Outer Limits 4x4 Board

i think i have either a bent tappet or lifter in my 3L diesel 2.8 litre hilux engine. i'm no mechanic, so i dont really know the difference between a lifter or tappet, but i have been told by a few people that the rather loud "ticking" coming from my donk is a bent lifter. because it sounds like shit, it is going to make it harder to sell. so i was wondering if anyone knows, what would this cost to repair (assuming that is what is the problem), or even if i could do it myself.

any help appreciated.




p.s. the arrows point to what i *think* is the bent part.

I'm not too sure but I thought the intake/exhaust valve had a spring on it that pushed it closed depending on the position of the cam. But if it was a bent valve stem then wouldn't the head have to come off to replace it?

De-lux wrote:i think i have either a bent tappet or lifter in my 3L diesel 2.8 litre hilux engine. i'm no mechanic, so i dont really know the difference between a lifter or tappet, but i have been told by a few people that the rather loud "ticking" coming from my donk is a bent lifter. because it sounds like shit, it is going to make it harder to sell. so i was wondering if anyone knows, what would this cost to repair (assuming that is what is the problem), or even if i could do it myself.

any help appreciated.




p.s. the arrows point to what i *think* is the bent part.

3L's dont have tappets or lifters, they have the camshaft directly over the valves and are adjusted by a shim over bucket system.

Try this quickly;

Whilst the engine is running, remove the oil cap, if the noise gets worse or louder then the noise is internal. If not, then its something on the outside.

Try that then report back here.

Toyota 3L engines dont have rocker or "tappets" as such. The cam runs straight on top of the valves & is adjusted through shims. It is possible that the valve clearance is out causing your noise. What you have to do is measure the valve clearances between the cam & shim, there is a fairly large range with these type of adjustments, and calculate the shim thickness as necessary to get the valve clearance back to specs. You will have to have either a selection of shims handy or know exactly what sise you need before you buy them. They dont often go noisy though, Toyota say to check them at 100,000km (I think) but every one & have done with this many K's on it has been ok.

It might have a broken valve spring which is causing the valve to bounce when it closes but this usually also causes a misfire.

Maybe it has a crook injector & the cylinder is not firing correctly causing a knock. Crack each injector line at idle & see if the knock disappears, this will isolate it to cylinder. If this this does happen I would do a compression test first, then check valve clearances & then have the injectors looked at.

Just a few suggestions.

thanks for the info on my lack of tappets... i didn't know that


ok mkpatrol, the problem is, i thought it was my injectors, so i pulled em out, got a set of brand spankers ($250 later...) and it still makes this ticking noise. i have a few mates with the same donk, and ever since mine went swimming it has been making this noise.

with the assistance of my mate, we did pretty much a big end rebuild. pulled the rods out and got them checked for bends, etc, but they were all within tolerence. the pistons were all sweet also. we put new rings and bearings in it, new timing belt and all the other shyte. there is no real loss in power (it is a 2.8 Litre, so it never had any power to begin with) the only thing difference is the defening noise it makes. you can imagine the scream it makes on the freeway at 3000rpm... thats why i got such a big stereo.

any more suggestions people?

I wonder if a crack has developed in a piston? Was ok for a while but the shock of sucking in water damaged it & then a crack has come later. Its a bit har without actually listening

i drove the truck for about 200km's after sucking a lungful of water. the noise slowly got worse and worse till we pulled the engine apart, trying to find the problem, alas to no avail...

Sorry about my half finished post, I was interrupted, damn work
Sounds like something else has gone wron after the fact, seen it a thousand times.

my son, I ain't touchin that with a ten foot pole

noises are notoriously hard to diagnose especially without hearing them, but with the knowledge that the motor had a drink and the noise followed soon after, I'd say there is serious internal damage and it's only a matter of time. it could just be valve lash *badly* out of adjustment, or possibly a blocked oilway in the valve gear so one of the lifters is running dry. pop the rocker cover off and visually inspect all the cams and shims for wear, get the feely gauges out and check the valve clearances, then if that's all ok, start wondering about the bottom end. running the motor and removing the oil filler while i's running can give a good indication of whether the noise is top or bottom end but it's not foolproof.

drive it to death.

Remove oil filter to look for noise? wouldn't that just pump all the oil out?

Camshaft1 wrote:Remove oil filter to look for noise? wouldn't that just pump all the oil out?

he said filler not filter

Common to have loud sh1t without serious problems. Might be one of the valve collets has come out or could be a sticking valve or some other noisy issue.

With a bottom end rebuld and replaced injectors cant see much else it could be, it's gotta be worn cam, worn shims, stuffed spring, loose collet or stuck valve.

i don't think its anything major either... so far i have done about 6000klms with the niose and it doens't drink much oil or diesel, it isn't smokey, and there is no real power loss. the only problem is its loud. so i reckon its fine

Check your tail shaft for a cable tie

let's reveiw the symptoms,

Tick Tick Tick
gets faster with speed,
uses no more fuel,
dosen't blow smoke,
sounds like shit,
makes your car harder to sell,
new injectors won't effect it,
neither will rebuiling the bottom end or replacing the timing belt,
there is no "real"loss in power,

I say check your tail shaft
Peter.

i have been the prankster putting the zippy on many a person's truck... its not that, trust me

it does it at idle. it is really loud and pronounced when the engine is cold.

Cracked exhaust manifold?

have you tried a different oil, maybe what's in it is too thick or thin and isn't doing it's job

i might try to get a video of it to put on the net to give y'all an idea of what its like

Hey Mick, were you able to fix this problem?? as mine has developed something similar recently. Thought it was exhaust leak at first but all bolts were tight, changed the oil, still no good but the ticking in my engine varies according to revs & load, more revs & load generally the louder it gets

nah... still got it.

the way i figure, is it doesn't affect performance, it doesn't chew any more oil or fuel than normal, the only problem is it sounds like crap.

i've prettymuch given up on trying to fix it, i've done everything but drop it into a mechanic (who like to try to rape my bank account)

did water enter the combustion chamber when it went for a swim??????
if it did it is possible to have a slightly bent conrod will still run fin slightly lower on compression but the piston taps the crank just.
do a compression test to see if they are all even
ps i have done 3 engines for customers with the same problems

nah its not that v8zuki, because i took all the rods to Mendhams Engineering to get them all measured and tested, and they were all fine. (well within a fly's shit of each other)