Polly mounts fixed all with my Kooks LT's and Y

 

before the cam i never had the issue. now that i have my cam it does it only sometimes in reverse. but nothing thats not tollerable.

 

all the guys with banging y's, you need to order up some prothane engine mounts to get rid of that banging y!!! it will be a pita to install but which is worse, listening to the y pipe bang or not?

 

I bought my Kooks lt's from a Ls1 tech sponsor. They never informed me about poly mounts and y pipe banging until after I had the headers installed! I would have had the poly mounts installed when the headers went in!

 

My QTP Y after Poly mounts still hit the end of the trans crossmember so I changed my mounting arraingment to LT1 style and now the pipe is clear of the trans crossmember and never bangs. Heres a pik of it done...


LT1 style crossmember installed.

Everything back together.

What it looked like without the crossmember bolted up. Top bolt holes are the new ones bottom set are the LS1 holes.

 

excuse the dumb questions , are poly and prothane mounts the same? either will fix the banging?

 

yes it is the same..prothane is a company that makes poly(polyurethane) engine mounts...in most cases it will fix the banging probem caused by the crap for engine mounts in the fbody...the best time to install these motor mounts is when the headers are off, so most ppl will do a header/engine mount swap..the motor mount kit is only $60 and some change at ws6store.com

 

cool, thank u very much

 

I've got Pasetter coated headers and their ORY. It used to bang only on acceleration. I bought some heat wrap and wrapped it around the part of the Y pipe that was bangin under the drivers side floor board. I then took a piece of heater hose and spliced it down the center and clamped it on top of the heat wrap and y pipe. Doesn't bang at all. Been that way for about 2 years now.

 

hmm thats probably easier than installing motor mounts.....

 

true, but that sounds like such a ghetto fix....it is going to be so much better to just get prothan mounts...especially when you start putting more torque to the ground, it is only going to help that much more

 

spohn solid motor mounts and no banging here. slight vibration but after all, it is a muscle car. if you don't want vibrations, don't mod the car or buy a luxuryc ar.

 

I have a tsp ory and had to take it off and egg shape it in one area and put a dent in another to keep it from hitting. My car is pretty low though so I couldn't just adjust it. I had their cat Y on it and had to take it off because it was banging on the floor and scraping the ground.

 

Is it true that this banging can activate knock sensor??

 

Damn, I must be lucky. Kooks and Kooks Catted Y, Heads and Cam and no banging. Still on 8 year old factory mounts and 54K miles.

 

Like stated a bunch of times in this thread motor mounts are almost always going to fix the banging issues. Either way they're a great mod, they allow for smoother shifting for M6's and keep everything in place. I just installed my Spohn solids and I love them. I get a slight rattle from the y-pipe but that's only because it lifted that side up about a 1/4". Get some motor mounts, solids and Prothane's, and kill two birds with one stone. They're really not hard to install. I got worried after reading all these threads about them being a nightmare but it was really easy.

 

^^^perfectly said

 

replace your motor mounts and you'll never look back!

 

i wish i read about the y pipe banging issue before i installed my lts.

so for those who have done it, how hard is it to install motor mounts with lts in?

 

It is...but I would still get the motor mounts.

This "Ghetto Fix" that I gave you was really only a short term solution to hold you over until you can get poly motor mounts. I'm just a slacker and never got back around to installing some

It works fine, but just like most have said the motor mounts are probably the "Best" solution to the banging.