RedAvon
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| posted on 7/8/11 at 11:18 AM |
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Landy engine help please
I think a few folk on here also have Landys so was hoping someone could help.
Had a 1983 series 3 diesel 2.25 for 2 years with 80k on clock and it has been really great.
Last week I was running a couple of short journeys and when I fired up the last time the power and revs were way down accompanied by a knocking noise
which sounds top end. It will just pull away in 4 wheel drive but I was at home anyway so I stopped the engine.
Having given up waiting for it to stop raining here I took the rocker cover off this morning suspecting tappets or push rods but everything seems ok
but I'm not really sure what to look for?
Can anyone point me in the right diection please?
Thanks in advance.
Ian
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Doctor Derek Doctors
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| posted on 7/8/11 at 12:59 PM |
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Possibly the timing has jumped tooth? Could explain the lack of power and revs.
Designer and Supplier of the T89 Designs - Single Seater Locost. Build you own Single Seater Racecar for ~£5k.
Plans and Drawings available, U2U or e-mail for details.
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www.t89.co.uk
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callan@t89.co.uk
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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hillbillyracer
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| posted on 7/8/11 at 01:09 PM |
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Mabye worth checking the fuel for water, I've seen that make a diesel knock when there's nothing mechanical wrong with the engine & it
does little for the power either!
Pistons can crack & the skirt can break up on these old Landy diesels making them rattle but if it's enough to affect the power badly
I'd expect it to miss & run badly especially at low revs too. But I'm going from having worked on a few when I first started work
20ish years ago, I've not had much to do with one in years now!
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plentywahalla
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| posted on 7/8/11 at 02:29 PM |
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Have you checked rocker shaft bolts/studs?
I had a very similar problem. Loss of power and reluctant to rev. All looked fine under the rocker cover when the engine was static. But one of the
threads had stripped and the shaft was bouncing up and down when the engine ran severely limiting the valve opening.
Solution was helicoils.
Engine was TDi but same basic mechanicals apply.
[Edited on 7/8/11 by plentywahalla]
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Peteff
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| posted on 7/8/11 at 02:45 PM |
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Check your fuel filter and pump.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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RedAvon
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| posted on 8/8/11 at 07:57 PM |
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Thanks very much for the replies guys very helpful.
The fuel filter was choked with water and some fine sludge on top. Changed filter and bled but still running very lumpy with knocking although
probably not as bad.
I think it might be a blocked or faulty injector?
Ian
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hillbillyracer
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| posted on 8/8/11 at 10:00 PM |
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Well it's good to find something wrong! If its got a lot of water in the filter then some is likely to have got to the pump, & if it is the
cause of the knocking then it MUST be in the pump & injectors, so it wont go away all that quickly & will take time to clear. I'm
wondering about the best way to get the pump clear so there's no water left to do any damage.
Also the water has to have come from somewhere to get to the filter & pump, so there'll be some in the tank. Check for a rusted through
filler or breather pipe, & the tank itself too. Water thrown up from the rear wheel could get in that way & gradually build up until it got to
a level where it was picked up & goes into the system. Or it may just have been put in with some fuel.
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RedAvon
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| posted on 11/8/11 at 11:16 AM |
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Thanks hillbillyracer,
I think its because i dont use the landy very often in the summer and we've had a lot of warm then cooler wet weather then warm again and the
tank has been condensing - i guess i should have changed the fuel or kept using/topping up before this problem came about.
i'm back at work now and waiting for the rain to stop here!! before having another look - it might be best that i drain the diesel and start
with fresh as its lumpy as hell - but hopefully only the water issue and nothing mechanical.
cheers
Ian
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rusty nuts
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| posted on 11/8/11 at 06:41 PM |
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Could be diesel bug if it has been standing any length of time? Were there any black bits in the filter? Apparently due to diesel now having a large
percentage of Bio fuel in it!
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hillbillyracer
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| posted on 11/8/11 at 07:11 PM |
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quote:
Originally posted by rusty nuts
Could be diesel bug if it has been standing any length of time? Were there any black bits in the filter? Apparently due to diesel now having a large
percentage of Bio fuel in it!
Yes, this is a problem! If it's standing about a lot then it might be this. To be honest I've not seen it on anything running white
diesel, mabye that's due to most diesel cars using enough diesel to keep it fresh enough but on some little used agriculutral stuff running on
red diesel we're seeing a bit of bother.
I'm told the biodeisel is more hydroscopic so will accumulate water over time more than the old stuff & when there's water &
bio-diesel are together a black bacteria grows in it if it's left long enough. Most farmers buy the red diesel in bulk & it can sit in the
tank on the farm for months so it's got time to grow. You can get an additive that will stop it & even return contaminated diesel back to
good.
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RedAvon
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| posted on 15/8/11 at 12:35 PM |
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Thanks for that advice - never thought about the Bio element before but it makes sense.
There was a little sludge on top of the diesel filter - sort of light brown and very fine, so I'm not sure if this was also part of the
symptoms.
The latest is that I've purged the diesel through and the engine is running without knocking now but sounds like it is only firing on 3 or may
be even 2 cylinders - its revving and starting ok but not sounding right at all and no power.
If it was petrol I could whip the leads off in turn but the injector set up isn' as easy - i think I'll need to remove and clean all the
injectors before trying again.
Ian
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