hose was installed.

I have this one and a few other new hoses on order and garage time booked, and this time I'll do the cleaning and reassembly myself. Might as well replace all hoses that look past their best while I'm in there.
However, I need to tighten things up enough for my car to survive the 50 km drive to the garage, and take a supply of coolant in case I need to refill on the way.

I hate this. Would love to drain the system myself and see to things, but I'm a bit skittish about the mess I will make, with no way to jack the car up and an unhealthy fear of the intricacies of cooling systems. I guess I'd better just wait until my trusted mech shows me how to do it right

Thanks!

Eliza
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924RACR  



Joined: 29 Jul 2001
Posts: 8115
Location: Royal Oak, MI, USA

PostPosted: Sat Jun 09, 2018 10:32 pm    Post subject: Reply with quote

+1 to cleaning the flange, and new clamp too...

Whenever possible, I try to tighten the clamps with a nutdriver instead of a screwdriver, for more positive torquing.
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Eliza  



Joined: 17 Aug 2015
Posts: 47
Location: Prov. Utrecht, The Netherlands

PostPosted: Wed Jun 20, 2018 4:14 am    Post subject: Reply with quote

Time for a follow-up

Leaks all sorted. It was the water pump after all, leaking quite a lot of late out of the infamous weep hole. With the pulley off, the weep hole is easily seen... well, weeping.

New pump, new belt (while we were in there ), new rad hoses, clamps of course, and a new-to-me uncracked reservoir and cap.

All good to go again!

Thanks for your help,

Eliza
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ted von Kampen  



Joined: 14 Oct 2016
Posts: 96
Location: Scottsbluff, Nebraska

PostPosted: Thu Nov 01, 2018 9:59 am    Post subject: Weeping lower hose Reply with quote

Eliza,
It sounds like your problem is fixed already. I ran into much the same thing with my 924. I ordered the replacement hose and it would not slide over the WP flange. (new WP) so I got the brilliant idea of using the old WP flange as a mold. Put the old WP in a vise & I lubricated the WP flange and the inside of the new lower hose with some hand cleaner (such as goop) and then slowly worked the hose up over the flange. It fit very tight but after expansion I installed a good clamp. I let sit a bit then used a heat gun to make the rubber more pliable. Did this a couple times and let is sit overnite. When I removed the clamp the hose pretty much stayed expanded. I then relubed the new wp flange and the inside of the new lower hose again and slipped over the new flange. It slid easily and seated well and I put a new clamp on. Works good. Thought I would pass the tip to you.
TEd
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