Disc300Series

Disc300Series

Active Member
Anyone running veg oil ???? Can you help me out, I'm running my 300tdi on two tank system. When the engines warm I switch to veg and the engine runs and sounds great, but after a while it there's a loud ticking noise from the engine ???

Is my oil getting too warm for the injection pump or is it the lift pump making this noise because it's hot ?!?

Anyone had any problems ?:confused:
 
Disc300Series said:
Anyone running veg oil ???? Can you help me out, I'm running my 300tdi on two tank system. When the engines warm I switch to veg and the engine runs and sounds great, but after a while it there's a loud ticking noise from the engine ???

Is my oil getting too warm for the injection pump or is it the lift pump making this noise because it's hot ?!?

Anyone had any problems ?:confused:
Click to expand...


Hmmmm...... there's not an apparent reason why a change of fuel should cause a noise - unless you are hearing diesel clattering ... ? I don't think veg oil would cause that anyway.

Questions:

Is the noise SPEED sensitive? Once it starts, does it happen all the time from tickover speed up? Or just at a certain speed?

Is the noise LOAD sensitive? Does it only happen with lots of throttle? Ior what?

Your injection pump is a rotary device and it seems unlikely (to me) it would make a ticking noise.

I assume you've checked your tappets (valve clearances) already. They can do this trick when an engine warms up. Check the fan belt too in case it has a crack or is ready to break.

Let me know when you trace it. Sounds interesting!

CharlesY
 
If you have a Viscous coupling fan check it out too!


Best check isto take it off and go for a run.
If that stops the noise ..... QED.

If not replace the fan and keep looking.

CharlesY
 
Ok, I've checked the tappets but the noise is def temp related. It's speed related with the engine anything above say 1000rpm upto 3000rpm. If I drive along dip the clutch and rev the engine it's very noticable and it is a loud ticking noise. I'd almost think it was the tappets from the sound but they're fine had the top off checked and re-checked. My engines only done 80,000 miles and doesn't smoke what so ever, even with this ticking happens. I've ran veg oil previously to this problem but on a single tank mixed 30/70 and with the same heater. The ticking started when I changed to a twin tank system and started to run on pure used veg. If a switch to veg when the engine is not quite warm there's no ticking same if I switch back to diesel and after a couple of minutes the ticking stops...so it must be fuel related??!! Just don't understand it.. You'd almost think the veg oil is getting too hot.
 
It may be just that.

How hot is the fuel being heated?

If it's heated by the water in the radiator I don't think that will be too hot.

I think it is probably diesel CLATTER, and the cure for that is to RETARD the injection pump timing a tiny wee bit.

Hard to say without actually hearing it myself, but it's beginning to look that way. It's easy to sort this.

CharlesY
 
Thanks for you advice.. I'll have to try this out, purhaps satr tthe engine get it really warm until the tapping starts then try adjusting the pump timing a little (making sure I mark it before I start). I don't suppose you'd know which way to turn the pump to retard the timing ??

Just one other thing I'd thought I'd mention is that the Hot Oil now goes through the lift pump since I'm on two tank system. But don't suppose it would be this? You were correct in thinking the Oil gets Heated via a Heat Exchanger using my engine heater water pipes..
 
...Ok just had a Brain wave, I'll try the 30/70 mix then I'll know for sure that it's simply a timing issue with using the 100% veg..:)
 
Disc300Series said:
...Ok just had a Brain wave, I'll try the 30/70 mix then I'll know for sure that it's simply a timing issue with using the 100% veg..:)
Click to expand...

Good plan.

But I think you'll want to do the timing anyway.

It will stop the diesel clatter but it won't affect the performance.

Moving the TOP of the pump TOWARDS the engine will retard it.

I agree - mark it first! Remember first to slacken the 4 injector pipes at the pump end. Make a move of about 2mm - no more.

I reckon one move of about 2mm will make all the difference.

CharlesY
 
I've just bought a disco 300tdi and am about to start running it on svo.Previously I had a pug 406 td which ran perfectly with a VOW2 heater,single tank system and 90% svo 10% diesel.
Any thoughts ?
 
Hi, I started with a VOW 2 and 30/70 mix as found this better for cold starting ( the wife coldn't get "switch the glow plugs on twice" before starting ) which is why 30% diesel. I'm now running two tank system and switch to pure veg when upto temp. The Problem I have is timing the engines a re-con unit put in by landrover when under warrenty, so think the pump hasn't quite been timed correctly. Apart from the diesel knock due to the timing being out it runs great... and the wife doesn't get to drive it anymore!

Otherwise go for it...no tax also unless you use over 2500 litres then again who's to know.:D
 
Finally someone else who has used a VOW2 ! I drove 8000 miles in the other car ,although once a month i ran pure diesel and revved the engine a bit to blow the carbon out.Did you have any problems with it ? I was also thinking of adding a pre heater to compliment the vow.
 
Disc300Series said:
Anyone running veg oil ???? Can you help me out, I'm running my 300tdi on two tank system.
Click to expand...

This engine doesn't need a 2 tank system, it will start no bother all year round on bio (check your glow plugs before the winter sets in). Your starting and stopping on derv at the moment, so I would just toss the derv you would buy into the same tank, or both!
 
discomania said:
This engine doesn't need a 2 tank system, it will start no bother all year round on bio (check your glow plugs before the winter sets in). Your starting and stopping on derv at the moment, so I would just toss the derv you would buy into the same tank, or both!
Click to expand...

He was talking about svo not bio, you are asking for trouble with 100% svo on one tank:rolleyes:
 
iannotts said:
:eek: Nope 90%:eek: Still a little high tho. Only my personal opinion. What about the glyicerine in the oil that causes the problems when cold. Will this 90/10 mix over come this?
Click to expand...

There is no glycerin present in SVO.
It is a by-product in BIO-DIESEL of the transesterification process.

SVO just thickens up when cold, as do most oils.

Heat or the addition of kerosene will help.

CharlesY
 
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