Dilambdaman
Permanent resident
Posts: 1380
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« Reply #75 on: 23 June, 2009, 10:18:02 PM » |
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Well, another 8 hours, this time with son Jonathan and still no nearer solving the problem. Investigated inside of the bell housing with Jonathan's Fire Brigade Search and Rescue fibre optic camera, amazing what you can see! Sump off, faced off the heads of the flywheel bolts as they seemed to be running very close to the rear of the block and checked conrod to cylinder liner clearance. Ran the engine having removed push rods on each cylinder to see if valves were the problem. Head off, camshaft out but all looked fine.
Re-assemble now and run again. Think that I'll trailer her to the AGM so that you can all have a listen! Bring your overalls!
Robin.
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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JohnMillham
Lapsed
Permanent resident
Posts: 1045
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« Reply #76 on: 24 June, 2009, 07:29:22 AM » |
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I'll bring my stethoscope - but I expect you have tried one already! Regards, John
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DavidLaver
Permanent resident
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« Reply #77 on: 24 June, 2009, 08:01:55 AM » |
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The other thing to bring is the ever longer list of what you have tried. I can imagine you standing there all day saying "we checked that and..."
David
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David Laver, Lewisham.
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ColinMarr
Permanent resident
Posts: 1660
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« Reply #78 on: 24 June, 2009, 08:03:28 AM » |
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Robin,
Just to encourage you. It looked like this (see below) two and a half years ago, and I didn’t hear any clonks then!
Colin
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Dilambdaman
Permanent resident
Posts: 1380
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« Reply #79 on: 27 June, 2009, 10:14:14 PM » |
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Thanks John, David and Colin for the encouragement. David Mead (Augusta) came over for much of the day but sadly went away as baffled as I am. On the bright side, excellent oil pressure following attention to the relief valve.  Robin. |
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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JohnMillham
Lapsed
Permanent resident
Posts: 1045
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« Reply #80 on: 28 June, 2009, 10:06:46 AM » |
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Was the relief valve spring too weak? Or was the valve not seating properly? Did you check the pressure with hot oil? I ask because I'm a bit baffled about the pressure on my Augusta. When cold, it's a bit too high. This is not such a bad thing as it encourages me to warm the motor up slowly. But I tried a weaker spring in the top relief valve, only to find that it effected the pressure when the oil was hot as well, resulting in about 10 psi less pressure at cruising speeds. I have reverted to the old spring and remain confused!Regards, John
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Dilambdaman
Permanent resident
Posts: 1380
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« Reply #81 on: 28 June, 2009, 09:58:02 PM » |
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John,
I'm not sure if the relief valve is the same on the Augusta as on the Dilambda which is a piston in a sleeve with a conical seat held in place by a spring. There appears to be no adjustment other than the strength of spring used.
Morris Parry told me that he has had problems with the similar set up on his Augusta and that I should lap the seat in using valve grinding paste. I fitted a long bolt through the piston which allowed me to use an electric drill to do the lapping.
The piston also has a small hole across it which can get blocked or indeed some people deliberately block it off in the mistaken belief that it will increase oil pressure. The presence of the hole defies logic but is necessary.
I'm now getting 3 on the gauge when cold and between 1 & 2 when hot.
Robin.
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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Dilambdaman
Permanent resident
Posts: 1380
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« Reply #82 on: 03 July, 2009, 10:27:34 PM » |
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Addendum to my last post re the oil pressure relief valve.
In case anyone thinks that Morris was encouraging me to introduce grinding paste into the engine block let me explain.
In many vehicles the piston of the pressure relief valve seats directly into the block - not so the Dilambda. The piston runs in a cylinder both of which come out of the block. So, I was able to grind the piston seat into the cylinder whilst holding it in my hand well away from the engine. Careful and thorough washing away of the paste is easy before re-assembly.
Robin.
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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Dilambdaman
Permanent resident
Posts: 1380
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« Reply #83 on: 03 July, 2009, 10:38:49 PM » |
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Progress at last - but don't get too excited!
Managed to get the Dilambda to the MOT garage and was rewarded with a shiny new certificate.
That's the good news, the bad is that the engine malady still persists, if anything, worse than ever. Driving the car has revealed that one can to some extent control the frequency and intensity of the noise and that it does seem more random than at first thought. It almost seems that there is something loose inside.
So, trailer is hired and hope to see you all at the AGM when a substantial reward is on offer for the correct diagnosis!
Today's very short drive served to remind me of how very much I'm missing using her.
Robin.
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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chugga boom
Non-LMC Seller
Permanent resident
Posts: 1754
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« Reply #84 on: 03 July, 2009, 11:07:57 PM » |
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look forward to your visit robin,
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1935 augusta lusso (chugga)
1935 belna saloon
1935 augusta lusso
1938 ardenne
1939 aprilia lusso
1958 appia s2
1963 appia s3
195? appia camioncino
1972 fulvia 1600HF
1976 fulvia coupe
194? ardea SUV "THE BEAST!!!"
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fay66
Permanent resident
Posts: 6231
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« Reply #85 on: 03 July, 2009, 11:57:04 PM » |
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Will I need my ear trumpet  Brian 8227  |
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Own 1966 Fulvia 2C Berlina since 1997, back on road 11-1999.Known as "Fay"
2006 Renault Megane 1 5 Dci Sports Tourer
Dedra Technical Adviser
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Dilambdaman
Permanent resident
Posts: 1380
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« Reply #86 on: 05 July, 2009, 11:14:03 PM » |
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Bakelite cover for the dip switch.
Picture shows the broken cover that I have. The missing part has a knurled knob on the opposite side to the one shown.
Long shot I know! Or perhaps someone knows how I can fabricate the missing part.
Robin.
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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Dilambdaman
Permanent resident
Posts: 1380
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« Reply #87 on: 06 July, 2009, 10:00:05 PM » |
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Will I need my ear trumpet Brian 8227 Ear plugs more like! Robin. |
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Robin Lacey 3222
1932 Dilambda
1992 Y10 GTie
2012 Delta Mk3
2013 Ypsilon 846
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sparehead3
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« Reply #88 on: 07 July, 2009, 08:58:37 AM » |
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This will be a good test as to who is reading the Forum then ... check out the size of the crowd round the car |
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Regards,
Steve Pilgrim
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DavidLaver
Permanent resident
Posts: 4387
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« Reply #89 on: 07 July, 2009, 10:09:35 AM » |
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That car with the bonnet open would pull a crowd ANYWHERE.
David
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David Laver, Lewisham.
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