For whatever its worth, just stopped at the Toyo dealer. The shims for the 5SFE for the 31mm buckets are still available. I picked up some the larger sizes since I needed a few various ones of them. I got them for roughly 7.50 each. List is 9.60.
This head is going to be downfall of my motor project I can see it....:sad So I started starting to checking clearances so I can order my shimless buckets. I got through the exhaust side and have really come up some strange results. I started with .285 shims across the board in the buckets. Heres how each bucket fared total. Bucket & Shim 5.3086 5.334 5.334 5.3848 5.3848 5.3213 5.334 5.3086 Clearances .685 .838 .787 .838 .685 .787 .889 .787 Calc'd Bucket 5.743 5.922 5.871 5.97 5.81 5.85 5.97 5.84 So obviously Im staring at these saying WTF?!! The largest shimless is 5.74. Im at a loss on how these are this far off. My only guess is at this point is that since I went to 1mm oversized valves maybe the valves arent recessed in enough? If thats the case, its obviously its not by much...This is a bunch of crap, I dont even want to do the intake because this is making me sick. But Im gonna have to see if they are that far off. :barf
If those measurements are correct I'd say the valves aren't recessed enough and need to go in another 0.5mm which puts you in the middle of the shimless range. (5.2-5.8mm) 2.85mm is the average size shim, check your calculations again as they are 2mm-3.3mm, not .285 or are you working in inches? When they fitted the new seats they may have made them too thick or didn't put them deep enough nb- note the variances in the buckets, you can swap them around to even things out and often if I can't find a shim size I reach for a thicker or thinner bucket
I think thats going to be the verdict. It makes sense since I went to larger valves. At least it is something thats fixable. Im gonna check the intake side tomorrow, so I can have it ready to go to take up the shop on Monday. This will just set me back yet another week. Ill be glad when I get this damn head straightened out.
Ironically, the parts manager I deal with said he just ordered a bunch of of these shims a few weeks ago or so. So, they obviously know how to take care of their engines.
I forgot to put the pic of the inside of Supertech shim under bucket for you Stig. So here you go. Dont mind the assembly oil down inside. I didnt get a chance to clean them off.
Dropped off the head back at the engine shop. No problems they are gonna fix it for me. I went through and made a spreadsheet of all my measurements and how much the valves needed to be recessed to get me in check. Turns out the intake side isnt off nearly as much as the exhaust. The worst offender was only off by .12 mm. So after discussing the measurements with the head machine guy, we decided not to recess the head generically .020. Hes just going to get me down into the upper end of the shimless buckets. His concern was reducing the effectiveness of the flow the head by recessing the valves in that much. Make sense to me. Ill still have my clearances and have a few sizes of buckets to chose from to keep in me in line. Hopefully Ill have it back before the end of the week so I can get my buckets ordered and get this thing put together.
I'm glad they agree, my only concern is that if they are at the upper limit you won't be able to able to re-shim. At least with shims there are places that will make larger sizes for a few extra bucks. Looking at the buckets I can't see why it would'nt be possible to weld the pin and re-size them
Dont forget Im going shimless...so if I go back out of range it will require more machine work to the head. So I think he will probably go as far as he can which will give me a little more leeway on the shimless bucket sizes. Hopefully they will get it done tomorrow. I definitely glad I did my homework before I took it in.
Thats what I'm getting at, when you run out of sizes you'll have to weld & cut the buckets or take the head out
