Noisy intake on 79 series cruiser diesel??????WTF

Submitted: Thursday, May 14, 2009 at 21:33
ThreadID: 68834 Views:2700 Replies:8 FollowUps:2
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Hi, just after some advice on a land cruiser tray back I bought recently. As I accelerate and change up through the gears, at around 2000 rpm I can hear this kind of chugging noise in the snorkel!!! It sounds a bit like an old truck, then as the revs build up more the noise goes away and it drives like your regular slow non turbo '05' 79 series diesel Landcruiser tray back......
I had the mechanic at work listen to it and he said its nothing to worry about, but I 'm not so sure! A mate also just bought an 06 and his makes the same noise.
I have never heard this on any other cruiser I ve had. Any advice would be greatly appreciated.
JB
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Reply By: Richard Kovac - Thursday, May 14, 2009 at 21:40

Thursday, May 14, 2009 at 21:40
JB

is it when you back off or on over run? My Troopy started to make a noise that seemed to be coming from the snorkel but it is the steel tube used as fuel line (top RH side under bonnet).

I just put up with it

Cheers

Richard
AnswerID: 364929

Follow Up By: Bluey221 - Thursday, May 14, 2009 at 21:50

Thursday, May 14, 2009 at 21:50
Richard,

Its just when you increase revs and only when it gets to around 2000 rpm, its really noticeable under load compared to reving it in neutral to listen for the noise.
So the tube made a noise on yours? that seems strange!
Thanks, I'll check it out
JB
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FollowupID: 632572

Reply By: Member - Stuart P (WA) - Thursday, May 14, 2009 at 23:41

Thursday, May 14, 2009 at 23:41
yurbo loading up?
AnswerID: 364959

Reply By: Rockape - Friday, May 15, 2009 at 07:15

Friday, May 15, 2009 at 07:15
A lot of our work 79/78 tray backs used to do the same,

I think it must just be a resonance in the intake pipe, could be wrong but I think the expansion chamber in the intake pipe is there to take the noise out.
AnswerID: 364974

Reply By: tim_c - Friday, May 15, 2009 at 11:42

Friday, May 15, 2009 at 11:42
I'd read elsewhere of a similar noise in similar conditions. One guy seemed to think it was wind/air moving between the snorkel and the car body and reckons he fixed the problem by packing the gap with sponge/foam.
AnswerID: 365019

Reply By: get outmore - Friday, May 15, 2009 at 12:40

Friday, May 15, 2009 at 12:40
I heard that its one thing that Highclones can do is reduce induction noise
AnswerID: 365030

Reply By: Dunedigger - Friday, May 15, 2009 at 17:14

Friday, May 15, 2009 at 17:14
It is fuel hammer in the fuel lines. Toyota fitted a 'gizmo' to stop it in later models. I'm told toyota will fit the 'gizmo' on request. It sounds just like a jakebrake ! at about 12000 rpm and only happens when the fuel is cold.

Dunedigger
AnswerID: 365081

Follow Up By: get outmore - Friday, May 15, 2009 at 17:32

Friday, May 15, 2009 at 17:32
Is it a TD or not? you dont get it on NA 1hz
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FollowupID: 632717

Reply By: Dunedigger - Friday, May 15, 2009 at 18:26

Friday, May 15, 2009 at 18:26
This has been brought up before Fuel Hamer


Dunedigger
AnswerID: 365089

Reply By: Horacehighroller - Friday, May 15, 2009 at 20:41

Friday, May 15, 2009 at 20:41
G-day Bluey,

If it happens on acceleration between 1,800/2,200 rpm then it's because the engine is at peak torque.

I didn't have a snorkel on my HZJ 80 but with the back doors open it was quite noticeable from the exhaust.

A snorkel would likely bring the intake component closer.

Peter
AnswerID: 365102

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