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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
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I don't think my car likes Biodiesel!Views : 1459 Replies : 6Users Viewing This Thread : |
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May 31st, 2011, 14:19 | #1 |
Premier Member
Last Online: Oct 21st, 2023 20:25
Join Date: Dec 2008
Location: Halesowen
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I don't think my car likes Biodiesel!
Just put a tank of Biodiesel in my 760 D24Tic. £111.9/ltr, and I don't think it likes it! (£40 bio + £15.00 pump diesel that was still in the tank)
It doesn't feel too bad once warm - a little down on power though. Thing is, it's a clattery engine anyway (always sounds like one cylinder clattering more than the rest, so guess I need an injector rebuild) but it's noticebly more clattery on Biodiesel! - My timing is set to 0.98mm - is this too advanced? I read somewhere that Biodiesel burns faster so you should retard timing slightly. Cold starting is really not fun! All glowplugs work (recently changed) and it fires fairly easily, but then once running clatters and splutters and the idle hunts around, sometimes stalling. My coldstart doesn't work - I disconnected it because it's siezed up and was permanently stuck on slightly (hot or cold), over-advancing timing to 1.03mm. It still starts fine on diesel without this. No chance with bio. To start on bio I have to jam this open with something to start it and leave it jammed open for 10 seconds - even with the Cold start on it's hunting around, clattering, and filling the street with white/blue smoke. Could this just be that my injectors need rebuilding badly? Timing too advanced? Or other issues? I've heard many people on forums say their D24T's ran smoother and quieter on bio!
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1990 Volvo 760 GLE D24TIC ZF22 - 16psi, more fuel, Monark 293 nozzles, 40mm lower, Bilstein TCs, 24/19 ARBs, full Polybushed front, H&R spacers, 17" Titans. Running Veg oil/petrol mix. Past: 1988 Volvo 740 B230E M46, 1991 Volvo 940 B230FB M47 |
Jun 5th, 2011, 11:34 | #2 |
The Daddy
Last Online: Feb 29th, 2024 15:07
Join Date: May 2010
Location: Manchester
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Hi Ian.
My PERSONAL experiance (have to emphasise this in these cases, or I get lynched by the Volvo Mafia!) is that when I'm running on SVO/Diesel-50/50 mix, mine runs slightly smoother once warm. Possibly a little more lumpy from cold, with a touch more white smoke but that's all, it's fine after about 30 seconds-2 minutes depending on how cold it is. I always gathered that it was more lumpy in the cold as it's harder to pump, being slightly thicker than pump diesel, my idle also drops by about 50-or-so RPM, again, I presumed for the same reason. I ran a 2.8 td Shogun on the same for years, with the same results. One thing though, try changing your fuel filter, as Bio-Derv/veg oils tend to drag all of the carp out of your tank and fuel lines. Would make a certain amount of sence, if it's being starved of fuel then it will be a b1tch to start. HTH, Steve
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XC90 V8 Exec, C70 2.4T Convertible, S70 T5 CD, 850 TDI, 2 x Escort vans and a 2.8i Capri. Clearout has begun, but must continue! |
Jun 5th, 2011, 17:26 | #3 |
Brit in Germany
Last Online: Jun 19th, 2024 16:10
Join Date: Jan 2011
Location: Bremen
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Whar %age is the bio-diesel? Or better said, to what degree is it bio?
If you simply fill plant oil into the tank, then you'll have problems running it. Bio diesel is a mix between both which can - depending on the %age - mean that the engine will need a different setting. For example, the bio diesel/plant oil/vegi oil has a different combustion point and can even burn slower than normal diesel. Thrus, reving it high when cold isn't clever. A friend killed an injection pump in winter with chip fat... Although he would tank anything he could get his fingers on, like lard, normal oil, engine oil, used chip fat and the odd chunk of butter/margarine The injection time and amount will need to be trimmed, at the same time, an addition in the glow plug duration wouldn't go a miss and - as it is cheaper - a little increase in power might not go a miss
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The Best Nation Is Imagination 2010 V70 (Type 135) D5 (D5244T10) Automatic (TF-80SC) |
Jun 5th, 2011, 20:24 | #4 |
Premier Member
Last Online: Oct 21st, 2023 20:25
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Location: Halesowen
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Well, i think it is B100 from the place i filled from. I did have about £15-20 real diesel in the tank aswell tho!
