Author |
Topic: Suspect air lock (Read 6555 times) |
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
 
Posts: 550
|
 |
Suspect air lock
« on: Oct 8th, 2006, 1:48pm » |
 Quote  Modify
|
Hi, suspect i've got air in my system,temp gauge occasionally drops then goes up or doesn't rise on start up then suddenly shoots to correct reading after 3 miles or so(Doesn't do it all the time). What's the easiest way to remove air from the system without removing coolant?
Heard something about running engine up to temp without pressure cap on header/expansion tank is this a good way?
Guy.
|
|
 IP Logged |
|
|
|
Highlander
Moderator
Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
|
|
Re: Suspect air lock
« Reply #1 on: Oct 8th, 2006, 2:22pm » |
Quote Modify
|
park it facing uphill and run the engine.
Ive got one does the very same though i'm sure its the temp sender
|
|
IP Logged |
on Oct 17th, 2011, 12:35pm, Simmo wrote:I give up !  Too much for an old boy!  |
|
|
|
|
Simmo
Administrator
I'm an OAP !
Posts: 5508
|
|
Re: Suspect air lock
« Reply #2 on: Oct 8th, 2006, 3:27pm » |
Quote Modify
|
Try the 'Johnnycab' method. Here
|
|
IP Logged |
Now I'm an OAP
|
|
|
twinturbo
Full Member
24V's Me game!
Posts: 904
|
|
Re: Suspect air lock
« Reply #3 on: Oct 9th, 2006, 9:03am » |
Quote Modify
|
Have you tried reseating the guage sender plug?
Mine was getting a bit jumpy, puled plug off, back on and it's been rock solid since..
TT
|
|
IP Logged |
|
|
|
Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
|
|
Re: Suspect air lock
« Reply #4 on: Oct 9th, 2006, 10:09am » |
Quote Modify
|
I've had this due to 2 different causes on 2 separate occasions. First time, connection to the sender for the temp gauge was broken. Second time, air lock.
With the engine at operating temperature (or at least not cold so the temp gauge has, or should have, moved) check the tightness of the sender connection. It is the single wire connection IIRC above the top hose. The one with 2 wires is for the engine management and controls fans etc.
|
|
IP Logged |
Life after the Scorpio ain't easy..
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #5 on: Oct 9th, 2006, 1:59pm » |
Quote Modify
|
Cheers Dave, will have a look at that, how did you get rid of the air lock?
|
|
IP Logged |
|
|
|
Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
|
|
Re: Suspect air lock
« Reply #6 on: Oct 9th, 2006, 7:26pm » |
Quote Modify
|
Just parked it facing up a slight hill and ran it with the cap off, seemed to do the trick  Remember to top it up nice and slowly if required.
|
|
IP Logged |
Life after the Scorpio ain't easy..
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #7 on: Oct 9th, 2006, 9:04pm » |
Quote Modify
|
Cheers Dave, will give both ideas a bash tomorrow.
|
|
IP Logged |
|
|
|
twinturbo
Full Member
24V's Me game!
Posts: 904
|
|
Re: Suspect air lock
« Reply #8 on: Oct 10th, 2006, 12:52pm » |
Quote Modify
|
You could also check and see what the Electronic readout is on the DASH to make sure it's not just a guage fault..
TT
|
|
IP Logged |
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #9 on: Oct 11th, 2006, 1:05pm » |
Quote Modify
|
TT, I checked the reading on the dash and it's all over the place! it varies from about 80 up to 150 constantly changing and never settling in one place ie within 10 ie 90 to 100. Can't find the temp sender, could someone take a pic for me so I can find it and give it a check over. If for some reason it's ok(Though it's looking good this is causing the trouble)does anyone have any other ideas?
