Valve Sping info?

[jrc90240sx]

Ok say you have valve springs, stock original with 130k+ miles on them. you upgrade your cam, rebuilt the head, and replace your lifter/rockers, but still used the old springs. could they case a tick/tap sound. say as they come off the cam lob they flot, and then tap agenst the cam posably creating the lifter sound?? what do you all think? really looking for info to getting my car running smooth. thanks

Joe

[jrc90240sx]

doh, posted in the wroung place, sorry guys. oh and flot=float

[TomsMR2]

unless you have a pretty high lift cam, id say replace the springs with new OEM. the valves only float at high rpm, or if your lift is really big.

[jrc90240sx]

Well then i dont know whats makeing my nose, because its there at idle. the Cam is JWT cam, so its not wild. hum i dont know what to do, stupied car.

[:: orion ::]

IIRC the SOHC has hydraulic lifters...so low oil pressure at idle sounds like the culprit.

Have you checked to see if the oil pressure is within spec???

Let us know - Brian

[jrc90240sx]

Yes, oil pressure is corect, i am running 25-50 oil.

[jrc90240sx]

I think i am just going to pull the head apart saturday or something and maybe see if any oil passages on anything are cloged

[sil80drifter]

25w-50? what the heck? why?

sil80

[TomsMR2]

yeah... thats some mean oil.

[jrc90240sx]

well we thought that maybe a heavier oil would helpincress oil pressure and stuffplus it protects better so tell i get it fixed i dont want to risk running a low, well maybe a 10-40 but no lower. plus i autox with my car so i am going to need to a heavier wieght oil to help protect when i am reving high and often.

[WDRacing]

On my NA motors I ran 0W-30 Mobile 1 Synthetic.

[sil80drifter]

I dunno bout the heavier oil being better for auto-X. I know quite a few people who are running 10w-30, and close to that, both synth and non synth. But I know very little about the subject, so I cannot comment either way, just relate to what I see around.

sil80

[Pornflakes]

Use always the thinnest oil you can for the application (thinnest oil the application requires).

Thicker oil protects better, but also has more trouble getting to the part(s) where it's needed. Every application has a sweet spot between thick and thin oil. I usually run 10W30 for almost any application unless something specific is required.

[jrc90240sx]

Yeah, well i went and talked to the guys at the machine shop, and looks like some of the new rockers/lifters are not working coreclty (about 2-4 of them), so looks like i am going to swap them out and see what happens. oh, and its getting to about 95-100 degres out side right now, and is not getting below 60 at night, so i am sure the 25-50 is ok. next oil change i might go back to the moble 0-40.