View Full Version : Help: After putting a MHG, I have oil in coolant.
acetmi
08-16-2006, 01:34 PM
So my car was running well before I decided to tear it up and put in a MHG. The whole length of the head was machined, but for the block I cleaned it myself and went up to 1500grit sand paper. I'm using a Greddy 1.5 MHG, with a copper spray coating. I filled my coolant with just water.
I start up the car, and the engine idles rough, peaking up and down. However, after 15 min or so of running, I saw white some coming out of the exhaust manifold side of the engine bay. So I shut the car down, but I could not see any oil leaks, either from the turbo feed/return hoses, or the dip stick. No oil leak form the front of the car either. However, I check my coolant, and it's that creamy/light yellow color, and i can see oil in the coolant. I check my oil using the dipstick, and in about the 15 min of running the engine, almost all the oil is used up. There was no coolant in the oil, however.
Does that only mean one thing? That the head gasket did not seal? Could there be something else?
Any help at all will be very highly appreciated.
JustAnotherVictim
08-16-2006, 01:36 PM
You're not supposed to use spray if the gasket is new.
robbo185
08-16-2006, 01:37 PM
id be willing to bet the block isnt completely flat
skim1040
08-16-2006, 02:11 PM
id be willing to bet the block isnt completely flat
possibly...Probablly dumb question, but did you tork everything down properly etc?
acetmi
08-16-2006, 02:25 PM
possibly...Probablly dumb question, but did you tork everything down properly etc?
Torqued head bolts to 85lbs. All head stuff was also torqued to specs. I was expecting things to turn out fine, but I may also be wiling to sell off my car (http://www.supramania.com/forums/showthread.php?t=24838) as I dont have time till next summer if I am to open the engine up again.
But please, if there may be any other problem besides a possible loose head gasket, lemme know.
mattjk
08-16-2006, 02:27 PM
were there any rivets on the mhg?
steve_mk3
08-16-2006, 02:41 PM
What head gasket did you use? If cometic did you check to make sure the rivets were correct?
Did you place the sealent on the two spots in the front?
Did you make sure the inner timming cover was level with the block deck?
mattjk
08-16-2006, 02:41 PM
he used a greddy.
Allan_MA70
08-16-2006, 03:01 PM
sanding block = bad
you have to mechine the block for a MHG no if's but's or maybe's
hottscennessey
08-16-2006, 03:20 PM
I sanded the block. lol. I'm happy.. its lasted a year on high boost. Its a good thing I've been building a back-up motor.
sanding block = bad
you have to mechine the block for a MHG no if's but's or maybe's
Not only bad...sanding the block is best way there is to FUBAR a block deck. Using sealer on a new MHG = destroy/turn into goo factory seal coating. 85 ft/lbs on factory head bolts...bolts have already been stretched = crap shoot on even torque distributation. RA on the head surface? Anything more than a 30 RA for a Greddy = potential bad seal.
Hate to say this, but you did just about everything possible to ensure the HG would not seal properly. :3d_frown:
acetmi
08-16-2006, 03:28 PM
Not only bad...sanding the block is best way there is to FUBAR a block deck. Using sealer on a new MHG = destroy/turn into goo factory seal coating. 85 ft/lbs on factory head bolts...bolts have already been stretched = crap shoot on even torque distributation. RA on the head surface? Anything more than a 30 RA for a Greddy = potential bad seal.
Hate to say this, but you did just about everything possible to ensure the HG would not seal properly. :3d_frown:
85lbs on ARP studs. RA on head surface was 20. Ahh, guess I'll call it a painful learning experience.
85lbs on ARP studs. RA on head surface was 20. Ahh, guess I'll call it a painful learning experience.
Ok...those are good (it's 81 ft/lbs for ARP studs using moly BTW)
We'll reduce punishment to 25 lashes ;)
Your block is going to require decking to the same RA spec.
cadman
08-16-2006, 03:36 PM
Ok...those are good (it's 81 ft/lbs for ARP studs using moly BTW)
We'll reduce punishment to 25 lashes ;)
Your block is going to require decking to the same RA spec.
