Outer Limits 4x4 Board

hi everyone just joined outer limits in the hope that someone has experienced the same problem and can shed some light on the situation.

Sorry for the lengthy post but i figure all the details are needed to diagnose problem.

about 2 months ago purchased a 91 model vx sahara 80 series auto with a 1hd-t motor with 270 on the clock, beautiful car verything works factory lockers, centre console fridge, duel air, was absolutley stoked.

first weekend took the car up to oriely's (very light 4x4 track) to see how it went offroad,opened it up to 115 on the highway on the way home, was almost home after a four hour drive and red turbo light flicked on briefly a couple of times, popped the hood a few minutes after, noticed that fan waterpump alternator belts were loose, locking bolt on alternator had sheered off (common problem i'm told), not sure if engine got hot.

next day told the previous owner (workmate) and he informed me that the car had never been over 90 k p/h for 4 years, was not happy!! should of been told this when i brought the car. (soc)

about a week or two later i noticed an inconsistant ticking noise (very similar to a crook lifter in a petrol motor) coming from the motor just as it popped into fourth geer, kept driving thinking it might of been sloppy valve clearances. checked valve clearance (shim and bucket) they were all to speck or .01 to .03 tight

took the car to highway diesel bloke came for a run while driving figured it was auto or turbo, back at workshop loaded revs against the auto to make it make the noise while not moving and came to conclusion it was the turbo, when he reved it to about 3 and a half quickly on and off out of gear it ever so slightly still made the noise rooling out the auto. went home long story short changed the turbo to no avail noise still there not happy

kept driving until noise started to get worse (more common). the noise was only there with the motor under load and was getting worse like clockwork ,present day now it makes the noise in gear at idle sometimes out of gear. have only been driving since to diagnose. brought an automotive stethascope could not find the noise anywere in the top end, head, injetors, injector pump, alternator, waterpump, oilpump, idlers, timing belt pullys.

took belts off (alternator water fan) , took it for a very quick run noise was almost completly gone but was still there, which has led me to think that the extra load on the crank is having a direct effect to the problem. i know these early 1hdt's had big end bearing problems and have also been told that gdgen pins start off as a very slight tick and get worse like clockwork, which is what i have my money on

the only other thing i havent told yuz is that the noise is in time with the cam shaft revolutions wich spins twice to every turn of the crank i believe

so in conclusion i thing i'm in for a bottom end rebuild but want to be sure before i spend any more money, i'd hate to rebuild the bottom end and put it back togethor and hear that #@$!&%$# tick

any help would be very apreciated and thanks for your time

If I were you I would be asking previous owner if he ever replaced the big end bearings, if not then at 270km they need to be done ASAP. From what I have read they need to be done every 100km for piece of mind, not a big job, but I wouldn't be driving if it were mine till I knew the big end bearing history.

Also try LCOOL or Offroad80s forums/websites, heaps of info there. I think that ticking around the top end of those motors is quite common some do it and others don't. I am no expert try those other forums some very 80 series knowledgeable people there and here.

i would say the big ends need doing try fitting an oil pressure gauge and measure the oil pressure. i believe the big ends can be done in the car

I thought that turbo light was overboost, mine used to do it when I was up in big time in the low gears...

Stop driveing now, and get bigend bearings done. Just my opinion.

bj on roids wrote:I thought that turbo light was overboost, mine used to do it when I was up in big time in the low gears...

Im pretty sure the red light is over temp. Our 80 series at work used to come on occasionally towing a van at low revs up steep hills. Sure indication of high temp not high boost.

OH Its a 1HD-t they are all ticking. A time bomb waiting to go off

Is there definately no chance you have an exhaust leak? Either manifold gasket or crack somewhere? Just that the ticking noise you describe like a lifter is very different to a typical big end rattle. Did you probe your stethascope around the exhaust manifold?

I thought that turbo light was overboost, mine used to do it when I was up in big time in the low gears...

Turbo light is definitely overboost think its set on 10-11psi (not sure exactly) not a problem as long as its only flickering occasionally.

its it engine rpm relative or wheel speed realitive?

I know of someone who has done all this replaced everything on their car looking for a ticking noise and later found out that some asshole had put a cable tie on his drive shaft yoke and it was knocking against the underside of the body lol

Good luck with tracking the noise down mate.

As said, the red turbo light on the sahara is over boost. As for the tick, I thought the BEB was more of a rattle than a tick?

Make sure you haven't got a broken injector.

RAY185 wrote:Is there definately no chance you have an exhaust leak? Either manifold gasket or crack somewhere? Just that the ticking noise you describe like a lifter is very different to a typical big end rattle. Did you probe your stethascope around the exhaust manifold?

checked exhaust with stethascope and soapy water, nothing found

bigbrowndog wrote:Make sure you haven't got a broken injector.

checked injector pump and injectors with stethascope some were a little more noisy than others but different to ticking noise, also cracked each injector line wile running, noise remained

As for the tick, I thought the BEB was more of a rattle than a tick?[/quote]


thats what i've heard too which is why i' unsure of what to do, but i have heard of gudgen pins being ticky, comments anyone ??? cheers

110county wrote:If I were you I would be asking previous owner if he ever replaced the big end bearings, if not then at 270km they need to be done ASAP. From what I have read they need to be done every 100km for piece of mind, not a big job, but I wouldn't be driving if it were mine till I knew the big end bearing history.

Also try LCOOL or Offroad80s forums/websites, heaps of info there. I think that ticking around the top end of those motors is quite common some do it and others don't. I am no expert try those other forums some very 80 series knowledgeable people there and here.

cheers will try those forums when i getto it.

ilovecruisers wrote:As for the tick, I thought the BEB was more of a rattle than a tick?

thats what i've heard too which is why i' unsure of what to do, but i have heard of gudgen pins being ticky, comments anyone ??? cheers[/quote]

Bigend will usually have a louder knock on the power stroke than on the return stroke bit confusing if several have gone however. My sons HDJ 80 scared him when it started ticking but it turned out to be the outside of the no2 injector had cracked right around. So he got them rebuilt and bought a new one. Then did the bigends which were starting to wear. Best do them like the others have have pointed out.