owelly
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| posted on 18/11/07 at 11:29 AM |
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O/T Cavalier TD starting issues....
My chum has just phoned me because his 93 1.7TD Cav has been tricky to start on a morning and this morning he had to tow it the length of his street
to get it to start. When the car does start, it billows out black smoke for a few hundred yards. The car seems to start OK for the rest of the day.
He's had new heater plugs fitted and a new air filter.
I seem to recall these engines having issues with EGR valves but I can't remember if they are easy to get to!!
What else could it be? I'm off to have a look at it soon and as it's pouring with rain, I'd like to know how to fix it in a few
seconds without having to open the bonnet. Or get out of my car.....
Cheers folks!
[Edited on 18/11/07 by owelly]
http://www.ppcmag.co.uk
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graememk
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| posted on 18/11/07 at 11:46 AM |
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egr or air getting into fiel lines check returs from injectors and that the injectors are in tight
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jollygreengiant
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| posted on 18/11/07 at 11:51 AM |
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If it's the Isuzu engine, these have a known problem with the valves pocketing into the head and closing up the valve clearances (vauxhall
recommend doing the valve clearances on these engine every 20K). If it is the Isuzu engine my first step would be to get the shims replaced with shims
of the correct thickness (that bit is usually the hard bit because the valves can pocket that much that you have no or negative valve clearance so
that removal and measuring of the old ones is only the first of several steps and the shims aren't cheap) and thereby the valve clearances
reset.
The symptoms you describe sound like it is the Isuzu engine problem.
Hope this helps.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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Danozeman
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| posted on 18/11/07 at 12:02 PM |
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I agree with jolly green. If its izuzu check this. Its very common on higher mileage ones.
Failing that are the glow plugs actually coming?? It might be the glow plug relay/timer not actually turning them on. Put a volt meter on them.
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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owelly
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| posted on 18/11/07 at 12:03 PM |
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Where will I find the EGR? That seems to be the cheapest thing to try.....
http://www.ppcmag.co.uk
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owelly
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| posted on 18/11/07 at 12:30 PM |
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And more importantly, why would a knackered EGR effect the way the engine started as derv engines only suck air not air/fuel?
http://www.ppcmag.co.uk
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froggy
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| posted on 18/11/07 at 02:00 PM |
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id eliminate the glow plugs first feed them direct from the battery
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owelly
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| posted on 18/11/07 at 02:14 PM |
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But feeding them with 12v would pop them as they are only 9(ish)volts.......
http://www.ppcmag.co.uk
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jollygreengiant
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| posted on 18/11/07 at 04:43 PM |
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quote:
Originally posted by owelly
But feeding them with 12v would pop them as they are only 9(ish)volts.......
No they take 12 volts quite comfortably.
Oh and the cheapest option is the use of a feeler blade to check the valve clearances.
Cost = Nothing if I am wrong.
and correct diagnosis if I am right.
Nothing is quite as cheap as doing the correct job first time.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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owelly
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| posted on 19/11/07 at 10:41 AM |
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I concur.....
Cyl no.1 has no clearance on the ex valve and the others have very little!
Still bemused by the EGR valve. I can't see one and don't see how a dodgy one would effect a derv engine. Not that it matters anymore.....
http://www.ppcmag.co.uk
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MikeRJ
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| posted on 19/11/07 at 02:50 PM |
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A duff EGR is unlikely to affect starting, but it can cause significant performance loss when running.
Starting problems in diesels are most always down to glow plugs, compression, pump timing or air in fuel.
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jollygreengiant
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| posted on 19/11/07 at 07:36 PM |
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quote:
Originally posted by owelly
I concur.....
Cyl no.1 has no clearance on the ex valve and the others have very little!
Still bemused by the EGR valve. I can't see one and don't see how a dodgy one would effect a derv engine. Not that it matters anymore.....
Shims are dead easy to change, you just need to be able to work out what they need to be exchanged for. The shims that come out 'should'
have the thickness marked on them. Subtract the clearance you need from the marked thickness (or measured) and you should be in the right area. refit
new shim and remeasure then adjust as required. Your best bet is to find a friendly Vauxhall mechanic who will possibly have a good selection of shims
to hand.
To remove shims push down on either side of the shim on the lips of the bucket walls and whip old shim out with magnet. Refit in reverse procedure.
Hope this helps.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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Danozeman
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| posted on 20/11/07 at 01:17 PM |
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The egr wont affect the starting. It just wont rev when it is started and smoke like a goodun.
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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