V4 engine sounds like traction engine

[bigwig02]

CAN any one help me started my v4 engine when warm.sounded has something had broken and sounded like a traction engine,exhaust a new one and still conected thaught alternater had broken but allright checked water pump allright. engine ticks over revs up but sounds like a traction engine any clues to what has happened. does any one know what it might be thank you for genuine replys has this his my motorbility motor a v4 transit motorhome,thank you bigwig

[wardy-uk]

No idear whats wrong with it but i know of a V4 in Seaham for £50 if needs be. Plus you could pick up that door from me if you still want it

[bigwig02]

THANK YOU but have no motor now till find out what his wrong,confused me in what has happened,thank you

[imustloverust]

Heres a shot in the dark!
I recently jumped into my mk2 and started her up to hear a very disturbing noise. The engine revved up and idled as usual. I opened the bonnet a looked down at the starter. It was still engaged with the fly wheel. I took a 2x2 piece of timber and beat it to get it to disengage.
The starter was dodgey for some time leading up to that.

Failing that:
Did you try to drive it? Any loss of power?

[bigwig02]

THANKS for that i was just thinking if it was the starter i have had trouble before with starters will look tomorrow,i did drive it home and no loss of refs it just sounds rough yet new exhaust fitted thank you

[OzzyVan]

Is it hissing?

Mine did that when a valve went...

JD

[bigwig02]

NO its not hissing no loss of power just sounds like has no exhaust on,or something broken in engine and sounds like a traction engine best way to describe it in running.it revs up and ticks over but noisy that his why i am frustrated in not knowing what has gone wrong

[FredTransit]

Check the exhaust manifold bolts. It may not be obvious at first glance, but one may be loose or missing.

[baconsdozen]

We need to more about the noise.Is it a knock,does it get louder when pulling,any smoke anywhere etc etc.
revving an engine wthats noisy is a bit dodgy,if its something getting ready to 'let go' better it does it at low revs than high ones whatever it is.

[Squirrel]

Yip Fred, sounds like manifold - either loose bolts or gasket has gone.

[bigwig02]

NO the manifold bolts are tight the exhaust his new,the engine sounds has no exhaust on sounds terrible had a garage out they not sure even coming tommorrow for the motorhome.has i said started her up from warm grinding noise bang has something snapped off then engine running noisley ,yet drove home but noisly like no exhaust. will let you know when garage finds the problem thank you to you all.

[FredTransit]

Think about it. If the exhaust is getting directly about the engine at the manifold, it will sound very loud. If it's coming out of the head it would barely run.

[baconsdozen]

Should be easy to find an exhaust leak.With the engine hot and running on a fast tickover trickle light oil in the carb and look for blue smoke where it shouldn't be.

[bigwig02]

THANK YOU to you all found the problem valve distorted on drivers side on head then found it had snapped on to piston no damage there thank god or lucky,fitted new valve running like a dream now thank you for your help bigwig

[FredTransit]

Glad you are sorted. I have just realised I have mistaken your description of traction engine for tractor, which would be a loud exhaust noise. It's really hard to work out a noise without hearing it!