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Post by nikolaiv on Dec 9, 2005 7:38:56 GMT 11
Hi there mayeb someone on here can help me, becasue noone else seems to be able to...
My bighorn 3.1TD Auto has just started a horrible vibration from what seems to be the base of the engine area/ transmission... which goes away as soon as revs rise. oil pressure is healty at idle - 2bar and good at revs- 4bar
anyone have any ideas what this might be - has this happened to you?
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Post by geeves on Dec 9, 2005 9:41:14 GMT 11
Take all the belts off the front of the engine and check that all your pulleys are tight. I had this due to the crankshaft pulley comming loose. This normaly happens when the mechanic replacing the timing belt udoes the wrong bolt which is nearly impossible to retorque on the car. In my case the bolt fell out and the keyway in the spacer wore out and the only thing holding the cambelt on was the tension on the fanbelts. This happened 70000 after the belt was changed.
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Post by mudgrip4 on Dec 9, 2005 14:08:53 GMT 11
Just a thought should this situation arise for anyone.
I also had a bad frontal vibration/knock which came from an improperly tightened lower crankshaft pulley - the bottom one for the fanbelt. Whenever it is removed the bolt holding this pulley has to be retorqued to EXACT specifications, not given a bit of a heave and stuck on with locktite. Mine worked loose and stuffed the boss with its keyway - as with Alan above - but also seriously damaged the end of the crankshaft. Normally you have to remove motor, disassemble, then repair crank - a big $$$ job.
However there is a dude from Dunedin who is expert at fixing burred crankshaft ends while still in truck. Travels all round country to do this specialist work and results are guaranteed. Uses some specialist chemical weld stuff. Upshot is this job - including paying his flights dunedin to chch return plus all cost $900 for full repair instead of maybe 3 times that much. Very useful bit of info if this happens to your truck. Mine plus 1-2 other jobs I know he's done are 100%. Guy's name is:
Keith Dixon, 027 432 3284 or 03 453 0501 Dunedin.
Re Nikolaiv's vibration - if you've driven off road at all, check for stones caught inside the plate that protects the bottom of your transfer case. Stones caught here give some heavy vibrations - everybody's favourite worry until you figure out the problem. Worth a look.
Mike
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Post by geeves on Dec 9, 2005 15:09:51 GMT 11
Yes on mine the crank was ok luckily and I got a good boss and new crank shaft bolt. very cheap. The fan belt pulley had worn right through the cambelt cover though. Its not nice when your mechanic freind says check this bolt and you have to say "what bolt??!?"
There are 4 smaller bolts in the pulley and these are the ones your meant to undo to remove the pulley
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Post by Harry on Dec 9, 2005 21:54:41 GMT 11
When mine did the same it also burred the head of the 6mm bolt behind the pulley.Made a pretty impressive occasional shrieking sound.It did it in the local Warehouse carpark and gave a couple of females a hell of a fright.Yours truly nonchalently turns the radio up a bit and drives away.Idiot!
Harry.
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Post by geeves on Dec 10, 2005 15:48:28 GMT 11
Mine only sounded like a big end bearing shell had fallen out at idle but off idle the noise went away. I to drove round for 2 days like that. and now have a rtv filled hole in the timing cover to prove it.
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Post by nikolaiv on Dec 13, 2005 9:52:28 GMT 11
Hey guys thanks for the advice, The local mechanic seems to think its a bent conrod or somthing similar. as the noise has gotten much louder. Something i forgot to mention was that two weeks ago the toyota dealer who does the servicing on it over filled it with oil (approx 300mm higher than the high mark on the dipstick) which i didnt realise until i`d driven to chch from balclutha and back. The extra oil was drained and all was well until the noises started.
I`ve done the old screwdriver against the sump trick and i`m fairly certain the noise is coming from there. My problem is now... is it worth fixing the truck when the cost of the repair (approx 3k for a new engine and 1.5k to fit) is worth about as much as the truck (its a 94 lwb irmscher with 193k)??
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Post by geeves on Dec 13, 2005 10:48:10 GMT 11
How much oil did Toyota charge you for??? If you can prove they overfilled it They will pay but wont be happy about it. I think the correct fill for the 3.1 is about 6 liters someone else will have to confirm.
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Post by geeves on Dec 13, 2005 17:54:57 GMT 11
just confirmed in the book 6 liters if the filter is changed 5 if it isnt. 300mm over the high mark They must of stopped filling when oil ran out the dipstick tube.
