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 Posted: Jul 20, 2015 06:01PM
jeg
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armycook, have you got the proper (short) screws for the fan shroud or is it possible that one bottomed out an punched a hole?

The peasants are revolting...          

"Gone with the Wind" - a brief yet moving vignette concerning lactose intolerance

 Posted: Jul 20, 2015 05:25PM
 Edited:  Jul 20, 2015 06:13PM
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I apologize for piggy backing on this thread. Its related and I dont wanna waste space.

My car just pissed coolant all over.. Just now when I got home. No over heat thank God. Checks good on radiator cap, all hoses and clamps except after I jacked my car up and turned the wheel, there it is dripping just above the bottom radiator thick hose. Turned the engine off, and cleaned every inch I could reach in there around the radiator and placed clean paper towel to find out where its coming from. Started the car again and it looks like its coming frm the area I highlighted in green (im a very visual person). I would suspect it would drip from the most bottom part which is the hose but it isnt. Somehow its dripping from somewhere higher. Might have a crack somewhere on the rad. Its already 1830 here so will investigate this further this week. This radiator looks like its been repaired and I think its about time to get a new one.

It leaks at about 1 drip per 5 seconds.

radiator

 

 Posted: Jun 2, 2012 06:35AM
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CA

When you checked all the hoses for leaks, did you retighten all the clamps? New hoses tend to settle in and end up loose. I've had to tighten the clamp screws 2 or 3 turns after changing hoses. Repeat periodically until clamps stay tight.

.

"Hang on a minute lads....I've got a great idea."

 Posted: Jun 1, 2012 06:34AM
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US

Like someone suggested on the oil leak thread, isn't there a dye you can add to trace a coolant leak?

Terry

 Posted: May 31, 2012 08:19AM
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mine had a leak acting chronologically just like that.

it took 4 tries with replacing the thermostat housing to get it fixed ( when it leaked intermittently I finally was able one time to see it). I tried several different types of gaskets, only the dry paper one installed with NO gasket adhesive worked. Be sure the thermostat bolts do not bottom out in their hole, if so there will not be enough clamping pressure. Chase the threads out and blow it clean before bolting it down.

 Posted: May 31, 2012 08:18AM
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CA

While my 1380 is "leaking" a little oil, it has never puked coolant...mind I only fill to the top of the core and leave the expansion tank empty.

 Posted: May 31, 2012 07:04AM
mur
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I'd suspect the water pump as well, however an EXPANSION tank is always a great idea for a 1300.  Use the blanking cap and put the pressure cap on the tank.

 Posted: May 31, 2012 05:50AM
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One other thing you may want to look at is the water pump,i have seen this happen before on another car. The coolant would only leak after the car was run normally,it took the tech a while to finally figure out where it was coming from.He determined it was coming fron the weep hole that at the bottom of the pump and the car did not have a bunch of miles on it either.Seems that the seal which has carbon in it as part of the seal was defective and cooled at a different rate than the pump causing the leak.Hope this helps.

Minsuki

 Posted: May 31, 2012 04:37AM
 Edited:  May 31, 2012 04:41AM
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You said you have new hoses. I'd start there. I had the little 2" radiator bypass hose fail (split down the seam) after only about 800 miles, last year. It leaked for several weeks, and I couldn't find it for the life of me, becuase it's tucked in behind the block, radiator, etc and the symptoms were kind of erratic, similiar to what you describe. I wasn't too concerned, though becuase all the hoses were new and the leak was only small. I never was able to find it before it failed catastrophically on the road one day. I'd get a dental mirror and have a look around. It's a crappy job to replace it, because everything has to come out.  If it is that hose, try an uprated hose or a different supplier, because allegedly there are some out there that are prone to failure.

 

Pete

 

Refitting is the reverse sequence to removal. 

 Posted: May 31, 2012 04:01AM
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US

I know I'm blind but I did not see where you mention the engine size. The 1275 engines love to push water out after a drive. As mentioned above install a recovery tank in the system and this will stop. The MG1100 and the MGB brass ones are nice and the plastic ones made to look the same are a personal favorite. If you want to run a simple test place your rad over flow hose in a water bottle and tape it some place under the bonnet. If you place the tube at the bottom of the bottle it will suck the lost fluid back in.

Steve (CTR)

 Posted: May 31, 2012 03:42AM
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US

do you have a overflow catch can for the radiator??

if you do not have a catch can, buy one and hook it up. if you already have one on the car, i would say water pump or the by pass hose.

take your time and after you have run it up to temp, grab a mini world magazine and lay under the car and wait for it to cool down and watch for the drip 

 Posted: May 31, 2012 03:11AM
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OK, I've checked everything and this is getting annoying:

A+ engine, with a new radiator and hoses.

Pressure test of system holds 15psi for 15 min+, with no sign of pressure loss. Pressure test of cap shows 15psi (actually closer to 16 or 17psi).

But, every time I come home after a long drive, after the car has fully cooled down there is a pool of coolant under the car. This seems to happen as the engine cools, because there is no apparent leak when parked at my destination while I am out (engine hot). Also, there is no leak when the car sits cool, no matter how long. The leak only occurs after the engine has been run up to fully warm, and then is allowed to cool back down.

It is not an overflow from an overly full system (my first suspicion), because over time, because of this leak, the radiator does get too low and must be refilled (looking down the filler neck when cold the core is high and dry).

I have searched all over the engine and related hoses for any sign of a leak, but have so far found none. The pool seems to be from the "front" of the engine, indicating a leaking water pump or thereabouts. There is no sign of leaking from either the radiator or any of the hoses or joints.

The darned thing is, besides not being able to find the source of the leak visually, also not finding evidence of a leak by a pressure test!

One thought was maybe I fitted the wrong length of radiator cap (don't the early year radiators use a long, 34mm cap?), but since the radiator is a new super 2 (uses the short cap), and the cap is a 25mm, they both measure out good.

Since the leak seems to happen when cooling (anyway it seems that way), my ideas of over fill, or wrong filler neck wouldn't be it, would they. But I am struggling to think of what would leak when cooling down. Any kind of a crack, or leaking seal should show up in a pressure test...

Any ideas?

Norm "losing my cool" Kerr

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