Jump to content
SAU Community

Rb25 Lifter's With 90pound Valve Springs

SATO GTS

By SATO GTS,
in Engines & Forced Induction

 Share

Recommended Posts

SATO GTS Community Regular

SATO GTS

Posted
Posted

hey all

after having my 25 rebuilt and with the intention of installing hks 256/8.8 mm in let and 264/9mm exhaust cam my engine builder instructed me to install 90 pound spring to help with high boost and valve float when larger turbo will be installed so i thought ok go for it.

the problem that i am having now is that after a while when the motor has not been run on initial start up the hydraulic lifters are noisy. engine has been run in and being driven every day with good quality oil. has any one else experienced this problem b4? are there any other causes that would be making this problem evident?

msnismo Grand Master

msnismo

Posted
Posted

Lifters weren't bled when put in by the sounds of it.... assuming there is no oil supply problem to the head???

Mine were noisy as a mofo for the first week on cold starts.... now I only have a slight noise(one stubborn lifter) which is slowly disappearing... been around a month since mine turned key on the new engine..

U can run a thin oil and take it for a nice long hardish drive and get some oil up into them.... ie high revs... low gear ... under speed limit of course for an hour or so :)

oooooooor take it to a track day and give it a good work out :)

T04GTR Grand Master

T04GTR

Posted
Posted
were your lifter replaced when you put the cams in? if not, how many hms do they have on them?

im assuming your engine builder checked the clearences and just didnt slap them in the head

wasnt aware you can "adjust" the clearance of a hydraulic lifter.............

they are very hard to bleed, and most peeps dont really want to pay for new lifters.

as above what anna said :)

SATO GTS Community Regular

SATO GTS

Posted
  • Author
Posted

the lifters where soaked in oil the hole time the engine was apart for roughly 3 months .

the engine has been running for about 4 months now and still the same.

yes the price of new lifters is way to much atm .

the engine originally done some very high k's

  • 3 years later...
75coupe Grand Master

75coupe

Posted
Posted

well Im assuming they would of been cleaned, but Im concerned the 90lb springs arnt helping with allowing the hydraulic lifters to function, not oiling up as soon as they could....

90lb is a heavy valve spring yeah???

75coupe Grand Master

75coupe

Posted
Posted

Im not sure of the brand, 90lb is alot, performance springs dont even know where they would find a 90lb spring to fit....

65lb was recommended... 90lb will cause lifter issues apparantly...

SATO GTS Community Regular

SATO GTS

Posted
  • Author
Posted

Yes they do say couple mins at warm up stage then all goes quite.

Its just the noise that is annoying.

Confirmed with machinist about spring tension and they are NOT 90 Pounds .My bad for the incorrect info.

They are 65 pound springs as he has installed them in other 25 heads with no problems, it must just be the lifter's worn out and not sealing the

oil in the lifter.

New Lifters a must.

Other then the lifter problem, all is sweet.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Black_CSR
      Wheel Sizes & Offsets For Skylines

      By Black_CSR · Posted

      Yeh I think i'll message an old contact i had for ages that manages his own tyre shop now.. n tell him what i want n work with him before ordering..  Got this 17x9 +30 Driftteks on 245/45/17 PSR Drag Radials on the rear.. They fit well - for your reference in future - Rear guards  have been lipped in & minimal to non flaring of the rear Gaurds.    
    • Kinkstaah
      Wheel Sizes & Offsets For Skylines

      By Kinkstaah · Posted

      If only it were that easy! I also needed to remove seats, shocks, brake calipers, send my car through a fence, and use measuring and ended up guessing because I didn't remove seats, shocks and brake calipers. It can be hard sometimes Can be a little more complex than 'just measure' if you want to truly measure the entire wheel through all of it's suspension travel. But if you aren't going for every last mm then yeah, you can check the space you currently have and guesstimate.
    • GTSBoy
      Wheel Sizes & Offsets For Skylines

      By GTSBoy · Posted

      If you own a car, and it has wheels on it, and you know the offset of those wheels, and you have a measuring device, you have everything you need to work out if other wheels will fit.
    • Black_CSR
      Wheel Sizes & Offsets For Skylines

      By Black_CSR · Posted

      Will this fit? but they are staggered set - RAYS 57DR SEMI GLOSS BLACK 18x8.5 +37 | 18x9.5 +38 5-114.3 STAGGERED SET   or If no go could just get a set 4's wheels of 18x8.5 +37 5-114.3 - would i run 8.5's 235s up front n 245's at the back if I do?   Thanks.        
    • MBS206
      MAJOR FUEL ISSUES 25det neo r32

      By MBS206 · Posted

      Put a clamp on your return line. I have a feeling it's sucking air, and introducing bubbles to your fuel. With a lot of fuel, less problematic. I'd honestly be redoing all the lines in the tank and clamps on everything.   Also, you've given two different answers to the same question: Asked if being followed by the police you could get down to use the whole tank, you said yes you could, so long as you keep off boost. However, you then followed this up that free revving, it would also cause the issues. I'm doubting free revving is enough to make any noticeable boost on what is likely a decent sized turbo.   So now I have to ask, can you actually drive it lightly and use all the fuel, or does it break up even free revving? Also, have you put a fuel pressure gauge on it? Can you hear the pump change noise at all when you're having this issue?
×
×
  • Create New...