Hytech replica header help - Honda Prelude Forum

aznjap808 · 10-20-2009, 04:51 PM

Just installed my replica header and the shop that installed it, used a torch to cut the crossmember. My problem is whenever i accelerate, even a little, i feel and hear something knocking. My first thought is that they didn't cut enough of the crossmember. As soon as i push the pedal, there is a rapid knocking noise and i can feel the vibrations through the pedal. Under idle and braking, everything is fine. Any ideas?? heres a picture of the crossmember

Kronn 98SH · 10-20-2009, 05:48 PM

You're right. They didn't trim enough. It's banging when the engine torques.

aznjap808 · 10-20-2009, 05:51 PM

Dammit i knew it, is there anyway i can just cut a little more myself w/the header still installed? I'm guessing i'd have to jack it up and do it from underneath, so what would should i use?

Kronn 98SH · 10-20-2009, 05:53 PM

When mine was installed, I had the same problem. They didn't cut near enough. I took it to my local muffler shop and had them remove s'more with a torch.

aznjap808 · 10-20-2009, 05:57 PM

Alright thanks Kronn, always helpin me out haha.

pIERCE · 10-20-2009, 09:58 PM

I hat to ask,,,but being the devils advocate.....

If there is that much torque on that crossmember....is it a good idea to take some the material that helps its integrity?

aznjap808 · 10-21-2009, 02:32 AM

^^ wait, what?

Kronn 98SH · 10-21-2009, 07:00 PM

Quote:

Originally Posted by pIERCE

I hat to ask,,,but being the devils advocate.....

If there is that much torque on that crossmember....is it a good idea to take some the material that helps its integrity?

The engine is torquing, which sends the header forward, which hits the stationary crossmember.

pIERCE · 10-21-2009, 11:38 PM

Got it. Sorry for the confusion there...

fivespeed · 10-22-2009, 02:11 PM

would it suffice to just get motor mount inserts, a torque damper, or solid motor mounts instead of cutting more of the crossmember?

aznjap808 · 10-22-2009, 04:28 PM

Well you're going to need to cut it no matter what. It's flush with the cross member installed. You probable don't need to cut it as much as I did with aftermarket mounts and stuff, but you're going to need to cut it at least a little.