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Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 2:41 pm
by manwithsound
Hi there,

Bob, (my bongo) has decided to start knocking (like a piston has gone) but, i've had this happen before on a van and black smoke billowed out the back and i lost power. I still have all the pull and no smoke out the back (noy even grey/blue on start up)

I'm massively confused, any ideas anyone?

Recently had full service too !

Cheers J

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 3:06 pm
by Gasy
What did it have done on full service
I'd take it back
What engine is it

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 3:25 pm
by manwithsound
Gasy wrote:What did it have done on full service
I'd take it back
What engine is it
Just new oil, oil filter, new air filter, that's it

2.5 diesel 1996

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 3:48 pm
by Gasy
That shouldn't of messed any thing up
unless oil to thin
what did they put in
have you checked oil level on dip stick

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 5:31 pm
by manwithsound
Gasy wrote:That shouldn't of messed any thing up
unless oil to thin
what did they put in
have you checked oil level on dip stick
Yep checked all that, oil was coolio

I've uploaded a video to you tube

http://youtu.be/lHqQfu7jhEo

i'm absolutely stumped!?

Cheers J

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 6:39 pm
by Bob
Possibly a Red Herring, but could it have got some wrong fuel in it?

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 8:14 pm
by manwithsound
[quote="Bob"]Possibly a Red Herring, but could it have got some wrong fuel in it?[/

defo a good point to make , but she's full of diesel for sure

Cheers

J

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 8:55 pm
by Bob
Didn't want to send you the wrong way, but all avenues...

Let's hope someone has some more ideas. [-o<

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Fri Apr 24, 2015 10:56 pm
by Northern Bongolow
its a bit of a shot but. is the oil warning light on or pulsing,
what brand of oil filter was fitted.???. they have a pressure relief valve inside, if the filter gets blocked or is faulty ive heard them bang quite loud , admittedly, not this loud but check its not just a duff filter, they can get crushed when a muppet uses the wrong strap to tighten em on.

after that i would pull the rocker cover off and check the valves/shaft is all fine, they are known to break rockers, and the shafts can break in pieces, usually under the bearings so you cannot see the break but some of the valves/rockers dont move. ive seen 2 run really well with broken shafts.

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Sat Apr 25, 2015 10:48 am
by ConAndChar
Sounds like mine :( I'll let you know what the garage says is wrong with mine... if and when I ever get a diagnosis :roll:

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Thu Apr 30, 2015 6:34 pm
by manwithsound
ConAndChar wrote:Sounds like mine :( I'll let you know what the garage says is wrong with mine... if and when I ever get a diagnosis :roll:
That would be great, please let me know

Thanks J

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Thu Apr 30, 2015 6:38 pm
by ConAndChar
If you take the air filter lid off is there a popping noise? One guy who looked at mine diagnosed a dropped valve when he heard this noise, but I'm still waiting on the garage to actually get their finger out and strip my engine down to find out for sure :cry:

Re: Engine Knocking (like piston gone) but no smoke?

Posted: Thu Apr 30, 2015 10:32 pm
by manwithsound
ConAndChar wrote:If you take the air filter lid off is there a popping noise? One guy who looked at mine diagnosed a dropped valve when he heard this noise, but I'm still waiting on the garage to actually get their finger out and strip my engine down to find out for sure :cry:
Oh dear!!

I got the pop !!

Gutted !

Anyone wanna buy a Bongo with a Duffed engine !! LOL