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Unread 09-15-2011, 08:24 AM   #1
ads
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1995 YJ Wrangler 
 
Join Date: Mar 2011
Location: Dubai, UAE
Posts: 39
Temperature issues

Hi all,
Am having some issues with overheating - seems to have stumped all the garages out here I've taken it to.

Everything was fine until my water pump decided to die on me and I had it swapped - I have zero faith now in the garage which did the swap but they do specialise in 4x4 vehicles and work on a load of YJs - so other than blatant overpricing and giving me the YJ back with a punctured hose (which wasn't there before) I think they did an ok job. (ie - I think / hope that the new pump is pumping in the correct direction).

However since then I have issues with overheating at idle and at speeds of over 110 kmph - the temp gauge will sit at around 200-210 at 80 kmph but rise to around 220 at 120 kmph - and will steadily rise to 250 ish if I sit at idle and dont rev it to 2k+ every 2 minutes for a bit.
I have had the thermostat valve replaced and the coolant flushed + radiator opened and cleaned - the fan clutch seems fine (according to the 2nd garage I have taken it to which I trust to actually do a good job)

The issue which seems to have them at a loss for a reason / solution is that every couple of days I will park and leave the car - only to come back to a puddle of coolant on the garage floor and my reservoir half full / completely empty - I have caught the leak in action and it is coming from through the reservoir lid rather than any hoses etc. I also get a stream of coolant coming from the hose which goes from the top of the radiator to the reservoir tank whilst this is happening.

Any ideas of what could be causing this? (and sorry for the long post!) - the temperature fluctuations I can deal with but its a pain having to carry around a load of coolant for the mornings where the YJ has decided to vomit on the floor.

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Unread 09-15-2011, 08:38 AM   #2
oldtime_ironman
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1991 YJ Wrangler 
 
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It may seem odd to ask this, but what about the radiator cap? They are supposed to open up into the overflow hose at abnormal pressure. But I don't think the temperature you describe would cause it to open if it was OK. If the radiator is not holding pressure properly, due to a faulty cap, then the temperature will rise.

.

Last edited by oldtime_ironman; 09-15-2011 at 08:40 AM.. Reason: description
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Unread 09-15-2011, 08:43 AM   #3
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Possibly - its still the stock cap & looking a bit worse for wear.
Will try swapping it and see if that helps at all.

Thanks!
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Unread 09-15-2011, 11:25 AM   #4
Berniebikes
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First thing I would check is whether or not you got the right water pump put in. I'd go here and read this thread carefully and then check your pump and numbers to make sure. I've seen more than one person with the same issue find out they had the reverse rotation on a new pump!!!

http://www.jeepforum.com/forum/f12/w...torial-893428/
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Unread 09-15-2011, 01:01 PM   #5
ads
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Aye - I could remember some threads from a while back where the wrong flow direction pump had been installed - had a look back but couldnt find it.
Thanks for the thread you linked, another thing to check tomorrow.

I half want it to be the wrong pump..... oh the fun I'll have at the garage next week if it is....
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1995 YJ - mostly stock at current. 31" Procomp AT, rebuilt stock springs with added leaf (2.5" lift), OME shocks & stabiliser, 20gal tank mod, air box de-restricted, afe wet filter, soundbar, new distributor/rotor & stuff, TBS.
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Unread 09-15-2011, 01:46 PM   #6
Berniebikes
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keep us informed, I'm curious what you find.
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Unread 09-15-2011, 02:04 PM   #7
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All I can see on the pump is ph 692 - but a google search thingy doesnt help there.
Any ideas?
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1995 YJ - mostly stock at current. 31" Procomp AT, rebuilt stock springs with added leaf (2.5" lift), OME shocks & stabiliser, 20gal tank mod, air box de-restricted, afe wet filter, soundbar, new distributor/rotor & stuff, TBS.
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Unread 09-15-2011, 02:26 PM   #8
Berniebikes
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That would be pump WP-853 as pictured here on the ASC web site

http://asc-ind.com/showmetheparts/

Not sure if that is the right part for your application or not
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Unread 09-15-2011, 02:32 PM   #9
ads
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Cheers - so its not that then.
Will replace the radiator cap next, and get a proper garage to check that the pump is working as it should. Oh the joys of owning an old jeep
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1995 YJ - mostly stock at current. 31" Procomp AT, rebuilt stock springs with added leaf (2.5" lift), OME shocks & stabiliser, 20gal tank mod, air box de-restricted, afe wet filter, soundbar, new distributor/rotor & stuff, TBS.
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Unread 09-18-2011, 10:35 AM   #10
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Well, swapped the radiator caps today (thanks to robbies motorsports... if your ever in the UAE and need a garage, can't recommend them enough) and it seems to have made a huge difference.
I still hit 210 sometimes (but never above, which it regularly was at before) but usually its around 190-200 ish, and thats with it still being stupidly hot & having the AC on full.
Also - even though it might just be my imagination - it seems like I have gained a decent amount of power and my AC is much, much colder than before.

Thanks for the suggestion, far far better now
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1995 YJ - mostly stock at current. 31" Procomp AT, rebuilt stock springs with added leaf (2.5" lift), OME shocks & stabiliser, 20gal tank mod, air box de-restricted, afe wet filter, soundbar, new distributor/rotor & stuff, TBS.
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Unread 09-18-2011, 01:24 PM   #11
oldtime_ironman
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Quote:
Originally Posted by ads View Post
Well, swapped the radiator caps today (thanks to robbies motorsports... if your ever in the UAE and need a garage, can't recommend them enough) and it seems to have made a huge difference.
I still hit 210 sometimes (but never above, which it regularly was at before) but usually its around 190-200 ish, and thats with it still being stupidly hot & having the AC on full.
Also - even though it might just be my imagination - it seems like I have gained a decent amount of power and my AC is much, much colder than before.

Thanks for the suggestion, far far better now
the 210 is normal maximum for the stock thermostat - Glad it works!
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