Hello people!,

I have just bought a 300zx twin turbo I have owned it for about four days and Im having problems already (not impressed) I toped engine up with oil magnatec 10w-40 a few miles down the road the engine started tapping loudly, I have just flushed the engine and replaced oil and filter but hasent changed this was advised by nissan.

Is there anyone out there that can help me as I have spent every penny on the car.

Cheers and thanks for your help...

I dont know what to say about your tapping problem but if the engine has been neglected your cam belt might snap soon which = trashed engine..

Is there anyone out there that can help me as I have spent every penny on the car.

 

Not the best idea. Should always buy a Zed with a few Ks in the bank as most tend to need something doing to them, especially the TTs.

 

Does it tap all the time or just on startup? Also, (although inaccurate) what does your fuel pressure gauge read when warm?

 

If it does it all the time then it could be a number of things, cam bearing, VTC springs may have broken.

I dont know what to say about your tapping problem but if the engine has been neglected your cam belt might snap soon which = trashed engine..

 

 

 

The car has had a service and cambelts changed I bought it it was fine and about 30 miles later the next day its starts to make a loud tapping noise the bloke who sold it said he has never had a problem with it in 3 years and always kept it serviced and garaged.

Not the best idea. Should always buy a Zed with a few Ks in the bank as most tend to need something doing to them, especially the TTs.

 

Does it tap all the time or just on startup? Also, (although inaccurate) what does your fuel pressure gauge read when warm?

 

If it does it all the time then it could be a number of things, cam bearing, VTC springs may have broken.

 

 

Hello mate,

It does it from start up but when I drive it to work it does die out but if I put my foot down then it starts again or fire it up in morning then the noise is there again.

Could be sticky lifters then. Quite common on these. Do a few oil changes in quick sucession and some nice long drivers. Might clear it up.

 

But if it does it on high revs....could be VTC springs? Duffer knows all about these.

Could be sticky lifters then. Quite common on these. Do a few oil changes in quick sucession and some nice long drivers. Might clear it up.

 

I bloody hope so mate! you make me feel a bit better! just not impressed that iv only just bought it, thanks anyway :)

That's ok. I had to have a complete engine rebuild not long after getting mine. ;)

That's ok. I had to have a complete engine rebuild not long after getting mine. ;)

Can I ask who duffer is? and does he have an email address?

Andy Duff....don't know his email. But he's on the forum. I'd suggest sending him a message, but you're not subcribed.

andyduff the forum whore is who si is talkin about i think

 

theres lots of different suggestions to curing sticky lifters

 

try a good quality diesel engine oil as they have better cleaning and holding properties

try engine flush(forte)

try a pint of diesel in your oil for 100 miles

 

these are all suggestions...choose one that pleases you

andyduff the forum whore is who si is talkin about i think

 

theres lots of different suggestions to curing sticky lifters

 

try a good quality diesel engine oil as they have better cleaning and holding properties

try engine flush(forte)

try a pint of diesel in your oil for 100 miles

 

these are all suggestions...choose one that pleases you

Thanks for that mate, I shall go for a drive first and see if the noise will go?

I have just flushed engine out with wynns engine flush and also added wynns hydraulic valve lifter treatment but made no diffrence.

Personally wouldn't bother with any oil additives.

Personally wouldn't bother with any oil additives.

As I have just found out!!

Personally wouldn't bother with any oil additives.

Sorry mate forgot to add that the oil pressure when warm is about 40-50 psi or a quater of the dial.

That'll be me then LOL

 

Oil pressure should be 60psi @ 3k rpm once warm :)

 

Need a better description of the tapping really. Is it a tapping or a knocking? There's a difference.

 

When exactly does it do it? Cold? Hot? High revs? Low revs? Does it get louder etc???

 

Appologies if you already said above just hard work trawling through each reply to make any sense lol

 

Oil additives aren't really a good idea tbh but never mind if you've already done it.

 

Whats the oil level like on the dipstick?

 

Just a few Qs LOL

 

Cheers,

 

Andy

does any one know if you can change 1 lifter and how much it would cost? and is there anyone who could look at it or fix it cheap I am in cheddar somerset.

