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Post Number: 1
|Posted on Saturday, 22 December, 2018 - 12:56 am:
Hi , i bought a rrSS 1970 with 54000 miles ....car was store like 20 years we work on the car and spend big money ( brake + suspension +tune up ....) motor start up and running pretty good ! problem is idling no smoke but if you push on gas kind of gray smoke appears ...coolant is ok ....oil is ok ....my guest i pretend could be humidity in mufllers there 4 of them ! But not sure ....or could be the flame trap i don't know ...can someone can help me with advice with that ? Sorry with the english cause i m french ...thank you in advance Panel49. SRH7576
Post Number: 2712
|Posted on Saturday, 22 December, 2018 - 02:14 am:
Not that I believe this is the cause, but if you have not cleaned your flame trap definitely take the time to do so. See this topic of mine: Flame Trap on Oil Filler - The Need to Clean It
Also, on LRK37110, when I was first trying to revive her from a very long winter's nap, I had a great deal of trouble keeping her running at idle and if one held down the accelerator to keep her running you'd get a cloud of "thin white and smelly smoke" filling the garage. It turned out that the anti-dieseling solenoid was stuck partially open, wreaking havoc. Definitely have a look at your anti-dieseling (anti-run-on) and weakener solenoids. They may be stuck. If so, they can generally be un-stuck with WD-40 or similar, applied in small doses over a couple of days, and using a manually applied 12V source to do quick activations until they loosen up. I've had to do this on several cars now and after fixed they've continued working as they should for years afterward.
Post Number: 3
|Posted on Saturday, 22 December, 2018 - 02:59 am:
Where is that anti dieseling thing ?
Post Number: 4
|Posted on Saturday, 22 December, 2018 - 03:24 am:
Where is that anti dieseling thing ? When i start the engine good running idle no vibration no sound run very quiet but if you push down the pedal there is a big cloud of gray smoke and smelly bad ( not like burn oil ) Wonder wath could be no idea....idling no noticable smoke just if you push on gas !
Post Number: 2715
|Posted on Saturday, 22 December, 2018 - 05:20 am:
First, you are going to need to have a copy of the full Workshop Manual for your car if you intend to be a DIY maintainer. Though the whole thing is available on the RROC-Australia Post-War Technical Library, specifically the SY Motorcars Section, you would have to download it section by section.
I did this long ago for the SY1 series cars and the SY2 series cars, and anyone who wants the entire Workshop Manual for either, all in one fell swoop, can download them from:
TSD2476 Silver Shadow and Bentley T "One Series" Workshop Manual - OCR Processed
TSD4200 Silver Shadow II and Bentley T2 Workshop Manual - OCR Processed
Both are OCR processed so they are completely searchable from within the PDF reader of your choice and by Windows Search itself if you index the contents of PDF files.
See Chapter U - Emission Control System, Figure U24, IN THE SY2 SERIES WORKSHOP MANUAL for the best illustrations of these solenoids. They look just the same in the SY1s, but the photos used in the SY1 workshop manual are much darker and harder to distinguish the individual items being referenced.
Post Number: 591
|Posted on Saturday, 22 December, 2018 - 01:01 pm:
Denis, how old is the fuel in the tank ?, I f over 3 months, this could be the problem.
gordon le feuvre
Post Number: 283
|Posted on Saturday, 22 December, 2018 - 07:28 pm:
Really need to know if car UK spec, or Australian/Japan emissions fitted. Cannot tell from early chassis numbers. Pic of engine bay is good. The anti-dieseling solenoid stops engine "running on"after switching ignition off. What used to happen, as mixture made weaker for emissions, when switched off engine would still pull in fuel mixture causing partial effect of a diesel engine making it try to run on. The anti diesel solenoid opened the intake to clean air to negate the effect of fuel vapour being drawn in.
As Mark says, how old is fuel.If all levels ok I would give car at least 25 mile run, to warm everything, then let go cold and look at levels. Don't forget coolant does drop a little bit after running!It just must not keep dropping.
Robert J. Sprauer
Post Number: 92
|Posted on Saturday, 22 December, 2018 - 10:43 pm:
Does the car shift properly when driving? A defective vacuum modulator on the gearbox will allow seepage of transmission fluid into the intake since it is vacuum controlled.
Post Number: 2022
|Posted on Sunday, 23 December, 2018 - 06:45 am:
Give a good run and if it clears after I would suspect the valve stem seals leaking slightly after the engine left stationary.
When hot let the engine over run on a long downward hill then give it some stick and look for a slight smoke haze on acceleration.
Omar M. Shams
Post Number: 1768
|Posted on Monday, 24 December, 2018 - 05:56 am:
I agree with Patrick.
The valve seals on these old cars were made out of rope and they dont make the best seals when they dry up following a long slumber.