My plan is to re-use the stock rods and wrist pins. I'm going to send them to Pampena and let the press the pins in and send me ready to install piston / rod assemblies. See a problem with doing that?
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My plan is to re-use the stock rods and wrist pins. I'm going to send them to Pampena and let the press the pins in and send me ready to install piston / rod assemblies. See a problem with doing that?
Nope. You'll be fine. That's the other option which is just fine. It's more work to have done but is the cheaper way to go. I don't like the pain of sending it to a shop to take apart but that's just me.Quote:
Originally Posted by Jimvr4
My thought is to minimize the local machine work since nobody around here ever works on a 3S motor. If there was a problem with another shop breaking Ray's pistons it would suck.
Double that on possible out of round. My block looked good and honed good but had some cylinders mic out as not being round. Rods should be checked to make sure none are bent too.
OK, I've finally dismantled the heads and found the reason my engine would turn over with high resistance. Cams, cam gears, rockers, lifters are all out. The rear head was fine but the front head has a problem. One of the exhaust valves on #3 has a jammed rocker and the lobe on the cam is all gouged. I had to pry the rocker out of there. When I did so the lifter extended and it cannot be compressed with normal force now. I checked the other lifters and an exhaust valve on #5 also won't compress. Interestingly, this corresponds to the broken valve from #5. This is NOT how a rocker should look:
http://jns.jimnshar.com/40f00ab0.jpg
I suspect this was caused by a stuck lifter. These big bore lifters have been installed only 2 years and have less than 10K miles on them.
AHA...we knew there was a problem somewhere, good job on finding it!
There's probably nothing wrong with the lifters... It's not uncommon to not be able to compress them if they still have oil in them, and are pumped up. Take a thick wire or small allen wrench, and stick it down the hole in the lifter to release the inner valving.
A stuck or abnormally pumped up lifter would simply hold the valve open and cause a misfire... The reason your rocker fell out is because the valve stuck in the guide, and there was no spring pressure to hold the rocker in. That most likely happened because the valve was superheated by the meltdown your motor was going through at the time...
Makes sense Larry. Need to find a cam and rocker now.
$260 factory fr exh cam
$21 factory rocker
Thats pretty painless:)
When you pull the cam sprockets, I would recommend a wrench on the cam hex & an impact gun to loosen- the large base flange on the bolt ( @ 65 ft, lbs.) can pull on the sprocket while loosening slowly (with say, a breaker bar) and damage the tiny cam dowels, or moreso the dowel holes in the cams. There is minimal material around the dowel holes (where the dowels are located in cam) & they can elongate easily.
Where did you get them?Quote:
Originally Posted by Jimvr4