Does it need a FULL 24 hours?? I just finished putting my car together after a cam install and I want to start the damn thing. It's all ready to go just gotta slip the belt on and it's done. It's been sitting since about 12:30 last night so it's been just over 20 hours. I just want to know if there have been an horror stories or some BS that's going to prevent me from driving again. I have put in so much work this week on the car I want to drive the fruits of my labor.

 

People say wait 24 hours but if its been sitting for over 20hours I dont think its going to hurt you to start it now.

Aaron

 

Most say about 24 hours to be on the safe side.. Why would they tell you the "actual" time it takes to dry? The results vary so they just estimate it so that no one has anyproblems.. 20 is plenty.. Bet you cant wait huh??

 

You should wait 24 hours maybe longer depending on the temp. I think I waited a day and a half to start mine. I know how it feels, I fixed the intake leak and re-built my trans at the same time, and was dying test the tranny.

If you waited 20 hours and think it's enough, go for it. It should be fine, worst case, it will leak and you will just have to take it off and re-do, but at least you will be able to run your car.

Dave

 

This is my question..... if you waited for 20 hours for this problem and you feel that its important enough to ask......then obviously your thinking about it a lot. So whats another 4 hours. In your case...mine also ...why not just wait the other 4 for piece of mind alone.

 

I started mine about 20 minutes later. Once the motor was all buttoned up i started it and drove it.

No problems here.

 

Same here

 

it all depend on that temp and humidity. Mine took TWO full days to drie up completly. You can check this by feeling it. you dont want to start up before it dries at all since it will just blow out and create a leak with pressure in the intake.

 

I use the GM grey sealant.. I have also done over 30 of these intakes and never once waited 24 hours...That is ridiculous. (Used to work on these at a dealer)

I would wait 10-15 minutes to let the sealant set up before installing the intake, but as far as worrying about it curing properly, it is cured enough to seal within a 1/2 hour. Make sure to bend the EGR tube away from the intake as much as possible..

 

i have done it several of times with gray rtv and started it as soon as i got everything back together and i only had a problem once and that was due to me not cleaning the surface well enough before i put the new rtv on.

 

I'm sure you could start it but I also think that if you went into boost it could blow it out or something. I don't know... I bolted up the intake and ended up having to take it off again after about 26 or 28 hours and the RTV was not completely cured. I think it needs the heat from the engine to fully set.

 

I ran 10 PSI no problems right after intake jobs twice on my car.. I guess if you use real cheap rtv or do not clean the surfaces properly, then it might have a problem. But if you use the GM grey, you definately do not have to let it sit and cure for any where near 2 hours...let alone 24???

If you are worried about it blowing out due to boost..Drive it normally for a couple of days..

 

I used to work at a GM dealer and now work at a Nissan dealer. I just put them back together, fill with coolant and oil and start'em up. No problems so far.