vibration in a troopy

Submitted: Saturday, Jul 31, 2004 at 18:01
ThreadID: 15179 Views:1591 Replies:5 FollowUps:2
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I have a 78 troopy diesel. At 1900-2000 rpm it seems to get this resonating through the car .It doesn`t matter what gear I`m in either. It`s done 87000 kms and has done this resonating since I`ve owned it from 70000kms on the clock. When I bought it I had a Garret turbo fitted, by the way it made it a different thing to drive(very happy).Some one suggested it may be some thing to do with the fuel injectors. If any of you forby specialists have any ideas or suggestions It would be v much appreciated.
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Reply By: Member - Pesty (SA) - Saturday, Jul 31, 2004 at 20:19

Saturday, Jul 31, 2004 at 20:19
More likely to be something to do with the exhaust system I think.
AnswerID: 70647

Reply By: Member - John (Vic) - Saturday, Jul 31, 2004 at 20:38

Saturday, Jul 31, 2004 at 20:38
marts
Sometimes some equipment developes a vibration or resonance at a certain rev range, this is refered to the critical speed range.
I have been involved in all sorts or rotary and other machinery and sometimes you can cure it by trial and error or somtimes you need to just push through the rev range that the problem occurs in and suffer it.

Try checking the vibration isolation points that the exhaust hangs from, on the 78 the exhaust actually hangs in rubber vibration mounts, chech that it has not been knocked of the mounts and it contacting any body or other meteal componant.
It could be as described above a critical speed range in the turbo.

In the end its probably going to be a bitch to find.

Let us know if you do find the problem.
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AnswerID: 70654

Reply By: Member - Brett H (QLD) - Saturday, Jul 31, 2004 at 22:57

Saturday, Jul 31, 2004 at 22:57
Check the rear pinion. I had the same problem (non turbo) everyone thought it was the engine or exhaust, tyres or alignment. The collapsible spacer collapsed too much and the pinion was loose.
AnswerID: 70682

Reply By: CHRIS - Sunday, Aug 01, 2004 at 11:28

Sunday, Aug 01, 2004 at 11:28
Haven't got your free wheeling hub's engaged have you!
AnswerID: 70715

Follow Up By: CHRIS - Sunday, Aug 01, 2004 at 11:32

Sunday, Aug 01, 2004 at 11:32
Also check that you haven't pumped too much grease into the rear tailshaft, as I did. It pushes the diff back and causes a bad vibration. Remove the grease nipple and see if it exhumes grease.
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FollowupID: 330904

Follow Up By: Member - Brett H (QLD) - Sunday, Aug 01, 2004 at 17:40

Sunday, Aug 01, 2004 at 17:40
A bloke in Derby did that. After pumping half a cartridge into his tailshavf yoke he came and asked me " how muck grease do these things take mate" you should have seen the look on his face when I said 1 or 2 pumps every 10000km.
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FollowupID: 330968

Reply By: CraigQ - Sunday, Aug 01, 2004 at 17:03

Sunday, Aug 01, 2004 at 17:03
Marts,

Check the exhaust system and see if the mob who fitted the turbo fitted a bracket from the exhaust to the transfer case.

I had a turbo fitted to my 100 series a few months back and when I picked it up the fitter said that the exhaust supplied in the turbo kit was running to close to the chassis.

As a result he fitted a bracket from the exhaust to the transfer case.

At idle the vibration through the car was skocking and at a certain rev range the vibration returned.

I then took the car to the exhaust place who removed the bracket and repaired the exhaust. Problem fixed, no more vibration.
AnswerID: 70757

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