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Hmm yes they went faster as I moved along, but I hadn't done it before.
I have duals too. You don't need need to the tool to compress them they're soft enuf to just press them down w/ your hand while you put the keepers in. You just need to make sure you compress the outside spring as much as possible so you have a lot of slack to play with.
If Bill says it's OK, then I'm sure it is OK, but I too wonder about the extra mass and how it works with the higher red line and possibly more aggressive cam profile and stiffer springs. For now I'm content to inspect the OEM retainers when we change the oil, and unless we start seeing catastrophic failures in cars that haven't been over reved I'm sticking with that program. This latest find concerns me, because the cracks are so small; I'd feel better if we had some idea of how much longer they'd have gone before failing. If the small cracks grow slowly then periodic inspection is sufficient, but if a small crack can translate into a dropped valve without any other warning then periodic replacement might make sense.
Bill, have we actually seen cars dropping valves without ever having been over reved?
I brought my car to Bill before the end of the summer this year and if I can remember correctly I had 6 cracked retainers. The cracking was not from me because I had never over revved the car. Here is a picture of one of my retainers with a crack slightly longer than that of the original retainer in this thread. As of now I cannot report and problems or valvetrain noise with Ap2 retainers and keepers. I will bring the car to Bill in a while for him to have a look at them.
there are also brian cower retainers and springs, i am inclined to just buy the ap2 retianers and springs but i want to make sure they are the way to go. for a supercharged application will the ap2 parts still be my best bet? thanks
CHRIS.
I brought my car to Bill before the end of the summer this year and if I can remember correctly I had 6 cracked retainers. The cracking was not from me because I had never over revved the car. Here is a picture of one of my retainers with a crack slightly longer than that of the original retainer in this thread. As of now I cannot report and problems or valvetrain noise with Ap2 retainers and keepers. I will bring the car to Bill in a while for him to have a look at them.
Tachamp, I appreciate your input. Many of use are interested in this (for obvious reasons), so I hope you don't mind if I ask a few questions.
Did you buy your S2000 used?
If so, was this the first "keeper inspection," since you got the car?
Can you eleminate the possibility of an over rev by a previous owner?
I'm thinking about Modifry's experience here. 180,000+ miles, first with nitrous, and then SC/AC, and no retainer problems. He both autocrossed and tracked the car, and I think he drove it pretty hard, pretty regularly. Are we seeing failures due to production variances, or is there always an over rev or some other factor that is common to all the failures? For example, have we seen failures in cars that are autocrossed by guys who sometimes ride the rev limiter to avoid a shift? I don't baby my car at all, so unknowns like this always concern me a little, in spite of the fact that we're inspecting the retainers every 3,000 miles.
From what Bill has said in other threads, I don't think the weight difference in retainers is enough to matter, and obviously that's what Bill thinks, or he wouldn't be installing them in people's cars. I guess at this point I'm more interested in understand whether or not the stock retainers fail without some kind of "abuse," but there is a lot of interest in this "mod," so keep us posted.
This one was from a local kragen's but basicly yes its the part from a leak down tool. My compression tester doesn't have a fitting that would fit on my compressor.
Sorry.