Ticking Injectors / Lifters

[Topaz]

Hey all,

Short Story - my car was tuned recently, inectors are at 90%.....told you it was short.

Now, I am planning on getting Nismo 600cc injectors fitted but will this stop the ticking I am getting at the moment? Are mine currently ticking because they are at 90% load or is it because the lifters are dirty?

Its pissing me off yes

cheers.

[djr81]

Hey all,

Short Story - my car was tuned recently, inectors are at 90%.....told you it was short.

Now, I am planning on getting Nismo 600cc injectors fitted but will this stop the ticking I am getting at the moment? Are mine currently ticking because they are at 90% load or is it because the lifters are dirty?

Its pissing me off yes

cheers.

Bloke - it is an RB26, with a mechnical (ie not hydraulic) valve train. It's the valve train. They all do it.

Be proud of what you have.

[ferni]

Injectors at 90% means you still have 10% left

If they were at 100% then i'd be worried....

[Primordial]

Haha yeah.. 10% left!

It's probably not smart though, as leaning out at parts of the rev range is a likely event.

[Topaz]

Bloke - it is an RB26, with a mechnical (ie not hydraulic) valve train. It's the valve train. They all do it.

Be proud of what you have.

MAKE IT STTTTTOPP!

So bigger injectors still have no affect? and its not because its dirty/sticky?

[PHATR32]

my injectors tick like spastic too, but my mates ones dont, so its not a rb26 thing. (maybe for the 15year ones it is)

steve

[Primordial]

My RB25 is very ticky.. I've got bigger injectors on there too.

Some days it's louder than others...

[_8OO5TED_]

tick tick tick tick !!BOOM!!

[Topaz]

tick tick tick tick !!BOOM!!

Pump it up Prince

Its very embarissing driving a GTR that sounds like a diesel truck going passed 2500rpm . Driving passed train stations in the morning I try to keep the revs at idle, coz I know all the people are looking at me .

[_8OO5TED_]

geez, is it really normal for it to be that bad? my cousins '89 GTR does tick but its not so loud that everyone turns and looks!

You sure they arent just looking because its a Skyline?

[Primordial]

woah.. yeah mine isnt that bad.. thats some really loud ticking! I meant you can hear mine if you are standing next to the bonnet or have the bonnet up... but not driving past!

[Topaz]

Maybe its it coz its a Skyline...

Yep, shes a whinging little bitch my engine, its fine at cold start but when the engine starts to heat up in the morning it ticks very loud. Then when I drive home its a lot quieter, almost silent.

[michael87]

Sorry to hijack the topic topaz,

I get a ticking noise in the morning or when the car is cold, the ticking increases with revs (mainly around the 2000rpm-3000rpm) after 3000rpm it cant be heard. Once the car has warmed up the noise dissapears. I was wondering if anyone can suggest a way of fixing it, it drives me nuts.

My car is a R33 GTS, i was wondering if it could be just the injectors or the lifters (or a broken lifter).

-cheers, michael

[insu]

Sorry to hijack the topic topaz,

I get a ticking noise in the morning or when the car is cold, the ticking increases with revs (mainly around the 2000rpm-3000rpm) after 3000rpm it cant be heard. Once the car has warmed up the noise dissapears. I was wondering if anyone can suggest a way of fixing it, it drives me nuts.

My car is a R33 GTS, i was wondering if it could be just the injectors or the lifters (or a broken lifter).

-cheers, michael

It sounds like your problem is more to do with lifter noise, specifically lack of lubrication at cold start.

This could be due to lack of oil, or more likely due to the fact the problem dissapears when the car is warm: Worn lifters or oil that is too (thick or thin) in its cold state.

What rating oil are you using and how many k's has your car done?

(BTW doesn't sound like a broken lifter, this would cause the noise all the time, probably alot louder as you rev).

[michael87]

car has done roughly 117000km

oil im not entirely sure about, got my mechanic to change it last time, i think its shell synthetic possibly 5W-40?? (it was changed about a month ago and still looks really clean

could you suggest an oil i should use

-michael

[michael87]

**bump

[MIVEC]

Lifter noise in FTO's is a common thing (most Mitsu's actually) and is often stopped by adjusting the lifters clearance, dunno if you can do this in the RB's but maybe look into it?

The type of oil you use also makes a difference.

[insu]

Hey Micheal, sorry I didn't post back. I've been away on hols. Plus i'm trying not to hiijack this thread, but it looks like its too late for that so:

Now i'm not a mechanic so don't take this as gospel, but basically, skylines use hydralic lifters which as the name suggests, uses oil to fill the lifter.

When yoy stop your engine any one of your lifters on the camshaft lobe is under pressure of the valve spring; therefore a leak from the chamber can occur.

This is normal, and if you haven't driven your car for say 3-4 days and start it up, you'd expect to hear lifter noise for about 10 seconds or so as the fluid fills the lifters.

Now as a car gets older and the engine wears its normal for tollerances to become larger, that is why as your car gets older its a good idea to change the viscosity rating to suite the current condition of the engine.

Basically the older the engine the thicker the oil.

From the factory skyline ran a semi-syn at 7.5w, most guys on here (and it sounds like you too) Run a 5w fully syn, which is fine and probably better for the engines internals and turbo etc. But if you're really concerned about your cold weather starts on the lifters, you might want to consider running a slightly thicker oil, say 7 or 10w as this oil might take a fraction longer to reach the galleries, but fill them and operate a higher viscosity from start thus filling the lifters faster.

Beware though, because this might not fix your problem, there is always the chance you have problems with sludge build up, either in the oil pick up sleeve, or galleries. This can cause oil starvation until enough oil finally enters the lifters for them to work properly.

This is probably less likely though.

I'd get in my car and start it cold and keep an eye on the oil pressure gauge and see if it shoots up pretty much straight away. If it does you'r oil pressure should be good, and at least you know thats not really the problem, if it delays or stays low and takes a while to raise in pressure, this would suggest a worse problem then just clearance issues.

In the end, your mechanic should be able to advise you on the best cause of action for your car, obviously there could be other factors.

It might be an idea to leave your car with them overnight so they can to a true cold start and see how the car behaves.

Hope all this jibberish helps, and again as I said i'm not a mechanic.

Sorry to Topaz btw for hijacking this thread.

-Insu

[insu]

Lifter noise in FTO's is a common thing (most Mitsu's actually) and is often stopped by adjusting the lifters clearance, dunno if you can do this in the RB's but maybe look into it?

The type of oil you use also makes a difference.

I'm reasonably sure that the RB25's lifters are self adjusting.

Oh and BTW michael, i'm not sure if I mentioned it, but the downside to using to high a viscous oil on start up can be that the oil it harder to move and takes longer to fill the lifters, which can be worse. So don't go to thick.

Also, there are other things that can cause a ticking when the engine is cold such as a crack in the exhaust manifold that expands and closes once the car is warmed up etc...

[michael87]

thanks for your help insu, ill check them out tomorrow.

sorry topaz for hijacking

-michael