 | Home > Tdi > 300tdi booming under load????? |
 
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2229   
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What are the engine mounts like? Could well be exhaust touching chassis/body when under load
Steve 02' 110 TD5 Double Cab Rebuild Thread |
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12th Sep 2014 3:47pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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that will be next thing i check actually. last week when i had all my junk out boot for sound proofing session, I notice tailpipe rattling against something.when i reloaded the boot i couldn't hear rattle anymore so forgot about it. worth a look.
would an exhaust touching chassis make a booming sound though? My 109 thread my youtube channel Last edited by g-mack on 24th Sep 2014 5:42pm. Edited 1 time in total |
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12th Sep 2014 4:02pm |
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| yostumpy Member Since: 01 Aug 2010 Location: n/kent Posts: 327 |
has it got a straight thro centre pipe?
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14th Sep 2014 9:30pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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no still has silencer, but it sound like a straight through!!!
will have a look around seat box shaggy.  My 109 thread
my youtube channel |
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14th Sep 2014 10:25pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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this is killing me!!!!
had another investigate around for booming noise, Im still convinced its coming from air box induction side!!. induction sounds like a sports exhaust when revving!!! and i can feel slight air movement OUT the induction vent!!! if i take oil filler cap off its louder!!! My 109 thread my youtube channel |
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15th Sep 2014 3:53pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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UPDATE:
replaced rear and center silencer with new allmakes items. its a bit quieter BUT! the booming is STILL there!! 
this is getting very irritating as its so uncomfortable driving it is so loud! i suppose the next thing to replace is the front pipe!. the one that is on does not have flexi, its a straight pipe, so maybe i will try a flexi as that might reduce a few more vibrations too! the tail pipe really does move alot when ticking over i would guess vibrates around 2" side to side! could be an engine moiunt but i don't get any vibes through either of the gear sticks! My 109 thread my youtube channel |
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22nd Sep 2014 2:27pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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how did you get on with the head change job in the end
I fitted a flexi joint in my front pipe on a 200tdi , just brought the joint and welded it in (janspeed stainless exhaust was fitted ) did seem to make a diffirance to vibrations through the body |
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22nd Sep 2014 2:52pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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new head is on and seems fine
not losing water now, no smoke out the back and popping from intake gone! My 109 thread
my youtube channel |
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22nd Sep 2014 3:03pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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that's good then
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22nd Sep 2014 3:04pm |
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| shaggydog Member Since: 12 Aug 2012 Location: Kent Posts: 3347 
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Not got a cracked intercooler?
Cracked or delaminated intercooler pipe? Exhaust mounts not broken or cracked? Does your exhaust bolt to the side of the engine? if so check the bolts are done up tight and that the plate is not cracked or loose. No sooty marks around the exhaust header or turbo flanges? Really feel for you with this it is dragging on a bit now  |
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22nd Sep 2014 5:59pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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all new studs put in new head and all torqued up no props
also mirror finish mating faces with new gasket
hoses seem fine but thinking about replacing as matter of course! had intercooler off for clean out didnt see any cracks but then that could be easily missed. could a dodgy wastegate cause it to boom? My 109 thread my youtube channel |
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22nd Sep 2014 6:28pm |
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| shaggydog Member Since: 12 Aug 2012 Location: Kent Posts: 3347
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Dodgy wastegate would give you performance issues however give it a wiggle and see if it is seized though I don't think it would be as you would get a decrease in performance.
Timing ok? Bonnet Bushes not overly warn and allowing bonnet to rub on engine? |
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22nd Sep 2014 6:46pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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right took the bonnet off and done some filming.
it only booms under load, any gear its rev dependent. so to eliminate wind noise as best as pos i stuck it in low range 2nd gear. from outside you cant really hear the booming! but inside you def can! edit: you need good speakers as its very low frequency! i can here it on my imac but not on my laptop or phone! My 109 thread my youtube channel |
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24th Sep 2014 12:38pm |
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| shaggydog Member Since: 12 Aug 2012 Location: Kent Posts: 3347
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Woah dude that is some serious booming.
Question, did it do it before you put down the sound deadening? Might be the deadening has brought the frequency in line with the exhaust resonance. Exhaust rubbers warn? Try wrapping some exhaust cloth around your exhaust pipe- might help change the resonance. Sounds more like a resonance issue than something loose. |
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24th Sep 2014 6:36pm |
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