Rb26 Solid Lifters

[4drlvr]

Hi Everyone,

I just wanted to know if any one else out there that has got forged internals with an aftermarket cams which havent been dialed in, in their rb26 which have noisy solid lifters.

Is there anything that can be done to quieten them. The engines only done 8000kms after a rebuild so im not sure if that has anything to do with it.

Ive asked my mechanic about this but didnt really get much of an answer.

Anyone had this before??

[DAS KAMU]

Hi Everyone,

I just wanted to know if any one else out there that has got forged internals with an aftermarket cams which havent been dialed in, in their rb26 which have noisy solid lifters.

Is there anything that can be done to quieten them. The engines only done 8000kms after a rebuild so im not sure if that has anything to do with it.

Ive asked my mechanic about this but didnt really get much of an answer.

Anyone had this before??

all the gtr's ive heard including mine sound like that

[sh@un]

drive the car harder and reduce the clearance gap with some heat induced metal expansion. lol

can't really do anything about it- that's why nearly every other engine (designed for commuting) you care to mention has hydraulic lash-adjusters

but it's not like they're that noisy. makes the engines sound tough anyway

[Godzilla32]

Get them properly shimmed. A good shop will actually shim it down by a couple of thou over factory and quieten it slightly. A positive of this is slightly more valve lift also.

[GTAAAH]

yeh like godzilla32 said you can get em reshimmed and they'll quieten down, mine used to be insanely loud but i can barely hear them now after they were reshimmed while engine was being built.. think i got quoted something like 600-800 just to do lifters tho at some stage

Edited October 16, 2008 by GTAAAH

[4drlvr]

Hi Guys,

Thanks for the reply, but is it a real big job to get the solid lifters re-shimmed??

Also ive been having another issue with the car not sure if i should start another new topic or not but here goes.

If i rev the car and let go off the accelerator, revs come back down to the normal idle rpm for a split second and then drops down further to about 500rpm sometimes turns off and turns back on and then goes back to normal idle rpm.

Now ive checked with the mechanic and hes told me its because ive not no return valve or something or the other and theres too much return pressure of sumting. Hes checked all cooler piping, vacuum hoses and afm's and its still doing it.

Mechanic's however told me that a pfc jetro will get rid of the issue coz it wont be running afm's.

Any ideas on what it could be?? Could it be due to a conversion issue, the car originally had an rb25det with an auto and now has a rb26dett with forged internals, cams that havnt been dialed in as yet and r34 gtt gearbox running in it with stock ecu???

[GTAAAH]

Um no return valve he said?, has it got an aftermarket bov or something? or is the recirc pipe missing off the bovs? because if that's the case and it's dumping to atmo that will be the cause of the stalling and you will need to get it tuned, via a pfc or a remap to fix it..

[Godzilla32]

Sounds like vacuum leak. A non recirculating blow off valve will give you the same results though. Check everything behind the throttle blade to make sure you dont have a vacuum leak and if you do have a atmo venting blow off valve try recirculating it and see if the problem goes away. He's right though the PFC D-Jetro will eliminate that problem.

[4drlvr]

Hi guys, yep it does have an aftermarket bov only one though. There is a small black pipe going into the bov and another one just blocked with a screw, i think dats if u have 2 i assume??? I just double checked the back of the throttle bodies and all seem to be connected fine. So in other words i cant do anything else but get a pfc or get it remapped is that correct??

[doo doo]

Just re shimmed my head, took a while- if you do your own let me know and I'll give you a number of a guy in melbourne who makes these shims- much better than nissan and half the price- about 8.50 ea (0.2mm case hardened as opposed to nissan's 0.01, and they come in 0.2mm variations, so you'll be able to rub them down for tolerance fit- you can't do this with nissan ones). They're on the shelf too so overnight delivery as opposed to 4 week wait out of japan.