I think my injectors probably need a rebuild - it clatters plenty even on normal diesel! If they do its not going to help it run well on bio/plant oil i suppose! Ive read bio burns faster so timing should be retarded. Ive alwo read svo/wvo burns slower needing it advancing. But surely bio is made of wvo?
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1990 Volvo 760 GLE D24TIC ZF22 - 16psi, more fuel, Monark 293 nozzles, 40mm lower, Bilstein TCs, 24/19 ARBs, full Polybushed front, H&R spacers, 17" Titans. Running Veg oil/petrol mix. Past: 1988 Volvo 740 B230E M46, 1991 Volvo 940 B230FB M47 |
Jun 12th, 2011, 21:31 | #5 |
Brit in Germany
Last Online: Jun 19th, 2024 16:10
Join Date: Jan 2011
Location: Bremen
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The most common form of biodiesel is rapeseed methyl ester (here shortend as RME) which is that yellow stuff on the fields. I don't know what you mean with svo or wvo...
If the injectors are worn or the timing is wrong (injection amount etc.) then it won't run right. In order to set up right for biodiesel (pure 100% RME) you need to end up with "stage 0". Means: engine MUST be set up correctly. Only then, and really only then, you can set the engine up correctly
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The Best Nation Is Imagination 2010 V70 (Type 135) D5 (D5244T10) Automatic (TF-80SC) |
Jun 12th, 2011, 23:40 | #6 |
VOC Member
Last Online: Mar 18th, 2024 12:17
Join Date: Jul 2008
Location: Henley on Thames
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I sometimes run my (low mileage, fairly quiet) D24Tic on svo, pure rapeseed oil, great for cleaning engines, engines that have been run on this are amazingly clean when stripped down. My D24Tic can sound a little clattery when started up on rapeseed, I give it more than one go with the glow-plugs for this reason, to thin it down a bit. It's also a bit down on power but that is normal from all I have read. I also used to run my old very low compression D24Tic on straight rapeseed sometimes, again a bit noisier on start up and a bit down on power. I also notice I get slightly less mpg
Can't say I've ever had my idle speed drop though The reason svo kills the pump eventually is that it dissolves the gaskets, if you're going to run on it a lot you must replace them with ones made of Viton, ditto the fuel lines I can't remember what it is but I did read up lately from quite a lot of different sources that they're now putting something in biodiesel which is not very engine-friendly and which has convinced me to avoid it like the plague! So it might be better if you make your own bio, at least you know what's in it! A garage manager did tell me recently that they are now putting a small percentage on rapeseed in normal diesel, dont know if this is true or not
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[IMG]Volvo2 by Strider'swoman, on Flickr[/IMG] Current '96 945 2.3 lpt - Aurigas, tailgate spoiler, sports grille, lpg fuelled Previous '88 764 TD, '92 945 TD, '88 745, '81 244 DL |
Jun 14th, 2011, 22:59 | #7 | |
The Daddy
Last Online: Feb 29th, 2024 15:07
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Quote:
Whether it's rapeseed or not I don't know, but I've been told on more than 1 occasion that up to 10% of pump diesel is vegetable oil. Fill a glass with pump diesel now and hold it up to the light, it's got a golden tinge... Never used to be like that!! Steve
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XC90 V8 Exec, C70 2.4T Convertible, S70 T5 CD, 850 TDI, 2 x Escort vans and a 2.8i Capri. Clearout has begun, but must continue! |
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