Cheers.

That'll be me then LOL

 

Oil pressure should be 60psi @ 3k rpm once warm :)

 

Need a better description of the tapping really. Is it a tapping or a knocking? There's a difference.

 

When exactly does it do it? Cold? Hot? High revs? Low revs? Does it get louder etc???

 

Appologies if you already said above just hard work trawling through each reply to make any sense lol

 

Oil additives aren't really a good idea tbh but never mind if you've already done it.

 

Whats the oil level like on the dipstick?

 

Just a few Qs LOL

 

Cheers,

 

Andy

Hello mate,

Its a tapping sound from top of engine its not deap and it runs along one of the cams but it is loud the oil level is spot on as I have just changed oil and filter. It makes the noise when cold or hot but it has dissapered a couple of times until you boot it or fire it up in morning.

Sounds like it COULD be the VVT springs then. Have a read here:

 

http://www.300zx.co.uk/forums/showthread.php?t=81390&highlight=vvt

Sounds like it COULD be the VVT springs then. Have a read here:

 

http://www.300zx.co.uk/forums/showthread.php?t=81390&highlight=vvt

Cheers for that would you have an idea on how much this would cost? and is it an easy job to do as I have some experience with engines.

Not sure on cost to be honest but can't see it being much.

 

Fan off

Rad out

2 metal coolant hoses from front of engine removed

Remove cam covers

Remove 4x7mm bolts from inner sprockets (be carefull to hold the plate as there is a spring behind it)

Replace spring and o-ring

Assembly is the reversal of removal (in true haynes stylee :D)

 

Doddle :)

Not sure on cost to be honest but can't see it being much.

 

Fan off

Rad out

2 metal coolant hoses from front of engine removed

Remove cam covers

Remove 4x7mm bolts from inner sprockets (be carefull to hold the plate as there is a spring behind it)

Replace spring and o-ring

Assembly is the reversal of removal (in true haynes stylee :D)

 

Doddle :)

Thanks mate I do appriciate this I will see what I can do :)

does any one know if you can change 1 lifter and how much it would cost? and is there anyone who could look at it or fix it cheap I am in cheddar somerset.

Cheers.

you wouldnt want to change 1 lifter, as its alot of removal to get to all 24 ;) and in all honesty you would want to change all 24 :rolleyes: or rebuild them like some nutters might do lol

 

if the VVT turns out to make no differance at all, ATF can help free up a sticky lifter if this is the case, normally a coffee cup amount added to the oil making sure you use dextron iii or equivalant. leave car running for a hour or so and drain and replace with a good quality synthetic oil, otherwise ATF can eat seals if left to long in the engine, just worth a try if andy's suggestion doesnt work ;)

you wouldnt want to change 1 lifter, as its alot of removal to get to all 24 ;) and in all honesty you would want to change all 24 :rolleyes: or rebuild them like some nutters might do lol

 

if the VVT turns out to make no differance at all, ATF can help free up a sticky lifter if this is the case, normally a coffee cup amount added to the oil making sure you use dextron iii or equivalant. leave car running for a hour or so and drain and replace with a good quality synthetic oil, otherwise ATF can eat seals if left to long in the engine, just worth a try if andy's suggestion doesnt work ;)

I shall definatly give it a go if all fails, Thanks!

I dont know what to say about your tapping problem but if the engine has been neglected your cam belt might snap soon which = trashed engine..

 

a noisy lifter does not always suggest the car has not been looked after properly, in can just happen maybe a poor quality oil was added or was not changed at the correct interval, or a clogged oil way?

 

saying the cambelt might snap soon is a bit heavy and probably does not help the guys situation, im sure he can read through the FAQ and make his own mind up on what, when and if it needs doing etc. :)

A sticky lifter will not be caused by the use of a poor quality oil. A sticky lifter is caused by the one way valve being clogged with dirt. This means the lifter doesn't hold the oil inside and does not stay 'jacked out', leaving clearance between the valve and cam lobe, creating a tapping noise as the cam lobe contacts the lifter....