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slight engine rattle when cold?
Posted: Wed Sep 15, 2010 8:45 am
by chipvan
Just noticed (but cant be sure if its always done it or not)
That when the engine is cold it makes more of a rattle,is this normal for bongos/diesels??
Thanks jez
Re: slight engine rattle when cold?
Posted: Wed Sep 15, 2010 11:57 am
by dandywarhol
Normal for most injuns until the internals heat up and expand a bit - also more diesel "knock" until the air is properly heated.
Re: slight engine rattle when cold?
Posted: Wed Sep 15, 2010 4:17 pm
by David Edwards
yea can be a bit disconcerting, can help to lessen it by adding some oil treatment, like the stuff with teflon to help with sound, smoke etc, I have used it often with diesel engines.
Re: slight engine rattle when cold?
Posted: Wed Sep 15, 2010 7:16 pm
by gmaczbongo
Usually worse with the veggie oil as well.
Re: slight engine rattle when cold?
Posted: Wed Sep 15, 2010 8:17 pm
by chipvan
Phew thanks guys...yer seems better when ive done a real long run on diesel and no veg...
Ive always been told that veg makes it quietermthats why its made me worry...
Re: slight engine rattle when cold?
Posted: Wed Sep 15, 2010 9:55 pm
by dandywarhol
Veg has a lower calorific value than diesel so won't burn as well when warming up, so would tend to knock a bit more til hot.
Re: slight engine rattle when cold?
Posted: Thu Sep 16, 2010 6:02 pm
by cheffy34
I must stop givin the wife diesel in her food then
Re: slight engine rattle when cold?
Posted: Fri Sep 17, 2010 12:03 am
by The Great Pretender
Twin tanked, looped return on veg?
Re: slight engine rattle when cold?
Posted: Tue Sep 21, 2010 9:01 am
by chipvan
twin tanked,looped veg and diesel.and always flush down for 1 min as well...
Re: slight engine rattle when cold?
Posted: Wed Sep 22, 2010 10:39 am
by bigdaddycain
I generally allow the engine to tickover for a couple of minutes before i set off chipvan, this seems to help a bit. (if convenient of course)
Re: slight engine rattle when cold?
Posted: Wed Sep 22, 2010 9:54 pm
by The Great Pretender
chipvan wrote:twin tanked,looped veg and diesel.and always flush down for 1 min as well...
Looped systems can have a problem with air. As yours doesn't purge back to tank could settled air be part of the problem on start up?
Re: slight engine rattle when cold?
Posted: Thu Sep 23, 2010 11:35 am
by francophile1947
bigdaddycain wrote:I generally allow the engine to tickover for a couple of minutes before i set off chipvan, this seems to help a bit. (if convenient of course)
Same here, especially when it's cold
Re: slight engine rattle when cold?
Posted: Tue Oct 12, 2010 8:47 am
by chipvan
tgp was right again...just when i thought i knew everything about my set up as well!!
It seems like it was air on diesel side,i found it out by accident,my wife ran out of diesel and wonderd why the bongo didnt drive well.after re filling start up tank i pumped up the fuel lines using a foot pump with gauge to see if any air or fuel came out,and bingo found a leak on a connection,it was prob where air was sucking in...
I used to have the purge timer set to 60 sec b4 shut down as the start up was a bit lumpy sometimes,i thought this was down to veg,but alis it was air,and with the air ingress must have made it worse with longer flush times.
The van now starts fantastic with a 30 sec flush and a little drive after flushing to mix diesel and any veg left in there,and quiet and smooth even from cold!!!
Well happy....and saving diesel!!!
cheers guys