Yeah... he'll pluck 25 of your eye lashes out... one... at...a...time!!!
acetmi
08-16-2006, 03:57 PM
Yeah... he'll pluck 25 of your eye lashes out... one... at...a...time!!!
Too late... I've already done that after I realized my mess up.
89jdm7m
08-16-2006, 04:11 PM
85lbs on ARP studs. RA on head surface was 20. Ahh, guess I'll call it a painful learning experience.
i went w/ arp's recomendations... i figure they say 75 ft/lbs (may not be the correct #) for a reason, and it's far better than toyota's torque specs... i also used a stock HG because i couldn't locate a machine shop that could machine my block/head properly at a fair price
i went w/ arp's recomendations... i figure they say 75 ft/lbs (may not be the correct #) for a reason, and it's far better than toyota's torque specs... i also used a stock HG because i couldn't locate a machine shop that could machine my block/head properly at a fair price
ARP spec on their head bolts is 75 ft/lbs using moly when installed on an aluminum head (like ours).
89jdm7m
08-16-2006, 05:22 PM
ARP spec on their head bolts is 75 ft/lbs using moly when installed on an aluminum head (like ours).
maybee they gave me bolt instructions w/ their head studs... :dunno:
americanjebus
08-16-2006, 08:37 PM
ok dont want to make you feel dumb but i have to ask
when you did this did you make sure you completely drained the block of coolant and oil when you changed your hg. i mean completely.
i did a hg job on another car and there was enough coolant left in the block and enough oil that didnt drain out that when i was doing my work they got mixed, (this engine was tilted so probably more likely to happen than in a 7m) but either way. have you changed both atleast twice so far to make sure its not just contaminated oil and coolant that you mixed after running your engine?
two oil changes and two flushes fixed my problem, its a long shot but i hate to tell you that all of your work was for nothing and that you have to do the whole thing over again.
Too late... I've already done that after I realized my mess up.
Hey man...don't feel too bad. I'll let you in on a secret...a lot of us here have screwed up too...maybe even worse than you ;)
When you figure out what you're going to do, ask an we'll try to help. looks like to me you're open to being helped :thumbup:
pimptrizkit
08-17-2006, 03:05 AM
eh..
bought my motor, ripped the head offin fvor to replace the hg, the hg was blow, head and block were strait.through arp's 85 ftbls.. last a good while runnin 14psi.. blew it in about 4 months.. had the head machined. was only .03 off or some thing small. took it to 25ra, and sand prped the block.. made sure the rivets were not hitting, didn't use sealer, but i do have bubbles in my coolent system now..
so im going to rebuild the bottom end before she decides to go down the crapper with my luck of events .. atleas thtis way i can balence my motor.. :biglaugh:
acetmi
08-17-2006, 06:01 AM
ok dont want to make you feel dumb but i have to ask
when you did this did you make sure you completely drained the block of coolant and oil when you changed your hg. i mean completely.
i did a hg job on another car and there was enough coolant left in the block and enough oil that didnt drain out that when i was doing my work they got mixed, (this engine was tilted so probably more likely to happen than in a 7m) but either way. have you changed both atleast twice so far to make sure its not just contaminated oil and coolant that you mixed after running your engine?
two oil changes and two flushes fixed my problem, its a long shot but i hate to tell you that all of your work was for nothing and that you have to do the whole thing over again.
This may be interesting... I did drain all the oil frmo the car, coolant was drained by unplugging the radiator plug at the bottom. After the head gasket job, I filled up my oil and coolant (with water), started it, and in about 10 minutes of running, the oil level has dropped to low (as checked in the dip stick), and oil was seen mixed in the water from the coolant (there is actually a lot more oil in the coolant than water itself). The block has been on the car all the time while doing this job.
Does this help?
acetmi
08-17-2006, 06:03 AM
Hey man...don't feel too bad. I'll let you in on a secret...a lot of us here have screwed up too...maybe even worse than you ;)
When you figure out what you're going to do, ask an we'll try to help. looks like to me you're open to being helped :thumbup:
Hey thanks man. Right now I have exams coming up in a couple of weeks, and I don't think I'll have any time to fix this until next summer :3d_frown:
If and when I do get to start fixing this head again, I'll look y'all up.
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