Leak at rear of intake

[GNRick]

I had high blms so took out trusty smoke machine. First leak was at egr valve. Replaced the valve, now I see lots of smoke coming somewhere from rear of engine, possibly the intake. Is there anything I can smear on it to seal it, at least temporarily, to confirm where the leak is? I was thinking maybe plumbers putty. Something more permanent would be preferred. Car idles like crap until it is warmed up, and got a code 44 lean O2 sensor. Thanks.

 

[Red Regal T]

Yeah, put some grape jelly on it.

 

[Bandit395]

Grape jelly? Not cool dude! Everyone knows that peanut butter works better for sealing intake leaks.

 

[GNRick]

So can anybody offer any useful advice?

 

[Bandit395]

OK, sorry about the peanut butter joke. But the grape jelly one got me going. You can try a product "the right stuff" which is a thick black sealant. You could smear a bead where the plenum sits on the intak at the rear. It might help a little with the leak to test and see if the BLM's come down. But with the boost I would think it would blow out. Be careful tightening the bolts on the intake as the aluminum threads will strip easily.

 

[TurboRegal84]

Could it be your crossover pipe leaking where it meets the headers?

 

[GNRick]

Could it be your crossover pipe leaking where it meets the headers?

Doesn't look like that is where the smoke is coming from.

 

[Dabigguy]

Pull the coil pack and see where it's coming from.