Head Gasket blown (sr20det)

[silviabatman]

Has anyone here blown the head gasket and not warped the head. I overheated....not too bad but the engine got up towards H....had it towed to get a new thermostat and that brought the temp down....after a few minutes of driving around with the temp down....noticed a puff of blue smoke followed by the white fog of smoke, then ****ty *** idle and very hard startup with idle stumbling all over the place (wet injectors from coolant i assume)

The car currently sits at Altered Atmosphere in Maryland where they are gonna replace the head gasket with a GReddy MHG. Im also sending them a GT2871R and some fat *** injectors.

anyways, just wondering if anyone has just blown the HG or if its usually a warped head problem....(any engine with alum. head)

-Andrew
Modified by silviabatman at 9:03 PM 2/26/2007

[S13FASTBACKSR]

i am not sure 100% if the heads warp every time when you blow the HG but i am pretty sure they dont I have never heard of it happening..if they do you just have it resurfaced which isnt a lot of money usually less than 100 dollars..i really chimed in to say dont go with a greddy HG they are equivalent to the cometics which IMO and others arent the greatest..spend the extra money..Tomei, Apexi, Hks

[Broadfield]

You always want to get the head re-surfaced regardless. It's cheap and comes out perfect. You will love the 2871R. I am running one with .64 A/R and put down 400whp on pump gas. I would recommend 850cc injectors.... PE's (Power Enterprise) are drop in and the best on the market in my opinion. I am running 850's and run about 78% injector duty cycle. The PE's are also a dual stage, so they will idle nice, even though they are fairly big.

[S13FASTBACKSR]

400rwhp on pump gas on the 2871r thats really impressive man..i know you have some aftermarket cams with that setup and probably a greddy intake mani? very nice man

[silviabatman]

yeah im hopin to go with 850's, and im hopin to draw 360whp.....altered atmosphere is doin all the work while they have everything apart and then tuning it.....can't wait for this bad boy to be ready

[silviabatman]

hey broadfield,

did you blow your headgasket and is so, was that pretty much the same set of symptoms you described?....

gonna have them re-deck the head while its out

[S13FASTBACKSR]

when you blow your HG your temp goes sky high, the car bogs like a mofo and has an insane loss in power...you accelerate and the mph at say 50 or so and the mph just dont move..they just start dropping because the car is pretty much not drivable depending on how bad the HG is now..white smoke pouring out the exhaust and if you open your radiator cap the anitfreeze coolant will look milky

[silviabatman]

no i understand the symptoms and i know my HG is blown....ive searched and read since it happened last weekend....

i just wanted to hear some survivor stories of blown HG's on alum. heads without warping

maybe give some hope haha....but its gettin re-decked anyway

[travisn]

get it decked. then you will have slightly higher compression... more powar... lol

[Broadfield]

400rwhp on pump gas on the 2871r thats really impressive man..i know you have some aftermarket cams with that setup and probably a greddy intake mani? very nice man

Yeah, 264 Toda cams, Greddy mani, and bigger TB. Tuned with a Power FC D-Jetro. I made my peak power @ 7800 rpm which is where we shut it down...... so it was still climbing. I am going to build the head next winter and see what it will do @ 8500 and up.

hey broadfield,

did you blow your headgasket and is so, was that pretty much the same set of symptoms you described?....

gonna have them re-deck the head while its out

No, I have never blown anything on any car I have ever owned. Sorry, I am of no help there.

[S13FASTBACKSR]

I made my peak power @ 7800 rpm which is where we shut it down...... so it was still climbing. I am going to build the head next winter and see what it will do @ 8500 and up.

wow very impressive man...planning on going with solid lifters when you build the head?

[eds13]

moved to the EEEESSSSSSSSAAAAAAAAAARRRRRRRRRRRRRRR forum

[silviabatman]

thanks.....it started out as a question for anyone with an alum. head....but the horsepower bug got us and it quickly evaporated into power talk...

-Andrew

[S13FASTBACKSR]

i love power talk..i love power more

[silviabatman]

i wanna know if anyone has actually warped a head...this shop is talkin about maybe not bein able to get the head decked in time...so id be goin on a prayer that the head is not warper....**** i hate this kinda ****

-Andrew

[travisn]

decked in time for what? its winter out.