|
|
IP Logged |
|
|
|
Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
|
|
Re: Suspect air lock
« Reply #10 on: Oct 12th, 2006, 2:13am » |
Quote Modify
|
Have you recently changed the coolant?.....re-filling the system too quickly will cause an airlock
If the airlock has developed for no reason, then you must have a leak somewhere 
If the temp sender & wires are okay, then an erratic temp guage (in my experience) is usually caused by either the thermostat being faulty, or air collecting around the thermostat & preventing it from functioning properly
Hope this helps
|
|
IP Logged |
|
|
|
Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
|
|
Re: Suspect air lock
« Reply #11 on: Oct 12th, 2006, 7:33am » |
Quote Modify
|
Haven't got camera at the mo but if you look at the front of the engine above all the pulleys, around the top hose area there are 2 connections. 1 has 2 wires, the other has 1 wire. The 2 wire connection senses temperature for the ecu, the single wire connection is just for the gauge. I will see if I can dig out an old photo as I know I have taken then in the past.
|
|
IP Logged |
Life after the Scorpio ain't easy..
|
|
|
Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
|
|
Re: Suspect air lock
« Reply #12 on: Oct 12th, 2006, 7:41am » |
Quote Modify
|
Woo hoo, found my old post from 1 year ago!
Pic is of the 2 temperature senders. They plug in to the top hose housing. The larger one on the left (just below the housing) is for the ecu. The smaller one to the right is for the gauge.
If the gauge sender is wobbly then it is broken as mine was.
Hope this helps.
|
|
IP Logged |
Life after the Scorpio ain't easy..
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #13 on: Oct 12th, 2006, 7:42am » |
Quote Modify
|
Cheers Dave, do you know which one feeds the on board diagnostics(OBD)? If both are fluctuating and it's from 2 different inputs that would suggest an airlock,if it's one input that feeds both the gauge and the obd then it could be that sensor.
Guy.
PS My fuel effeciency appears to be awful at moment i'm doing alot of town runs, even so struggling to get 250 from a tank,related to temp problem?
|
|
IP Logged |
|
|
|
Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
|
|
Re: Suspect air lock
« Reply #14 on: Oct 12th, 2006, 7:48am » |
Quote Modify
|
Well the larger sensor going wrong would affect fuelling, but the 24v will nto do well on juice around town anyway.
Best thing to do is go through the procedure to get rid of any air first then see what you are left with. If the air is got rid of then comes back you need to check connections, the reservoir and the cap etc as it must be getting in.
If it comes down to the senders then they are not dear.
As Jonny says it could also be the thermostat at fault but probably bestto check for and get rid of any air first
|
|
IP Logged |
Life after the Scorpio ain't easy..
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #15 on: Oct 12th, 2006, 7:53am » |
Quote Modify
|
Cheers for pic Dave, will have a look after taking daughter to school, did try to get rid of air by parking on incline and running with pressure cap off. Not sure if it worked left it running for 10 mins and blipped throttle when it was up to temp, level in header dropped when blipping and returned to normal after.
|
|
IP Logged |
|
|
|
twinturbo
Full Member
24V's Me game!
Posts: 904
|
|
Re: Suspect air lock
« Reply #16 on: Oct 12th, 2006, 10:12am » |
Quote Modify
|
With the VE OBD you need to select ECT on the DATA tab and then best put it on a DASH guage for easy viewing.
TT
|
|
IP Logged |
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #17 on: Oct 12th, 2006, 12:35pm » |
Quote Modify
|
Had a look at senders, does the right hand one(Single) pull off to leave a thread? seems weird. Left one seems ok. So if r/h one is ok must be looking at a bad airlock somewhere is system, or air getting in somehow. The header tank and pressure cap seem ok so not sure how to find the problem.
|
|
IP Logged |
|
|
|
Simmo
Administrator
I'm an OAP !
Posts: 5508
|
|
Re: Suspect air lock
« Reply #18 on: Oct 12th, 2006, 10:31pm » |
Quote Modify
|
The single one does have a threaded 'stem'.
|
|
IP Logged |
Now I'm an OAP
|
|
|
cossieguy
Full Member
1996 Cosworth Ultima saloon
Posts: 550
|
|
Re: Suspect air lock
« Reply #19 on: Oct 13th, 2006, 6:57am » |
Quote Modify
|
Cheers Simmo, The reading on the dash is 255 when cold which is correct and it does adjust when warming up just not very stable,going to get some tubing and try johhnycabs method for removing air as i'm convinced it is that causing this. Will post how it goes.
Guy
|
|
IP Logged |
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print