Problems with my 1992 fzj75rv landcruiser troopcarrier
Submitted: Wednesday, Aug 17, 2022 at 12:09
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Declan M
Hey everyone,
About 2 hours into a recent trip the rear muffler popped open on my petrol 75 series. New rear muffler fitted all good but the car now making a whirring/whining/squeaking noise as I accelerate through 2000rpm, which it wasn’t doing before.
Any ideas? Myself and the mechanics are stumped! Doesn’t effect the drive but a disconcerting noise I’m keen to get sorted.
Thanks!
Muffler blown open
Reply By: Member - Warren H - Wednesday, Aug 17, 2022 at 13:26
Wednesday, Aug 17, 2022 at 13:26
How did it blow open, a backfire? I presume that you have tried all the usual things, trying to move the exhaust pipe. Could it be an exhaust pipe join moving, perhaps disturbed by the work? Otherwise it's a tedious process of elimination. You would have to think it would be related to the original fault/cause or the repair. I haven't played around with exhausts for many years, my old Maverick's lasted the entire 23 years and 345K km that I owned it despite a few vicious backfires.
AnswerID:
641450
Reply By: Declan M - Wednesday, Aug 17, 2022 at 13:32
Wednesday, Aug 17, 2022 at 13:32
Yeah appeared to be a backfire that opened it up, was cruising at 105 km/h and heard a loud bang from under the car.
Joins appear to be in order, took it back to them after noticing the noise and they made sure to tighten everything up and gave it a
check over but the noise persists.
AnswerID:
641451
Follow Up By: Member - Warren H - Wednesday, Aug 17, 2022 at 15:32
Wednesday, Aug 17, 2022 at 15:32
Perhaps upstream issues caused by the backfire eg manifold gasket leaking. Do you know what caused the backfire? Does the noise only occur when moving, transient or constant at that speed and rpm, same in all gears, the possibilities go on? Do you have a hand throttle so that you could set the motor to 2000rpm
FollowupID:
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Follow Up By: Bob Y. - Qld - Wednesday, Aug 17, 2022 at 18:06
Wednesday, Aug 17, 2022 at 18:06
I was thinking manifold gaskets even before reading Warren’s follow-up. A 30 year old engine is going to have at least a few brittle gaskets, and the explosion that buggered the muffler would have no trouble spitting out a small section of gasket.
Be a good place to start looking anyway.
Bob
FollowupID:
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Follow Up By: Declan M - Wednesday, Aug 17, 2022 at 18:12
Wednesday, Aug 17, 2022 at 18:12
Thanks so much guys I’ll look into it
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Reply By: Declan M - Wednesday, Aug 17, 2022 at 15:37
Wednesday, Aug 17, 2022 at 15:37
Thanks for the suggestion,
didn’t work out what caused the backfire, didn’t appear to be any blockage or fuelling issues.
AnswerID:
641453
Follow Up By: Member - Warren H - Wednesday, Aug 17, 2022 at 15:44
Wednesday, Aug 17, 2022 at 15:44
Poor spark, faulty high tension leads? That was always the issue on my vehicle, but Nissan engines seemed to be a bit prone to backfiring. I'm afraid my knowledge fades out with modern engines. Good luck.
FollowupID:
920598
Reply By: Member - William B - Wednesday, Aug 17, 2022 at 16:06
Wednesday, Aug 17, 2022 at 16:06
Has that engine a catalytic converter?
Maybe the cat is loose in the housing?
What did they put the backfire down to.
The open muffler doesn't look like the motor hasn't been overfueling
AnswerID:
641454
Follow Up By: Declan M - Wednesday, Aug 17, 2022 at 16:14
Wednesday, Aug 17, 2022 at 16:14
Don’t believe it has a cat, they (mechanic) couldn’t work out how the backfire happened either.
Mechanic didn’t give a definite reply on whether it does have one or not but he said he doesn’t think it does. I can’t seem to see one myself but I’m no genius when it comes to this stuff. Google hasn’t been very helpful in answering the question either.
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Follow Up By: Member - Warren H - Wednesday, Aug 17, 2022 at 16:37
Wednesday, Aug 17, 2022 at 16:37
From my memory initially, catalytic converters weren't required on heavy 4wd vehicles. This was an issue when some agencies swapped out their Nissans and Toyotas for Subarus which were required to have cat converters and promptly started fires in farmer's paddocks. I had a 1994 built Ford Maverick which didn't have a catalytic converter.
FollowupID:
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Reply By: Member - nickb boab - Wednesday, Aug 17, 2022 at 20:35
Wednesday, Aug 17, 2022 at 20:35
Question.. what does the RV represent in your intro ??
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Follow Up By: Declan M - Wednesday, Aug 17, 2022 at 20:45
Wednesday, Aug 17, 2022 at 20:45
Think it’s Toyota’s model code for right hand drive vehicles
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Follow Up By: Member - nickb boab - Wednesday, Aug 17, 2022 at 21:08
Wednesday, Aug 17, 2022 at 21:08
Blowing out muffler is usually caused by a build up of exhaust gases..any chance you backed off just b4 this happened ?? So this was an explosion in the exhaust system therefore it may have weekend or put a hole somewhere else in your exhaust system causing the whistle so you probably need to
check your entire exhaust system for what might only be a tiny hole by feel .. or by an exhaust business
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Follow Up By: Life Member - Duncan W (WA) - Thursday, Aug 18, 2022 at 09:54
Thursday, Aug 18, 2022 at 09:54
I have an RV 75series and I think the RV's were the version where it is the 5 seater variant not the 11 seater.
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Follow Up By: Member - McLaren3030 - Friday, Aug 26, 2022 at 09:02
Friday, Aug 26, 2022 at 09:02
Yes, Duncan is correct, the RV Series was the 5
seat variant.
Macca.
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920671
Reply By: tonysmc - Wednesday, Aug 17, 2022 at 20:52
Wednesday, Aug 17, 2022 at 20:52
Hi Declan. Now what I’m going to suggest will sound way out of left field, however for the 30 seconds it takes to rule it out is
well worth it. From your description of “whirring/whining/squeaking noise” I would disconnect the speedo cable at the gearbox, cable tie it out of the way and go for a drive. While I know it sounds ridiculous, I had a whirring/whining noise on my 75 series that I couldn’t track down and spent a fair bit of money replacing uni’s, bearings etc. A mechanic that works on a lot of Landcruiser’s said I should
check the speedo cable as he had come across it a number of times. Turns out he was right and I could have saved a lot of time and money, so I often suggest this
check when people mention strange whirring and whining noises. Now if it is the cable, why would the noise start now? Maybe coincidence, maybe something was moved when the muffler blew or when they were working on it. Maybe its not that at all, but it’s easy and quick to
check and worth ruling it out. Tony
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Follow Up By: Declan M - Wednesday, Aug 17, 2022 at 21:21
Wednesday, Aug 17, 2022 at 21:21
Thanks so much Tony appreciate the help!
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Reply By: Member - pete g1 - Thursday, Aug 18, 2022 at 18:23
Thursday, Aug 18, 2022 at 18:23
from left field..........replace blown muffler & "whirring/whining/squeaking noise' gone !
AnswerID:
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Follow Up By: Declan M - Thursday, Aug 18, 2022 at 18:29
Thursday, Aug 18, 2022 at 18:29
Muffler already replaced
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