[silviabatman]

long story short....cars in maryland and im in new york....the only time i have available to pick the car up is march 9th on that weekend.....im in the military....anyway, like i was sayin, has anyone blown a headgasket (due to overheating) and not warped the head? if so let me know, or im gonna have to wait and have it shipped up which i DONT want to do

[travisn]

dude thats close as hell away... its best not to rush things of that importance

[homeslicej2]

dude thats close as hell away... its best not to rush things of that importance

Yes, when you blow a headgasket and overheat you might warp the head (alum) or crack it (iron), but I have always been told that you have to overheat it badly (keep running it when you overheat, etc.) to do either. if you shut it down as soon as you realized it was overheating you probably ddin't do too much damage. You may have gotten slight warpage, but as others have already said, decking it will fix slight warpage (among other things). Take the time to get the head fixed or you will have more problems.

[silviabatman]

yeah i definitely shut it down and didn't run too too hot....i dont think i cracked anything but warping could have ocurred on the head. Anyways, Altered Atmosphere is takin the head out and having it decked for me....slight miscommunication....i think he thought i wanted the block removed and decked which should definitely not be necessary.....but i am takin this as an oppurtunity to get these installed:

1. GT2871R (replacing the T28bb)2. 740cc injectors (replacing the 550cc's)3. hks head gasket (obviously)4. new water pump (for good measure)5. all new seals (why not, its all apart)6. full dyno tune (tune tune tune baby)

can't wait to have my puppy back.... 350+ rwhp here we come!!!!

[homeslicej2]

Yeah the SR is alum block and head, I was just commenting on iron blocks/heads just to let you know the difference when they overheat. I wish I had the money to get all the stuff you have. College does take away your money though.

[S13FASTBACKSR]

z32 maf as well right? gonna need it

[silviabatman]

heres a list of the current setup....

-S14 SR20DET *stock BB T28* -Greddy TRUST forged internals -Greddy TRUST shot peened rods -Greddy Airnix intake kit w/Z32 MAF -Greddy Radiator Cap -Greddy Baffled oil pan -Greddy Type R FMIC w/polished pipes -Greddy e-manage fuel computer -Greddy TRUST Valve springs -Greddy exhaust elbow -Greddy Speed cut eliminator -HKS wastegate actuator -HKS 1.3mm metal head gasket -HKS rocker arm stopper kit -HKS SSQ Blow off valve -Blitz FATT Turbo timer -Blitz 550cc injectors -Walbro 255lb fuel pump -3.25" downpipe -3.25" test pipe -Custom 3.25" catback exhaust system (custom one of a kind) -14" Electric fan kit -SPEC stage IV 6 puck clutch -Battery relocation kit -XS power equal length exhaust manifold -Koyo copper radiator

[silviabatman]

i just dont understand how i could blow the HKS 1.3 mm metal headgasket....but im blowing white smoke and it smells sweet with a ****ty idle and low compression after that slight overheat. Has anyone ever heard of someone gettin a ****ty MHG or blowin through one.????

i havent

[silviabatman]

anyone?....this doesn't sound like fried piston rings does it?? or possibly blown turbo....hopefully, i popped the metal head gasket....coolant leaked so thats why im blowing white smoke, and fouled up the injectors causing a really ****ty idle....if its the HG, thats gettin replaced and if its the turbo, thats gettin replaced too....just find it odd that i have every symptom of a blown HG when there was a metal one in before....are metals just as prone to blowing during an overheat??

sorry so many questions during my rant....i love my baby is all

[homeslicej2]

I'm not the expert on this. A MHG is so you can run higher pressures within the motor i.e. boost, etc and not worry about blowing the gasket. If the motor overheats though it seems to me that you can still blow the gasket no matter what material it is. If you can warp the head/block while overheating it makes sense.

I suggest a mod move this thread to the nissan online mechanic forum so that you can get a correct answer from someone more knowledgeable on this matter.

[jspek]

seriously, get the head resurfaced. it would suck if you put all those parts on the car, just to have to do it all over again. trust me, my sr is sitting in pieces right now, thought it was just a blown hg, and the head is fine except where the gasket took a ****. im torn between what to do, get another head or resurface it. most likely both.

[Dark_Wave]

seriously, get the head resurfaced. it would suck if you put all those parts on the car, just to have to do it all over again. trust me, my sr is sitting in pieces right now, thought it was just a blown hg, and the head is fine except where the gasket took a ****. im torn between what to do, get another head or resurface it. most likely both.

When your talking about get the head resurfaced, do you meen that we need to resurfaced the block to on witch the head sit to?