Hi All, As above, does anybody know the specifications of a 355 Valve Springs (both inner P/N 149889 and outer P/N 149888)? Thanks in advance
You do know that there are two springs on one valve don't you? One sits inside the outer spring. I could not remember of the top of my head the height mate, but I looked in the WM. The outer spring height is 36.0, the inner spring 33.0. While your heads are of, check your valve faces carefully. I discovered that one of mine had a crack in one of the exhaust valves. there was only one but you never know how many out there that might have one or a couple. The picture shows the crack on the left valve, the one on the right was one of the new ones. Hope this helps Image Unavailable, Please Login Image Unavailable, Please Login
Yes, and if you do download it. Don't necessarily take every it says as gospel, it's got quite a few inaccuracies,vague info and at times strange translations. So check other sources, although its hard to get clarification from anyone other than has actually done certain jobs. Good luck.
Thanks for all your help - I'll be sure to download the workshop manual. Dino Chang - I will be replacing the valves anyway with some much better quality bespoke items but it will be interesting to see the condition of the existing valves. What I really need is: (1) Inner dimension (2) Outer dimension (3) Force required to keep the valve closed (Preload force) (4) Force required to maintain accurate camshaft tracking at high revs (5) Seat pressure (6) Open pressure (7) Max lift
What you REALLY need is that workshop manual. Trying to get that kind of specilised info from here is like blood and stone because only the very few will know that of hand. The manual covers spring loads ect, can say I have ever spotted inner and outer dimensions though, only spring coil thickness. Interesting that you say you are replacing your valves with better quality bespoke items. Are you turning them your self from a specific material? Or buying a particular brand? My final question is, why are the new valves you are fitting better, have you had some fail? I replaced all mine with new ones but they were of the shelf. Hope you answer
The workshop manual download keeps failing. I'll try again later. I'm considering different materials for the intake and exhaust valves with an engineering firm - the reason for not going with genuine items are: material used, weight, durability at high temps. I think the weight saving will be most beneficial. We only really want to do this job once.
The specific metallurgy of the guides is the most important aspect of this job aside from making sure they are honed to correct clearances. Lots of good information on this subject.
I have a 360 engine apart right now, I can measure the inner and outer springs if you still need the info. The valves and lifters are the same, I would think the springs are too
Metallurgy and hone of the guides have nothing to do with weight. Guide material may help slightly with ability to handle greater thermal loads, but it would be such an insignificant difference he'd never see the change in a practical application.
Thanks for the offer, but looks like Mr Phillips has come to the rescue. Once again, thanks for all the replies.
