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Topic: 2.3 DOHC 16v overheating and overpressurising (Read 1232 times) |
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fundrpuss
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2.3 DOHC 16v overheating and overpressurising
« on: Apr 7th, 2008, 8:29pm » |
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Had my lovely Scorpio for about a year without any problems.Suddenly noticed her overheating fast, pulled over and stepped into a sauna. Replaced burst hose(lower to heater matrix, it was perrished slighty) checked thermostat,it was fine. Filled up system,bled every bubble of air.Runs for upto 3 mile,temperature soars to 3/4 gauge,and sounds like a pressure cooker.Spitting coolant from header tank overflow.Havnt checked water pump yet but im going to flush and back flush tommorrow with my fingers crossed,Any particular hoses to aim for first? Any suggestions? Have been locked to this site for a week now and have learned so much about my Scorpio but keep going of on a tanjent with so many great tips!
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solarpanel
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #1 on: Apr 7th, 2008, 8:55pm » |
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head gasket?
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solarpanel
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #2 on: Apr 7th, 2008, 8:56pm » |
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cracked head ?
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #3 on: Apr 7th, 2008, 9:47pm » |
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Two phrases i didnt want 2 hear!!!!!!!!! Was hoping to open pump and see missing bits of fins and wash them away with a hose!!!! I've always been the optimist.  Dont know if even with this site i can handle that job,but gonna give my best and then "phone a friend" if it beats me. Is the overpressure a sign of "crack/blown gasket"
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Scorpio_Mike
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Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #4 on: Apr 7th, 2008, 9:58pm » |
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Definately sounds like the head gasket has gone. You may be lucky and find it is just the gasket and the head isn't cracked. Have the cooling system pressure tested by a garage to confirm.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #5 on: Apr 7th, 2008, 10:11pm » |
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Will get that done before i muck about with flushing! waters perfectly blue,no sign of any corrosion/oil etc, was just hoping for a blockage as an easy/cheap option!As i said optimist 
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #6 on: Apr 7th, 2008, 10:34pm » |
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Oh well better get studying the forum /printing off , guess ill be back,probably on a regular basis for ideas/tips during this adventure.Just sold my house and dont have garage but its somethin to keep me going. Love this motor so much, gonna get her back on the road and happy.
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #7 on: Apr 8th, 2008, 1:05am » |
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I’ve had similar when I flushed out the system which was just an airlock.
An air lock can be quite difficult to shift especially if the matrix is a bit blocked which they often are, so worth another go at it. Try partly draining down, pull off the small hose to the heater matrix from the stat housing, hold the hose up high slowly fill the reservoir with coolant till it starts to run from the stat housing. Put your thumb over the hole, finish filling, and gently lower the hose till coolant comes from that, put your other thumb over it, now push the hose back as quickly as you can.
I fitted a drain valve into the top matrix hose so I could fit a length of tube and a funnel which I pour coolant into, open the valve and run the engine till bubbles stop coming out.
I would suggest covering the alternator with a plastic bag, the charging light has a nasty habit of staying on if you get antifreeze into it.
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ABS multiplug wheel sensor pins MK IV or MK 20
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #8 on: Apr 8th, 2008, 1:36am » |
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You've gave me a litle light and hope!!!!! the heater is workin as it should, the air,con smells of cheap curry but no damp on floor, asked last owner and he never used it much, or sunroof which has seized.(he had the car from just under 2 yr old and full service from same mechanic all its days).Havnt told him of these probs, older guy, love him 2 bits coz he real cool for his years and he would probably offer to pay for repairs. Gonna run half a loch through every hose and try it again till it gets dark . How does the atuo tensioner work? right hand thread and then? does it need reset or i does lossening the nut ,loosen the drive belt on its own?
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Tompion
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1997 2.3 Ultima estate.
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #9 on: Apr 8th, 2008, 1:50am » |
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The tensioner is self adjusting.
To remove the belt you put a long spanner on the hexagon at the centre of the pulley & turn (not the bolt that holds it to the block) – You’re not undoing anything, just relieving tension by turning the arm.
I don’t do it that way, I pull up the top run of the belt which makes the tensioner swing down I then wedge a bit of wood between the tensioner arm and the casting lugs on the front of the engine.
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #10 on: Apr 8th, 2008, 1:53am » |
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Have looked at darn near every post on this forum and loved the accuracy and honesty. The ford details and drawings although being a great help have left me a little lacking! the drive belt is a concern !!! want to check impellers on water pump but 1 piece belt covering so many parts worries me that i'm gonna throw off so many parts if i mess up......Hints tips ?
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #11 on: Apr 8th, 2008, 1:58am » |
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You a mechanic or just a very clever peep? that was a way i was taught years ago but being an amatuer at these things nowadays and engines being so sensitive i was nervous to employ old strong arm tactics......
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #12 on: Apr 8th, 2008, 2:00am » |
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If that slips how the hell do i get the belt back on due to the the pressure?
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Tompion
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1997 2.3 Ultima estate.
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #13 on: Apr 8th, 2008, 2:14am » |
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You'll either have to use a long spanner or lever something against it, plenty of scope for skinning your knuckles so gloves are a good idea.
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ABS multiplug wheel sensor pins MK IV or MK 20
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #14 on: Apr 8th, 2008, 2:31am » |
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That sounds so much fun!!!!! Havnt lost a good lump o skin for so long.... Memories!!!! I take it i go left and then wedge.... I last owned a rover before i got back to big Ford fun!!!! Will that be enough or do i need to jam some part of the belt drive?
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #15 on: Apr 8th, 2008, 3:38am » |
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Thot about it and got it!!!!! Never worked on my scorp before but have worked on lots o big fords in the past( Consuls/ granadas  showin ma age)(long time back) and just a bit nervous of how delicate they have become!
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #16 on: Apr 8th, 2008, 3:54am » |
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Just thot about it and going left against a right threade bolt ok! but wont take tension off belt!!!!!!!! Where should i wedge belt/drive
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #17 on: Apr 8th, 2008, 10:12am » |
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You push the tensioner down in a clockwise motion, so should not be pushing against the thread
Just a thought, are the cooling fans working okay ?
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5stud
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #18 on: Apr 8th, 2008, 11:26am » |
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haynes 3984 galaxy manual covers16 V Y5B and 8V NSE as used in scorpios
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fundrpuss
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Re: 2.3 DOHC 16v overheating and overpressurising
« Reply #19 on: Apr 10th, 2008, 2:22am » |
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Hey thanks for all the advice!! Due to a couple of unseen problems (domestic) havnt got round to flushing system yet but having read(extensivly) more postings and breakdowns (as in looking at head gasket replacements/Cracks etc) I,m contimplating giving it a go,soon!,if flushing dont work....nervous but keen! will get back asap after i give first step a go...Cheers....
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