overflow full after boost
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From: ME
Re: overflow full after boost
It's not bad to check out everything before pulling the head. I thought I had a blown headgasket on my fresh sleeved block, but it turned out the new thermostat I put in was stuck closed...Different symptoms than this car but you get the idea. That said, you probably need a new headgasket haha
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From: Savin lives
Re: overflow full after boost
Hey hey hey. Let's not turn this thread into an unnecessary flaming thread. HiProfile has helped me out on here in the past (although he may not remember it). But can someone clarify how headlift could cause coolant to overflow? I'm assuming when the seal between the head, block, and gasket is broken some of the built up pressure from the turbo enters the coolant passages and increases the already pressure filled coolant system and thus opens the secondary spring on the rad cap so that the coolant flows in the overflow. I should probably have searched first, but the topic was brought up already so I might as well ask.
the other guy went into a long drawn out explanation to say check your radiator cap. I you can do a leak down and it's not going to show any symptoms of head lift becuase it happens under boost. the best way is to put it on the dyno and see if your losing boost also log coolant temps.
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Joined: Apr 2005
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From: central, ca, usa
Re: overflow full after boost
^^ LOL at you, because I posted a generic logical reason to do basic test then to jump in and change a head gasket right away? I never EVER SAID (yes double negative kid) that it could not be head lift. Either way do the basics, because there is no reason to pull off a head just because some clown like HiProfile said to. Do the basic checks first and if you find nothing wrong then venture further.
HiProfile you need to read, he said he HAS ARP Bolts so stop being a douche, thinking you know everything. He asked what would a radiator cap have to do with anything, I answered what the possibility might be.
HiProfile you need to read, he said he HAS ARP Bolts so stop being a douche, thinking you know everything. He asked what would a radiator cap have to do with anything, I answered what the possibility might be.
Thread Starter
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Joined: Apr 2005
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From: central, ca, usa
Re: overflow full after boost
It's fairly obvious you've never experienced head lift issues. Whatever you want to call it, it stems from the head/gasket/block seal around the cylinders unsealing ONLY when there is extremely high pressures in the cylinders. A leakdown test at 150psi won't show much, since it will only leak near peak cyl pressures (over 1k psi). If it's a rad cap, it will bubble while heating up. If it was a blown HG, it would suck coolant into the cylinders as well as expell exhaust into the coolant, start to overheat, and fill the overflow at almost any rpm/psi.
I'd be willing to bet if you turned the boost down, you'll find a point (5psi?)where you can beat the living **** out of it and still have a nearly empty overflow.
The best fix will be to replace the HG and get ARP's. The main problem with Honda motors is idiots reuse the OEM bolts, and sometimes reuse the MLS headgasket. OEM bolts and HG are single-use items, no exceptions! It would be a great idea to check & fix any warpage, but it's unlikely you'll find any.
I'd be willing to bet if you turned the boost down, you'll find a point (5psi?)where you can beat the living **** out of it and still have a nearly empty overflow.
The best fix will be to replace the HG and get ARP's. The main problem with Honda motors is idiots reuse the OEM bolts, and sometimes reuse the MLS headgasket. OEM bolts and HG are single-use items, no exceptions! It would be a great idea to check & fix any warpage, but it's unlikely you'll find any.
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Joined: Apr 2005
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From: central, ca, usa
Re: overflow full after boost
yes it can. I'm clarifying. According to his symptoms it is head-lift.
the other guy went into a long drawn out explanation to say check your radiator cap. I you can do a leak down and it's not going to show any symptoms of head lift becuase it happens under boost. the best way is to put it on the dyno and see if your losing boost also log coolant temps.
the other guy went into a long drawn out explanation to say check your radiator cap. I you can do a leak down and it's not going to show any symptoms of head lift becuase it happens under boost. the best way is to put it on the dyno and see if your losing boost also log coolant temps.
Thread Starter
Junior Member
Joined: Apr 2005
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From: central, ca, usa
Re: overflow full after boost
I believe it just didnt happen just that night.I'd been smashing on it ever since the dyno always check oil.water,always looking at the temp gauge,boost gauge no changes.There all at normal operating.
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From: Westford, MA
Re: overflow full after boost
yes it can. I'm clarifying. According to his symptoms it is head-lift.
the other guy went into a long drawn out explanation to say check your radiator cap. I you can do a leak down and it's not going to show any symptoms of head lift becuase it happens under boost. the best way is to put it on the dyno and see if your losing boost also log coolant temps.
the other guy went into a long drawn out explanation to say check your radiator cap. I you can do a leak down and it's not going to show any symptoms of head lift becuase it happens under boost. the best way is to put it on the dyno and see if your losing boost also log coolant temps.
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Joined: Sep 2002
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From: ME
Re: overflow full after boost
My b16 did that for a little while. About 6000 miles of beating it into the ground. I just topped up the coolant when the idle would start surging (still had FITV). Never did blow the HG.
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From: central, ca, usa
Re: overflow full after boost
Ok just start up my car completely cold, waited for a minute or so still cold.Tried to open the radiator cap and coolant just pouring out of it.I've done this before coolant would be steady untill the thermostat opens and you would see it just flowing right.[head gasket]
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From: Savin lives
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From: Dont Steal My Car, Ct, USA
Re: overflow full after boost
Ok just start up my car completely cold, waited for a minute or so still cold.Tried to open the radiator cap and coolant just pouring out of it.I've done this before coolant would be steady untill the thermostat opens and you would see it just flowing right.[head gasket]
What temp gauge have u been reading?
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From: 40.201N, 77.189W, PA
Re: overflow full after boost
99 times out of 100, if the coolant system is being pressurized under boost, it points to the head gasket.
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From: central, ca, usa
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From: columbia, sc, usa
Re: overflow full after boost
well since this thread is open can i ask mine. mine never over flows. jsut boils. did compression check. and im good. no leak down test yet. the fluid in the over flow is extremly hot. and yea i know its spose to be. and i beleve thats why its boiling. does anyone know why it is getting so hot. i have a 170 degree thermostat 2 step colder plugs. fan cuts on, and never runs hot.
Re: overflow full after boost
so when your talking about the water temp rising...are you talking about 3-5degrees(only visable on a datalogs)after a pull or heat gauge in the red?
just to confirm
just to confirm
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