Toyota 1HZ Engine Report

Hughesy
Dunno why the link don't work for you , here it is again. works fine when I click on it.
Site Link

try that

Doug

I am interested to hear what your non consistent ticking noise turns out to be...

I have a 1HDT and have a similar thing with mine.. for my money it is the valves but I have had it to the mechanic on 2 occasions now and for the life of me I cannot make it make the noise for them to hear when it is there... frustrating!

My symptoms are basically an intermittent ticking noise (sort of a high speed rattle than anything else) sometimes it is there sometimes it is not... The motor will not make the noise until I get to just under 2000 rpm and then it will make the noise until around 2300 then it will quiet down again.. I know that these motors have a rattle in them at around the same revs and I have heard it called crankshaft detonation before.. sort of like rattling a few marbles in a tin can... but this noise is completely different!

I initially thought it was a lifter collapsing but I don't think it is... I have had the valve clearances done a while back and the mechanic doesn't seem to think it is the valves making the noise... perhaps there is another problem! Mechanic says that if it was valve clearance the noise would be there all the time and not come and go??????????????????

The end result of it all is the mechanic calls it "engine rollover" and it is a noise coming from the clutch????? sounds suss to me but what can I do... I can't find anyone to give me a clue on what it could be besides that and i don't want to spend a fortune changing the clutch out to find out the noise is still there.

Sea-Dog, yes mine makes it just above 2000rpm till about 2400rpm while accerating but if I back off it will stop, however as I slow down without my foot near the accelerator it will come in again below 2000rpm till around 1500rpm. Very wierd and now that I'm listening for it all the time, I've got in my head thats its getting worse. Mine definately does it all the time and can easily be heard so I shouldn't have any dramas getting a mechanic to hear it.

The theory about if the clearances are wrong then it should make the noise all the time is what I reckon too which is why I'm a little more worried that its something else.

Does yours sound like its coming from the passenger side of the engine bay???

The ticking noise from the clutch that you talk about is different. I had that on my last cruiser. I could only hear it at idle and soon as you put your foot on the clutch it would stop. You can clearly hear it with the engine running in neutral squating beside the drivers door. It made that noise from the day I bought it to the day some lowlife stole it (50K) and it never got any worse - so don't go touching the clutch for that noise.

What has me worried is that I read on another forum a bloke with the same problem and he said he was told it was crankshaft flex and he got his replaced under warranty. I'm very sceptical of that explaination though.

Anyway when I get it in to a workshop (got to find a good one first) and get the valves done I'll post a thread on if it cured the ticking or not.

sounds like my speedo cable when it dried up.

Owen

obee
Yeh ...they get a noise going eh , and the old needle starts a jumping about, . I had some goose in Mt Isa tell to fix it I would have to buy the whole kit, rip the old casing out through the fire wall , so old fool here goes and gets the kit , I got as far as unscrewing the connector from the G/Box and I found I could pull the cable right out , so I did, loaded it up with Wynnes Grease and slid it back in and to this day it's doing fine, Took the kit back for a refund,

Doug

From memory, there were some posts a while ago about the ticking noise being a crankshaft problem, either broken or cracked or a lot of float - can't remember the details.

Similar "ticking" noise in my 2.8D Hilux turned out to be a worn cam follower bucket. 1HZ's have the same setup.

Member - Hughesy (NSW) posted this followup

Sea-Dog, yes mine makes it just above 2000rpm till about 2400rpm while accerating but if I back off it will stop, however as I slow down without my foot near the accelerator it will come in again below 2000rpm till around 1500rpm. Very wierd and now that I'm listening for it all the time, I've got in my head thats its getting worse. Mine definately does it all the time and can easily be heard so I shouldn't have any dramas getting a mechanic to hear it.

The theory about if the clearances are wrong then it should make the noise all the time is what I reckon too which is why I'm a little more worried that its something else.

Does yours sound like its coming from the passenger side of the engine bay???
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The sound does sound like it is coming from the passenger side... but obviously not WAY over on the side.. I was toying with the idea that it was the fuel pump and have been under the bonnet pushing and pressing and pulling on parts to see if anything around the pump etc is loose and could cause the ticking noise.. When I first got the car a few years back (bearing in mind it is a 92 80 series) it had a rattle at a certain speed etc.. turned out to be a link at the fuel pump that is moved by the actuator when the motor is started.. I think it is the advance for the air con.. you will see a vaccuum advance thing linked over an acuator arm.. this arm has a poly bush that was worn so it vibrated.... you may have something like that with yours but mine sounds much more like valve noise! I am thinking it is too loud for crankshaft and am going to have the valve clearances done in a week or so to check it out...

Gerhardp1
When I had a 1993 Daihatsu Rocky 2.8TD , being only a 4cyl I changed oil every 5/6000 Klm .,Now with a 6cyl all the 6 years I have Owned it I change the oil at 10000 k intervals, It runs like a dream , sounds like a new motor still , why would I want to waste oil and dollars , besides I would be changing the Oil every 6 days some weeks , My Troopy is doing around up to 130,000 some years , I have averaged about 98,300 each year.

Doug

Manuel specifys 10k oil changes under normal operating conditions