hey has any body with 9s had a problem with the cosworth exhaust cam??? mine was to big and it was pushing the valves open and they would get stuck the a couple sec later pop up. So i put the stock exhaust cam back in and the car fired right up no problems but now the car is misfiring at low rmps. the intake cams works fine i still have it in

 

That's weird, I haven't heard one thing about Cosworths not fitting properly. Are you sure you installed it correctly?

 

yes i installed them correct the cam was too big and the valves would stay open.

 

Did you bleed the lifters?

 

if you install the cams correctly you wont have any problems... start from there!!!

 

What size cams? Using the stock valve guides?

 

did you put it in the cam dowel in the dsm hole or the evo hole...just an idea

 

your funny hahaha.... they were installed correctly the exhaust cam was to big for stock valve train. it push the valve down so far the spring didnt have enough strengh to push it back up.... i order the cosworth 272s for a evo 9 i think they sent me the wrong exhaust cam b/c the intake cam works fine.

 

I have cosworth 272's and they work great. If you still have the box they were shipped in post up the part #, I have my old cams in the coswoth boxes so maybe I could compare part #'s for you when I get off work tonight.

 

cool man, that works like i said the intake cam is right im just not sure if the exhaust cam is right. the part# PR8103 for the exhaust cam

 

That's the pn I have and it works just fine.

 

didn't cosworth have a bad batch of cams that needed to be filed down in order to fit? I remember reading about that somewhere on these boards. . .check with the original vendor you purchased from, I didn't follow it that much since I have an VIII

 

idk if they had a bad batch or not but.... i know that for a fact the the cam pushed the valves down to far and the springs couldnt pop them back up. and the intake cam was fine just the exhaust

 

just get a set of calipers on it and measure the lob on the stock cam vs. the lob on the cossie cam
the cossie should only be about 1 mm. taller. if it's way more than that something is up.

it seems strange though since the exhaust cam is the same for an 8 or 9 fitment wize.
i could see getting the intake wrong but not the exhaust.

bleeding down the lifters is probably a good place to start after double checking the measurments


ps. i just installed a set of these on my car 2 weeks ago and everything was fine but i did bleed the lifters.

good luck

 

well i made sure every thing was lined up then i installed the cam put every thing back together made sure again everything was lined up then tried to turn on the car and it wouldnt start witchj i thought was werid... since every thing was good so i took of the valve cover and turned the crank and watched the valve get stuck but a couple sec later they would pop back up.(only on the exhaust cam side)... so i took out the exhaust cam put the stock one back in and the car fired right up. But now it was running like **** so i took out the intake cam put the stock one and it still ran like **** so i did a compression test and piston 1 had 0 compression all the rest were 130. so now i have a bent valve i almost got the head pulled off but i dont know if i should call the vender or cosworth. because personaly i dont think this is my fault all the timing was right and i had one of my friends there and he was a certified tech. he also said there must be something wrong with the cam.