How long to wait before start?

96GTRagTop · Sep 16, 2007

I'm swapping out the intake to my 96 with an updated PI intake. I would like to know how long u guys waited before starting the car up after u put the PI intake on the NPI heads?

ripper · Sep 16, 2007

If your askin how long it takes for the silicone (or whatever they call that stuff) to dry it should say on the tube. I think its like 24hrs.

MustangMatt96GT · Sep 16, 2007

20-24 hours

reivaxtorres · Sep 16, 2007

i used the RTV method and as soon as i got everything bolted up (about 2 hrs after i applied the RTV), i turned it on and took it for a test spin around the block, checked for leaks, and then hauled ass on the freeway to see the difference. never leaked and now that i was able to take off the manifold for the headswap this weekend, it looks like the RTV did what it was supposed to do. the seals were perfect and everything.

for the record, you dont 100% need the RTV if you use the PI manifold on NPI heads with PI gaskets. the RTV is just an insurance policy. the seal from the gasket is good enough to BARELY clear the water jacket, but it will clear it and seal it without the need of RTV. like i said, its just a really cheap (but stinky) insurance policy.

Mr Jones 4.6 · Sep 17, 2007

I agree, I took and by the time i installed the intake and put everything back on I started her up and drove it.

96GTRagTop · Sep 17, 2007

well i did the swap today and we fired it up and everything was ok. No CEL..idled fine. We let it sit running for about 20 minutes, couldn't see and leaks, and took it out for a spin. By the time we got back we noticed it cmoking a little, couldn't find any leaks though. Took it out for another test drive after the smoke seemed to clear and came back in and noticed a little smoking again. Not as bad as the first itme though. While checking the car again for leaks we noticed the CEL fturn on. We scanned it and it said cylinder 4 is misfiring.

The smoke was coming from the rear of the intake manifold. It seamed almost like it was ocming from behind. The crack in my intake was right above the 4th cylinder. We never pulled the plugs to clean them or blow them out. Just the wire boot and the injector ports.

reivaxtorres · Sep 17, 2007

96GTRagTop said:
well i did the swap today and we fired it up and everything was ok. No CEL..idled fine. We let it sit running for about 20 minutes, couldn't see and leaks, and took it out for a spin. By the time we got back we noticed it cmoking a little, couldn't find any leaks though. Took it out for another test drive after the smoke seemed to clear and came back in and noticed a little smoking again. Not as bad as the first itme though. While checking the car again for leaks we noticed the CEL fturn on. We scanned it and it said cylinder 4 is misfiring.

The smoke was coming from the rear of the intake manifold. It seamed almost like it was ocming from behind. The crack in my intake was right above the 4th cylinder. We never pulled the plugs to clean them or blow them out. Just the wire boot and the injector ports.

i would just replace the plugs. the smoke was probably some oil you dripped onto the exhaust manifolds that was buring off, or maybe the valve covers didnt seal right.

96GTRagTop · Sep 17, 2007

1. i didn't take the valve covers off.
2. there no oil involved in the PI intake Swap.
2.b. theres a sweet smell to the burn. Like coolant

reivaxtorres · Sep 17, 2007

96GTRagTop said:
1. i didn't take the valve covers off.
2. there no oil involved in the PI intake Swap.
2.b. theres a sweet smell to the burn. Like coolant

1. im an idiot, i thought you did the PI cam swap, my bad
2. read above
2.b. make sure that coolant hose on the back of the manifold is on good, and that the manifold isnt cracked there.