Possibly Intake Crack
#1
Possibly Intake Crack
I always knew someday my intake manifold would crack, but Im not sure if today is that day. I think I may have a hairline crack between the base of one of the runners and the coolant passage.
I'm not sure if I'm losing coolant but I am getting coolant smoke on startup.(start up smoke seems to be problem w/ me).
I think the coolant could be sitting on the valve and being dumped in and burnt off on startup.
I havent heard of anyones intake manifold cracking gradually so im not sure if this is actually the issue. Does anyone have any other possible ideas or do you all think I hit the nail on the head with the diagnosis?
I'm not sure if I'm losing coolant but I am getting coolant smoke on startup.(start up smoke seems to be problem w/ me).
I think the coolant could be sitting on the valve and being dumped in and burnt off on startup.
I havent heard of anyones intake manifold cracking gradually so im not sure if this is actually the issue. Does anyone have any other possible ideas or do you all think I hit the nail on the head with the diagnosis?
#3
I think you hit the nail on the head. My intake cracked slowly, it started off not being that bad and being driveable. I was doing a little sprint one night with my buddy and it blew wide open.
As far as the smoke, I never had that problem. My best advice would be to check the valley real good. When mine cracked it puddled up in the valley real bad.
As far as the smoke, I never had that problem. My best advice would be to check the valley real good. When mine cracked it puddled up in the valley real bad.
#4
i have an idea to test this, its basically a leak down test for your intake. I'll take a picture of what i made to test mine later. Basically what i did, is make an apparatus that will push in a regulated 20-30 psi in the intake with the engine stopped. On a completely sealed engine, there should be no leaks. However, with a crack you should hear and feel air coming out of the intake.
Hope this helps! I made mine out of PVC piping, its not hard at all to make
Hope this helps! I made mine out of PVC piping, its not hard at all to make
#5
I think mine may have cracked differently than most/every other intake manifold. I fully checked the valley with a UV test. And it looks bone dry. I really need to pressure test the system.
I think mine may somehow be leaking directly into one of the intake ports. I replaced the intake gaskets not that long ago so I doubt its that.
I think mine may somehow be leaking directly into one of the intake ports. I replaced the intake gaskets not that long ago so I doubt its that.
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panic
5.0L GT S550 Tech
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09-10-2015 05:56 PM