crower cams hitting the tapits - Honda Prelude Forum

linkin · 04-30-2007, 05:55 PM

I have stage two crower cams with dual vaulve springs and the cams are hitting the tapits. im sure its not supposed to do that. whats wrong?

71dsp · 04-30-2007, 06:09 PM

What are the tapits? Do you mean the rocker arms?

Are you using the Crower +0.060" installed height valve springs?

marcucci · 04-30-2007, 07:43 PM

Tappets = rocker arms.

See Billy's response. No, they are not supposed to do that. They should only make contact with the rocker pads and not the "tappet" portion (valve lash adjustment screw or rocker arm).

FirFitazLude · 04-30-2007, 09:42 PM

Mine were tight. The feeler wrench would not even fit between them during the valve adjustment. Had to file the flat portion of each rocker arm.

Same set up, Crower stage 2 and Crower valve train.

marcucci · 05-01-2007, 06:31 AM

Whoops, sorry, I had completely forgotten about this. The Crower retainers require clearancing of the rocker arm for proper installation. It has nothing to do with the cams themselves (if this is the issue, and not the cam hitting the rocker arm).

FirFitazLude · 05-01-2007, 07:57 PM

Thats exactly it the Tit retainers are too thick.

71dsp · 05-01-2007, 08:10 PM

They're not too thick, they have an installed height 0.060" higher than stock, so the retainers hit the valve rockers.

FirFitazLude · 05-04-2007, 07:17 PM

ok

fastkill · 05-05-2007, 09:26 AM

so what is the solution on this? crower is actually sellin a drop in product combo tha needs to be modded to work correctly?

71dsp · 05-05-2007, 11:54 AM

You need to grind the rockers for clearance.

FirFitazLude · 05-05-2007, 03:43 PM

Your right about Crower, but the modification really is short and sweet.

akber · 05-05-2007, 05:21 PM

uh oh. i never got my motor cranking. ive got crowerstage 2 trbo cams with a kms valve train. will i have this problem?????

its just been so long since my motor was built i dont recall any of the specs......agh its a complicated situation, i dont even numbers or measurements written on paper. Shop closed while my car was still in progress. Had to pull it out and all this and that ugh

marcucci · 05-05-2007, 08:49 PM

I would highly suggest you have another builder that's knowledgeable take it apart and clearance everything. If you know it was a simple build, like a resleeved bottom end, lower CR pistons, and turbo cams plus beefer valvetrain (i.e. no radical timing changes, higher CR, wild cams) you should be OK. It's probably not worth risking it, though, especially if the shop closed in the middle of the build and there's no guarantee they did it right.

akber · 05-06-2007, 03:38 AM

man this project is already costing an arm and a leg, its becoming very difficult to pull through without cutting corners. Especially cuz studies are just killing me, i have no time to work anymore.

AliKhan · 08-22-2008, 05:30 PM

Bringing this back up... When you folks are saying to grind the rocker arms to clear the retainers, how much exactly are you grinding away? The whole 0.060in (1.524mm)?

I just got crower stage 2 cams and valve springs with ti retainers (from todd). The engine isn't going into the car for another 5-7 days, and it seems like I should be doing something about this issue before I turn the motor!

I'll also mention that I have a CRAP load of tools and toys in my garage, and I like to say I'm a darn good do-it-yourself guy (I know, spare the modesty), but I'm afraid of grinding away too much and sacrificing the structure of the rocker. There isn't all that much space from the outside of the rocker to the inside of the vtec piston.

I guess I'd feel more comfortable knowing how much to, or not to shave the rockers.

AliKhan · 08-24-2008, 02:09 AM

Nobody eh?

I guess it's something everybody's supposed to know :P

I took the initiative and just ground down the rockers myself. Not the best job I admit, but I'll post up some picture in the next day or two.

I even got a little carried away with the grinder on one of the vtec rockers... to a point that's kind of worrying me.

Does anybody have pictures of their ground rocker arms for the h22? It'd be nice to make a comparison.

**pics coming real soon!**

dvsracergirl · 08-25-2008, 02:08 PM

ali.... its nat

if i can salvage anything from my old laptop i have the picture that brian crower emailed me....hopefully i can get stuff off of it

2000h22a · 08-25-2008, 02:58 PM

lucky i saw this thread, just got these from todd the other day lol

dvsracergirl · 08-26-2008, 04:14 PM

that looks pretty close to the one that brian crower sent me.

vinuneuro · 08-26-2008, 04:45 PM

Having to modify rockers to run certain valvetrain is ridiculous. Especially considering you don't have to with other brands; and even more so considering that Crower cams aren't that impressive, at least with the H22.