406 exec serious boost problem! help!!!!

burnsey · Post by **burnsey** » Tue Oct 31, 2006 10:37 pm

hi guys, car was running fine and then all of a sudden lost all boost, now doesn't even feel like theres a turbo on there! no sound from the dump valve and boost gauge doesn't go past 0! any ideas on what this could be anyone please? thanks

mjb · Post by **mjb** » Tue Oct 31, 2006 10:54 pm

burnsey wrote:no sound from the dump valve and boost gauge doesn't go past 0!

Sound from the dump valve?
Boost gauge?

It might help if you tell people what you've modified with the turbo when you're asking for help on it...

any ideas on what this could be anyone please? thanks

Sounds like your turbo's shafted. Not the easiest nor cheapest of repair jobs, that. There's been several recent posts about turbos you may like to search for

burnsey · Post by **burnsey** » Tue Oct 31, 2006 10:59 pm

sorry, its a 1998r reg 406 exec turbo, dump valve, boost gauge and ball bearing boost controller!

niz406 · Post by **niz406** » Wed Nov 01, 2006 9:54 am

Typically I'd say.... siezed turbo...

You need to get the air feed pipe off and see if you can turn the compressor wheel with your fingers freely.... if it doesnt turn then its gone bye bye... its not that hard to repair replace, just time consuming... do you have any mechanical experience DIY or Commercial?

Post by **Welly** » Wed Nov 01, 2006 10:31 am

No one's suggested the common failed intercooler problem..........

Worth a look surely?

niz406 · Post by **niz406** » Wed Nov 01, 2006 10:46 am

Intercooler broken would still show boost activity on the guage.... and the car would still use some of the provided boost, the std boost controller would never open the wastegate so it would constantly boost !

Post by **Welly** » Wed Nov 01, 2006 10:47 am

DOH !

Davva2004 · Post by **Davva2004** » Wed Nov 01, 2006 11:33 am

Check that the wastegate isn't stuck open!

burnsey · Post by **burnsey** » Wed Nov 01, 2006 5:56 pm

hi guys, thanks for the responses! just had it up on the ramps (again! have only just changed the gearbox!!) checked the actuator arm and can move that, havn't been able to get the pipe off to check the blades in the turbo yet but doing that 2morro! on the gauge, even if revved flat out, it only goes as far as 10hg so theres definatly no boost, can't even here the turbo spinning up! is it a common fault for the turbo to be working 1 moment and then just to seize up? have had quite a few turb'd cars before and not heard of it! gave no forewaarning that it was gonna go or anything! could it be anything else? have checked all the pipes etc. thanks again

niz406 · Post by **niz406** » Wed Nov 01, 2006 6:23 pm

Milage of the car?
Frequency of oil change?
Quality of oil?
Running temps....?
Coolant ?

burnsey · Post by **burnsey** » Thu Nov 02, 2006 9:29 pm

well, got the pipe off and had a check of the blades today and they're seized solid unfortunatly! anyone know what sot of price another turbo will be and any suggestions on best place to get it? cheers

niz406 · Post by **niz406** » Fri Nov 03, 2006 12:51 am

Are you going to take it off and put it back on?

Another turbo will cost you, exchange .... about £500 or repair about £300 approx... or you can do it yourself, if you buy the service kit !

What do you think you will do?

burnsey · Post by **burnsey** » Mon Nov 20, 2006 7:52 am

hi guys, well managed to get a turbo from a local breaker 4 60+vat, which i didnt think was 2 bad! so its all up an running again now! just trying to sort the electrical faults now!!

niz406 · Post by **niz406** » Mon Nov 20, 2006 9:53 pm

Ahhh I see... that was a good price... how many miles had it done ?

So is it all running perfect again ?

burnsey · Post by **burnsey** » Tue Nov 21, 2006 7:53 am

done about 50k i think! seems 2 be running well again, 4 now anyway!!!

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406 exec serious boost problem! help!!!!

406 exec serious boost problem! help!!!!

Re: 406 exec serious boost problem! help!!!!