turbo rodeo

Submitted: Wednesday, Jun 11, 2003 at 18:50
ThreadID: 5409 Views:1367 Replies:5 FollowUps:6
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my 96 2.8 rodeo develops a noisy hum at 3000 to 3500rpm which I feel is due to the air induction system, has anyone else get this problem?thanks
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Reply By: Leroy - Thursday, Jun 12, 2003 at 12:42

Thursday, Jun 12, 2003 at 12:42
Hmmm did you recently fit a snorkle?

Leroy
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Follow Up By: boof - Thursday, Jun 12, 2003 at 18:33

Thursday, Jun 12, 2003 at 18:33
No I didn't. Thanks
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Reply By: colin - Thursday, Jun 12, 2003 at 17:19

Thursday, Jun 12, 2003 at 17:19
could be just the noise a 4 cyld makes try getting in a hilux they have the same drone. Col
AnswerID: 22361

Follow Up By: boof - Thursday, Jun 12, 2003 at 18:34

Thursday, Jun 12, 2003 at 18:34
Do Hilux's do 3000 rpms???????
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Reply By: colin - Thursday, Jun 12, 2003 at 21:27

Thursday, Jun 12, 2003 at 21:27
sorry boof you missed the point 4 cyld get a drone up doesnt matter what make same on petrol and diesal car or 4wd, so why are you working the rodeo at those sort of revs, have to ask as i have a 6 cyld diesal and working at those sort of revs is not nessicary. Col
AnswerID: 22380

Follow Up By: boof - Sunday, Jun 15, 2003 at 22:05

Sunday, Jun 15, 2003 at 22:05
Colin, 3000rpm is approx 100 km/h, 3200 rpm is 110 km/h, and over here is the west we are allowed to do 110 on open roads, and given the long distances between towns the speed does slowly creep up a bit , but the rodeo loves to sit on 3200 rpm and gives good fuel economy, 8.9lit/ 100km and heaps of get up and go for overtaking, this is in 5th gear. so given that a lot of the time spent in the car at that rev range, and it is in all gears,it is slowly starting to make me wonder what it may be, thanks for your note. boof.
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Reply By: xr500 - Friday, Jun 13, 2003 at 16:36

Friday, Jun 13, 2003 at 16:36
is it in all gears or just top?
could be centre bearing in tailshaft or muffler maby??
AnswerID: 22437

Follow Up By: boof - Sunday, Jun 15, 2003 at 22:09

Sunday, Jun 15, 2003 at 22:09
XR500, the vibration/noise is in all gears, and I am waiting for the muffler to rust out to see if it is the cause of the problem but the bloody thing is still orignal so I had thought that maybe there may be a baffle or a problem with the internals, so I will wait for it(the muffler) to die first. thanks, boof
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Reply By: Matt M - Saturday, Jun 14, 2003 at 23:06

Saturday, Jun 14, 2003 at 23:06
Boof, I have a 93 MU and it used to have the 2.8 td for aroound 90k km, it was great and didnt have any noticable hums at any revs. It is the same engine apart from a timing belt as opposed to the Rodeos timing chain. After a misshap I replaced the cooked 2.8 with a later model 3.1l td (MU but basically Jackeroo) and again no hum. Only a slight noise increase recently when I fitted a snorkel (Rodeo Airtec) and that might even just be wind noise around the external body of the snorkel.
Top little truck and engine!! Have you driven any other Td Rodeos to see if this is just your truck or an inherant problem, personaly I havent heard of it before!
AnswerID: 22533

Follow Up By: boof - Sunday, Jun 15, 2003 at 22:17

Sunday, Jun 15, 2003 at 22:17
Matt M, I have only driven two others, one 4wd, and the other 2wd, the 2wd had the same noise and I couldnt pin it down either.
yes they are a great truck and a very strong engine and am very pleased with it, as in the past Ive had a landcruiser, 3 hiluxs and 2 navaras and 2 mitisbushi l200 and would say that the only thing that comes close to the rodeo is the l200/tritions.
has your fuel economy improved with the snorkel ?
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Follow Up By: Matt M - Monday, Jun 16, 2003 at 09:23

Monday, Jun 16, 2003 at 09:23
Fuel economy? Nah didnt really change with the snorkel, only noticeable difference is mine used to hurt in hot weather!! NOTICABLEY!! Crossing the Nullabor in summer I could feel it slowing/losing efficiency as the air temp got up, but later with the snorkel the temp differences are no where near as noticable.

The air cleaner, obviously is a hell of alot cleaner, picking the air up higher than from the engine bay.

The other big difference was the 2.5' exhaust, it gave the truck alot more torque, it was audibly asmatic before the exhaust upgrade and this may also be the cause of your resonance. I still havent had it tuned up after the upgrade and that was about 60k km ago. Realistically I should have to benefit from the more flow up top, therefor allowing for more fueling than before.

Good luck with the noise hunt, they can really get to you cant they!!
let us know how you go!

Matt.
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