who running on svo cooking oil?

[kwondo]

Thanks Geoff for the chat will keep you informed how it goes over the weekend,

cheers mate,

[geoffdown]

Originally Posted by zippy656

If this is happening is there any way to revers the gumming up??

i was reading else where water injected will help stop this and clean it out to.

or is twin tank the best way to go?


oh yea, PICS on the twin tank system please..

hi zippy some pics 4u
http://s1190.photobucket.com/albums/z441/geoffdown/

[geoffdown]

Originally Posted by kwondo

Thanks Geoff for the chat will keep you informed how it goes over the weekend,

cheers mate,

no probs good luck you should be fine

[Deleted account DD]

Originally Posted by geoffdown

and the gumming does not happen in the engine oil it happens as the un atomised veg oil hit the cylinder walls when cold which will always happen in a single tank system but not in a twin tank system here is the info from the veg site about ring gumming

Not entirely correct.

ALL engines end up with gumming of one form or another. That seems to be a point being missed here.

[geoffdown]

Originally Posted by daved

Not entirely correct.

ALL engines end up with gumming of one form or another. That seems to be a point being missed here.

sorry i no that gumming will happen but what i was trying to say is that in twin tank the veg oil will never be cold sorry didnt word it correctly but single tank on vegie will gum more than twin tank vegie .think thats better put was never any good at english as u can tell.

[Fez_uk]

do you run separate fuel feeds from the engine bay (supply and return) to the 2nd tank?

[Deleted account DD]

If you google "what causes piston ring gumming up" you will find nearly 2 million related links.

Out of those I read (about 2 pages worth) not one was related to svo.

Im not saying in any way that svo wont cause gumming, what i am saying is because that one article has been unearthed it doesnt mean svo is the gumming anti christ of the automotive world.

The last engine i dismantled and had cruddy rings was an 1800 cvh ford engine ie petrol. If engine oil doesnt contribute to gumming up where had it come from on that? as previously mentioned oil does make its way into the upper part of the piston bore on any car.

Diesel isnt warm when it first kicks off, nor is petrol. Why is svo any worse ??????

Its more likely that the lack of detergents in svo contribute to accelerated gumming up.

All of those points are very very very basic engine factors.

[Deleted account DD]

Originally Posted by geoffdown

sorry i no that gumming will happen but what i was trying to say is that in twin tank the veg oil will never be cold sorry didnt word it correctly but single tank on vegie will gum more than twin tank vegie .think thats better put was never any good at english as u can tell.

no problem with your terminology Im questioning some of your theory

any unburnt cold fuel from pigs piss to avtur has the potential to cause problems.

If you use an electric preheater in conjunction with a water heat exchanger you will have warmer svo from kick off.

Therefore no difference to the viscosity and atomised fuel going through the injectors be it cold normal diesel or warmed svo.

Its long been recognised that the lack of lube or detergent in svo can POTENTIALLY cause problems.

[Deleted account DD]

Originally Posted by Fez_uk

do you run separate fuel feeds from the engine bay (supply and return) to the 2nd tank?

No need to run seperate feeds. So long as the switch. Solenoid or manual works! One i worked on had a feed from the diesel tank and the svo tank at the rear to a solenoid then forward from there on the existing line.

Didnt even consider the return , I presume it went into the old big tank. I wouldnt have thought it would upset anything to leave it standard

[geoffdown]

Originally Posted by Fez_uk

do you run separate fuel feeds from the engine bay (supply and return) to the 2nd tank?

no just feed

[geoffdown]

Originally Posted by daved

no problem with your terminology Im questioning some of your theory

any unburnt cold fuel from pigs piss to avtur has the potential to cause problems.

If you use an electric preheater in conjunction with a water heat exchanger you will have warmer svo from kick off.

Therefore no difference to the viscosity and atomised fuel going through the injectors be it cold normal diesel or warmed svo.

Its long been recognised that the lack of lube or detergent in svo can POTENTIALLY cause problems.

yes gumming come when fuel is not atomised correctly if the petrol engine is not running how it should do that will cause gumming as will if the diesel is ot atomised due to poor injector but svo is thicker than diesel so thats y u run on diesel first the oil when warm ,with a big heat exchange and electric in line heater u will still have cold svo in the ip and most importantely the injectors so more risk of gumming when burning cold hard to atomised svo compared to cold easier to atomised diesel that to me seams like good theroy to me but thats me making it as safe as i can for my truck i also dont like the ip straining on cold thick svo when starting but every1 to their own.

[Deleted account DD]

This article that seems to have caused such a flap http://www.vegetableoildiesel.co.uk/...d.php?tid=8020
is articulately written by somone who clearly has a decent understanding though it lapses almost into a business case for a twin tank system.

It is flawed as his opinions take no account or explain why all engines get the dreaded gum and the practical element is based on one engine strip. The rest is theoretical.

The parameters of that engine were not discussed. Had the thermostat been knackered and it had ran at a low temp? how many miles? what had it been ran on prior? what engine lube had been in? how often had it been changed?

I reckon, and its why i used millers and 2 stroke (which still brought it in cheaper than derv) , its the lack of detergents svo that could cause the problems, but then you know that when you lob it in.

Even so theres no hard comparative evidence to support that

[(RIP) PLANK]

I think the best argument in this has been from Daved, and you know we don't always see eye to eye. Did i read somewhere that this problem is associated with the use of synthetic and semi synthetic engine oils, and is less of an issue with mineral oils?

[geoffdown]

Originally Posted by PLANK

I think the best argument in this has been from Daved, and you know we don't always see eye to eye. Did i read somewhere that this problem is associated with the use of synthetic and semi synthetic engine oils, and is less of an issue with mineral oils?

i am not sure if hes 100% correct i will keep using my system as i know it releaves the strain on ip when starting with cold svo in the system but you forget i run on pure diesel every morning so i do get the deterants from that cleaning things out as some people have said before else where on here with single tank running 100% svo u still have to start with cold svo in the ip and injectors but not with a twin tank i am ot selling anything so not promoting twin tank i will just be here if peeps need any help on the matter i bought all my thing from diff people of ebay and found the bits cheaper thats all

[(RIP) PLANK]

Originally Posted by geoffdown

i am not sure if hes 100% correct i will keep using my system as i know it releaves the strain on ip when starting with cold svo in the system but you forget i run on pure diesel every morning so i do get the deterants from that cleaning things out as some people have said before else where on here with single tank running 100% svo u still have to start with cold svo in the ip and injectors but not with a twin tank i am ot selling anything so not promoting twin tank i will just be here if peeps need any help on the matter i bought all my thing from diff people of ebay and found the bits cheaper thats all

I wasn't disregarding your point of view, just agreeing with the 'all engines gum up eventually' bit. I am sure it is to a greater or lesser degree depending on how you go about it