300tdi abnormal intake noise!

vandy33

vandy33

Member
May 19, 2021
16
0
Pennsylvania
Hoping someone can help me sort this out… I have a 94 disco 1 which we swapped with a 300tdi from a 95 defender. Recently have but on a new high flow head from turners after the old one was cracked and new mls head gasket and gasket kit… New valve caps, pushrods, were also fitted and I have adjustment the lash to spec over and over and it’s right on but I have this weird intake noise??

https://youtube.com/shorts/funrYRAHUVg?feature=share

Has a mantec snorkel, in-line air filter, silicone hoses fuel turned up a lil
Oil pressure good… Pls help!

Sounds similar to this !

Fixed it! Turned out to be the air filter creating a weird resonance booming noise !
 
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Tugela

Tugela

Well-known member
May 21, 2007
4,766
566
Seattle
You may get an answer here and you may also consider posing the question on the NAS-ROW forum. That's mainly for Defender owners, but I expect there are more people with 300TDI familiarity on that forum than there are here.
 
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terryjm1

terryjm1

Well-known member
Jan 23, 2011
1,501
383
I am not sure I hear the noise. The engine sounds just like mine which I think is a good thing. How does it drive?
 
vandy33

vandy33

Member
May 19, 2021
16
0
Pennsylvania
www.landyzone.co.uk

booming air box 300tdi???

this has been bugging me for months now! as revs climb there is an awful booming in cabin! very loud. first thought was blown exhaust.checked for leaks all good, replaced all zorst gaskets including manifold. started to think it might be related to my knackered head gasket. but thats all fixed...
www.landyzone.co.uk www.landyzone.co.uk

same thing on this forum! Am I just paranoid ?
 
terryjm1

terryjm1

Well-known member
Jan 23, 2011
1,501
383
vandy33 said:
www.landyzone.co.uk

booming air box 300tdi???

this has been bugging me for months now! as revs climb there is an awful booming in cabin! very loud. first thought was blown exhaust.checked for leaks all good, replaced all zorst gaskets including manifold. started to think it might be related to my knackered head gasket. but thats all fixed...
www.landyzone.co.uk www.landyzone.co.uk

same thing on this forum! Am I just paranoid ?
Click to expand...
Read that whole post. Looks like he gave up after spending a lot of money and time. I do think he had a valve that was sticking intermittently. Frankly, I cant be sure if I am hearing background wind noise in the video or the noise you are describing. If you are having the booming noise he describes while driving, could it be a body panel flexing in and out? Maybe some part of the air induction system flexing in and out? Maybe the air induction system is pulling a panel in and or pushing it out? i used to live in a house that the large furnace duct right by the furnace would make a loud booming noise sometimes as the air pressure forced the large duct plenum to expand. It was worse and more frequent when the filter was really dirty. I could see this happening (body panel flexing) in a Defender as they are like big tin boxes.
 
Last edited:
vandy33

vandy33

Member
May 19, 2021
16
0
Pennsylvania
terryjm1 said:
Read that whole post. Looks like he gave up after spending a lot of money and time. I do think he had a valve that was sticking intermittently. Frankly, I cant be sure if I am hearing background wind noise in the video or the noise you are describing. If you are having the booming noise he describes while driving, could it be a body panel flexing in and out? Maybe some part of the air induction system flexing in and out? Maybe the air induction system is pulling a panel in and or pushing it out? i used to live in a house that the large furnace duct right by the furnace would make a loud booming noise sometimes as the air pressure forced the large duct plenum to expand. It was worse and more frequent when the filter was really dirty. I could see this happening (body panel flexing) in a Defender as they are like big tin boxes.
Click to expand...
I’ll post another video of it today ! I am going to disconnect the snorkel as the pipe runs along the inside of the fender and could be rattling making this noise ??
 
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