J1720

Anybody ever seen this before??

I just rebuilt the engine and took it for its fist drive. I boost around 15 psi and got a puff of smoke. I limped home and found this.

Engine runs ok but leaking obviously from the crack.

I'm soo sad


2.5 engine
SPR stage 3 turbo
83lbs injectors

J1720

Photo

V2Rocket

hooooooly ****!

if you just rebuilt the engine, should you be boosting that high initially?

ChrisJ951

Probably need to lower the boost for the first few hundred miles then gradually increase the boost. I've never seen a crack in the cam cover, very odd. Was it torqued down too much? Thankfully they are not that expensive and easy to find.

dillon410021

maybe something was in there and the cam pushed it to the side and then cracked the tower

pkt1213

I've got a spair one in the garage.

kinglenario

huh, looks like it got hit from the inside for sure.

Tom M'Guinn

That's what I was thinking, though I dunno. Maybe a bolt or nut that shouldn't have been in there -- or a bolt you forgot to torque?

jc in rb

looks like it got hit from the inside for sure. +1

Dal Heger

Something hit HARD from inside, I'd check the cam really carefully to see if it took any damage. That cam tower is really quite tough, I'm surprised to see anything damage it.

Also, what would boost have to do with this? If anyone is thinking that blowby would overpressure the crank and cause this, you're nuts!

968 GUY

Let us know for sure. I do have a spare tower, but only if you can't find one quickly, kind of like to hold onto it, but would be a legit excuse to go to Myrtle Beyatch!
Especially as nice as the weather has been. I'm in Albany, Ga.

Bri Bro

Looks like a loose bolt to me. I would not run it again until you replace the cam assembly, next time it could do really expensive damage. I just checked Ebay and saw lots of 944T cam assemblies for between 90-150 dollars.

APKhaos

That's almost certainly due to a loose something in the cam tower. Its very hard to see how high boost could cause that damage unless something in the valve train broke and lodged between the cam and the housing. The cam and the lifters need to be looked at very carefully, along with the valves on #3 and #4.

J1720

Thanks for everybody's help.

I'll pull it apart next week. I hope the tower is the only damage

J1720

I had it running on the jack stands for about 1hr before I took it for a drive. I do not know what would of come loose?