Head Gasket Popped from Boost?
#1
Head Gasket Popped from Boost?
What's up guys,
I have a 94 Miata with an 03 motor running MS3PNP and a Garrett T25 pushing 13lbs as of last week. After pulling it out of the garage a couple of days ago I noticed it left a couple oil spots. Unfortunately, I'm the kind of person that hates leaks more than anything. I did the valve cover gasket and replaced the copper washers for the VVT hardline. Upon further inspection, I notice that both sides of my block are somehow wet, all below the head. I get under the car and I see oil streaking down the side of the trans and collecting at the bottom. I also found oil within the slave cylinder boot.
While my tuner was working on it, it apparently spiked to 18lbs. I know for a fact the car has not overheated. Could boost spiking cause the factory head bolts to stretch enough to pop the head gasket? Should I bother getting them resurfaced if I know it hasn't overheated?
I plan on taking the head off after this holiday weekend and putting on a new head gasket with ARP studs.
Thanks guys
Here's an album of images with descriptions: https://imgur.com/a/fspoIYo
I have a 94 Miata with an 03 motor running MS3PNP and a Garrett T25 pushing 13lbs as of last week. After pulling it out of the garage a couple of days ago I noticed it left a couple oil spots. Unfortunately, I'm the kind of person that hates leaks more than anything. I did the valve cover gasket and replaced the copper washers for the VVT hardline. Upon further inspection, I notice that both sides of my block are somehow wet, all below the head. I get under the car and I see oil streaking down the side of the trans and collecting at the bottom. I also found oil within the slave cylinder boot.
While my tuner was working on it, it apparently spiked to 18lbs. I know for a fact the car has not overheated. Could boost spiking cause the factory head bolts to stretch enough to pop the head gasket? Should I bother getting them resurfaced if I know it hasn't overheated?
I plan on taking the head off after this holiday weekend and putting on a new head gasket with ARP studs.
Thanks guys
Here's an album of images with descriptions: https://imgur.com/a/fspoIYo
#4
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if you are set on changing the head gasket, have it checked for flatness at a machine shop, and send it with ARP head studs.
im running original reused 20 year old head bolts on my semi built motor at 17psi, 309hp, for almost 2 years now with zero issues.
#5
headbolts will not stretch at 18psi and certainly not on a T25 turbo.
if you are set on changing the head gasket, have it checked for flatness at a machine shop, and send it with ARP head studs.
im running original reused 20 year old head bolts on my semi built motor at 17psi, 309hp, for almost 2 years now with zero issues.
if you are set on changing the head gasket, have it checked for flatness at a machine shop, and send it with ARP head studs.
im running original reused 20 year old head bolts on my semi built motor at 17psi, 309hp, for almost 2 years now with zero issues.
Was mine just bad luck? Something is clearly not right if the sides of my block are wet with oil. I'm pretty set on it. Also, since I have to wait until after the holiday weekend, how much can I expect to pay for a head resurface?
#7
If you're not tuned for 18psi, and it hit 18psi and leaned out, that could/would cause detonation. A less-than-awesome tune in general could be detonating on the regular.
It's just a theory that i'm coming up with with the assumption that your diagnosis of a blown head gasket is correct.
#11
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I doubt it's the headgasket. They aren't really known for failing on these motors. More likely your VC gasket, CAS (or the CAS plug if you arent running a CAS), or cam seals. Any of these leaks can look pretty bad but actually be a pretty simple fix.
#13
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Put some oil dye in there and try to track it down. I've had a few mysterious oil leaks, one of which was the valve cover, that I thought for sure was a much bigger issue. It's really hard to track 'em down sometimes.
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