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Pipes to the oil filter housing

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Old Apr 14th, 2018, 20:08   #1
Skyedriver
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Default Pipes to the oil filter housing

Carrying out yet another oil/filter change today and looked at the two "rubber" pipes that clip onto the oil filter housing.
They are looking a little tired and I think it's time they were changed. One looks easy enough,the other would be easier to do without the filter in place so guess it'll have to wait for the next change but, when I disconnect them what'll empty out? Just the oil filter or a whole lot more?
Assume these aren't under pressure at all?
Thanks
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Old Apr 14th, 2018, 21:27   #2
classicswede
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Those rubber hoses are coolant pipes
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Old Apr 14th, 2018, 23:16   #3
Dirty Rooster
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One of my Volvos died from a rupture in the short S-shaped pipe under there.
I think it was a poor design,
but replacing them with good new ones is a great idea.
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Old Apr 14th, 2018, 23:42   #4
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While you have them off thoroughly check the steel pipe that sits above them. At the age of these cars and with just a little poor maintenance the wall thickness of the waterpump bypass pipe can get VERY thin...
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Old Apr 15th, 2018, 10:51   #5
ericbeaumont
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I'll second that.

When you take off the hoses the drain valve will need cleaning out, but that's easy. Coolant pipes are a different matter, and if previous owners used rad sealants or hard water then all sorts of crud will reduce the diameter of the pipes - rubber and metal - and an unamusing search will have to be made to ensure the system is clear.

I started out with an HG job and ended up stripping the entire turbo coolant system, the water pump & heater pipes and anything else nearby. Those little rubber pipes were completely blocked and so was much of the pipework - oil and water, and the metal filter box down there took up several days of poking and soaking in various chemicals, shaking and washing before it was clear. Never worked out why the turbo didn't pack up. Water pump was the only part that didn't need much cleaning.

Good tool to poke and scrape: strip off half an inch of plastic sleeve from a length of net-curtain wire, unwind the end coil to give a pigtail, and rotate up a pipe.

Ash's comment is spot-on: the red spur pipe (from the little rubber water hose and up to the block) may rust near the bottom end where the hose overlaps the pipe. Mine had rusted through; I cleaned the hole (wire brush/file inside & out) and sealed it with J&B weld.

Could be a can of worms, but one best opened.
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Old Apr 15th, 2018, 11:00   #6
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Thanks everyone, hadn't realised they were carrying water, assumed (never assume I was once told) they were an oil drain or something.
Look forward to replacing that lot in the near future. Sounds like I need to allocate more than half an hour to it!
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Old Apr 15th, 2018, 18:58   #7
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This is, like, a cool quote ;
Quote:
Originally Posted by ericbeaumont View Post
Could be a can of worms, but one best opened.
While we're on the subject I swapped in a whole 1991 engine after mine died of that damned hose down under and I was pleasantly surprised that my new (old) engine has a much better coolant pipe and oil pipe arrangement.
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