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        General >> Problems >> scorpio 2.5 tdi
        
(Message started by: python9 on Apr 8^th, 2008, 2:30pm)

Title: scorpio 2.5 tdi
Post by python9 on Apr 8^th, 2008, 2:30pm

i have a problem with my scorpio
i have just replaced the head gaskets and put the whole thing back together the car starts and idles
but when i drive it she is very lumpy and smokes a lot she was okay before the head gasket blew
what could the problem be

Title: Re: scorpio 2.5 tdi
Post by Snoopy on Apr 8^th, 2008, 3:11pm

It has to go through the drive cycle before it will run correctly ....may just be that ..... see HERE (http://www.fordscorpio.co.uk/drivecycle.htm) Hope it is as simple as that .

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 8^th, 2008, 4:48pm

this car is a 1995 2.5 tdi executive
manual gearbox. if i drive it i fill the street with smoke.
i ahve went over thw whole engine to see if there any leaks i have come across a pipe from the exhaust manifold that is leading what i think is the egr
and the engine temp is not moving in the car so i suspect that the sensor on the last head under the header tank may be faulty could this be what causing my problems

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 9^th, 2008, 11:26am

i have taken everything apart again i now i have found
a bent rocker push rod at no2 cylinder head all the piston crowns had black soot on them what could be the cause of this and will it happen again if a put a new ones in

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 10^th, 2008, 8:03am

low and beholed ford dealer has new push rods wow
i thought everything for the scorpio was obsulete from the main dealer ordered them yesterday and i have put everything back together again i have taken the the rocker arms of no2 cylinder head waiting for the new ones to arrive which ford told me would be here 10.30 am i am not all that disheartened by whats happened as the 2.5 tdi as dream to work on very easy to dismatle and put back together

but what i dont know is what caused the pushrod to bend in the first place the bent push rod was working the rocker arm for the exhaust valve and a word of note if you are unfortunate to have the a blown head gasket dont buy the individuals get the metal all in one gasket and the inlet and exaust manifold gasket is a combined one also metal much better the flimsey gaskets i replaced oh i forgot to say that i had to get an other cylinder head all 4 as 2 of them were cracked
i paid a breaker £90 for all 4 they came of a running vx fontera 2.5tds and fitted the scorpio no problem but you will have to take the temp sensor of you old heads and put it on the new ones as the fontera does not have that sensor

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 10^th, 2008, 12:46pm

remeber to turn the engine to by hand with out the injegtoror in to get the oil to the heads and sretting the valves or you wiill have problems

Title: Re: scorpio 2.5 tdi
Post by sector-9 on Apr 10^th, 2008, 10:15pm

I believe there was a common problem with the hydraulic tappets not expanding fully and the pushrod(s) slipping off the end of the rocker arm (check the main site itself). If this happened and the pushrod somehow got jammed up against an immovable part of the top end then I can understand it bending, and of course the engine would run rough as only on 3 cylinders, but lots of things can cause it to run rough...

Smoking could be a number of causes and we really need to know what colour the smoke is/was (e.g. blue, white, black) to guess at a cause.

Darren

Title: Re: scorpio 2.5 tdi
Post by taliban aka Cheekyboy2 on Apr 10^th, 2008, 10:23pm

the pushrod problem was probably about the only known problem of what is generally a very reliable albeit a bit lazy workhorse....

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 10^th, 2008, 11:03pm

okay guys got the the engine back together and the car now runs a dream yep she was only running on 3 cylinders and the smoke was white but that was caused by unburnt desiel ford mechanic guy told me to turn the engine by hand without the injectors in to expell any air and to get the oil through to the rockers i did this and put the injectors back in connected everthing else and she started first turn of the key i got a little white smoke to start but soon cleared after the unburnt fuel in the exhaust was burnt off the the smoking stopped now she runs a dream

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 10^th, 2008, 11:04pm

cheers guys for your helpful comments

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 10^th, 2008, 11:15pm

seemingly the exhaust valve was open to far and the piston hit the valve and inturn bent the push rod lucky for me the valve did'nt bend i was told that the valves in the tdi are flush to the seats so wont bend like a petrol engine as they are slightly angled in the head hence the valve was pushed back into its seat bending the rod i am also surprised it did'nt break the rocker aswell but lucky for me it was only the rod that was bent now i am one happy guy the car is back on the road running better than ever a lot quieter than it did.

Title: Re: scorpio 2.5 tdi
Post by python9 on Apr 10^th, 2008, 11:33pm

things i used for this job 1 piece metal gasket for the cylinder heads £40 from ebay a combined inlet and exhaust manifolds gasket also metal £11 from vauxhall and new egr pipe gasket £4 ford dealer also 1 pushrod £7 total cost £62 not bad i dont know what a garage would cost to do this job oh and new head bolts