These engines dont drain that well out of the head resulting in it taking a long time after oil is added before it shows on the stick. Ive overfilled mine a couple of times because of this but 300mm over that must be nearly the sump capacity all over again. The only time Ive ever poured that much in was when I forgot to put the sump plug back in first.
I wouldnt drive it till its fixed. You might get away with a replacment piston and rod but you need to check the crank for straightness as well.
To overfill by that much can only be described as negligence and could easily be the cause but you wont know till the engines out I belive the company that did this should pay providing the knock doesnt prove to be somthing else
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Post by Harry on Dec 13, 2005 18:21:39 GMT 11
With the oil that deep the pistons would have dunked themselves in the oil at the bottom of their stroke.When the motor was stopped oilwould have seeped past the rings and caused the motor to hydraulic itself.On my Bighorns there's a sticker in the engine bay marked oil ok half way between the marks and no good over the top mark.So Isuzu wouldn't have been overly impressed with 300mm over the top mark. Good luck with your discussions with the Toyota bloke.
Regards, Harry.
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Post by mulover on Dec 13, 2005 18:51:19 GMT 11
I had a garage over fill my 2.8 by 1.5 litres once, didn't do any damage, but come on, where they pumping it in or something, 300mm is a long way!!! I do my own changes now, but would recommend to anyone to specify to the mechanics to only put in the required amount of oil. My one takes 5 litres neat when changing filter as well.
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Post by geeves on Dec 14, 2005 11:19:04 GMT 11
2.8 = 5 liters 3.1 = 6
actualy the 2.8 still has oil left in a 5 liter bottle when full even with a filter change. Even with top ups thats slowly building up to about 2 liters left over
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Post by Yarno on Dec 14, 2005 15:46:31 GMT 11
2.8 = 5 liters 3.1 = 6 actualy the 2.8 still has oil left in a 5 liter bottle when full even with a filter change. Even with top ups thats slowly building up to about 2 liters left over I always found my 2.8 was over 5litres like about 5.5 as I could never get 4 services out of a 20l drum |
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Post by justin on Dec 14, 2005 16:48:10 GMT 11
Hey Yarn, got a few pics of your new treads there mate? Sure you couldn't get something wider on there?  J |
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Post by francesco on Dec 14, 2005 16:54:26 GMT 11
lol ...... yeah come on Yarno....we need some updated pics
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Post by Yarno on Dec 14, 2005 20:11:43 GMT 11
yeah yeah, it's a pitty they are only just sitting there without rims.... and no engine... but anyway .jpg) .jpg) There 325/85 r16 XML's ex army tyres and they can be regrooved  |
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Post by mulover on Dec 14, 2005 20:31:31 GMT 11
Those are some big tires!! Thats odd about the oil capacities of a 2.8, you would think they would be the same??, guess some china man might have been having some "hurbs" the day he pu my motor together
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Post by nikolaiv on Dec 15, 2005 9:56:03 GMT 11
Sorry guys, a typo on my behalf, was 30mm over the high mark.
Have had the engine stripped, and its run 2 bearings as well as bent a conrod... but it was stil running and pulled a rather heavy trailer (3 ton+) 50kms along the open road (long story and i didnt want to do it but no choice/options) so I have to say isuzu know how to make an engine -shame about the ancilliaries like turbos and alternators and power steering boxes and..... etc
So i`ve found a second hand engine with 70k on the clock for 2.5k and i`m getting that slung into the truck this week so I have her back for christmas. The toyota garage is denying all knowlege and I can`t be bothered getting lawyers involved so i`ll eb stuck with a big bill Yay for me.
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Post by geeves on Dec 15, 2005 11:04:31 GMT 11
If its run 2 bearings then I doubt the overfilled oil did it. Good luck with the new engine. Isuzu dont make the turbos or alternators These are the same as most other similar cars
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Post by James W on Dec 15, 2005 12:57:49 GMT 11
"If its run 2 bearings then I doubt the overfilled oil did it"....
Maybe, but I also think it's possible with at least one bent con rod, maybe more cons bent that are hard to see with the eye, there could be unexpected loads on the bearings, especially if the bent con has a twist. Are the run bearings the big end bearings or main bearings? Are the run bearings run/worn evenly or one side or some other unusual wear?
The knock more than likely was one of the big ends sloppy, it often goes away at certain revs as you described.
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