not a camaro but please help - Team Camaro Tech
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post #1 of 14 (permalink) Old Sep 4th, 08, 03:18 PM Thread Starter
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not a camaro but please help

my wife was driving her santa fe and her timing belt broke and sent the valve through the piston. Note to self, change timing belt every 50,000 miles, it was 2,000 miles past the 50,000 mile mark from the last time i changed the belt.

i got everything back together after buying another head (machined with a new valve job and decked). But i made a very stupid mistake when i put on the new timing belt. The TDC marks are for the #1 and #3 cylinder, and you guessed it, i lined everything up for the #3 cylinder and most likely bent the new valves.

My question is, I replaced the head gasket with a new one when i rebuilt the motor, when I remove the head (for the second time) do i need another new head gasket or can i reuse the one i just replaced for $80.

Thanks
Stan
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post #2 of 14 (permalink) Old Sep 4th, 08, 03:21 PM
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Re: not a camaro but please help

I would replace it. Just my opion.

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post #3 of 14 (permalink) Old Sep 4th, 08, 03:22 PM
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Re: not a camaro but please help

some copper ones are reusable.. i guess it depends on which one you got
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post #4 of 14 (permalink) Old Sep 4th, 08, 03:26 PM Thread Starter
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Re: not a camaro but please help

I was thinking i was going to have to replace it, the price for being stupid. the gasket was from a set i got from the machine shop. i believe that it is from a company called Rock. I'm at work now so I'm not sure if i remembered the name correctly,
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post #5 of 14 (permalink) Old Sep 4th, 08, 04:48 PM
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Re: not a camaro but please help

i would replace it. for insurance purposes. do you want to pull head again if it leaks. sometimes it doesnt sit exactly as first time now you got 2 different impressions and i wont sit right and leak.
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post #6 of 14 (permalink) Old Sep 5th, 08, 07:52 AM
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Re: not a camaro but please help

Definately replace it. Just think of it as a personal punishment , plus you will have peace of mind knowing the gasket won't leak.

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post #7 of 14 (permalink) Old Sep 5th, 08, 08:04 AM
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Re: not a camaro but please help

Gotta replace it. I tried this on a Toyota 20R once and the gasket lasted only 200 miles.

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post #8 of 14 (permalink) Old Sep 5th, 08, 08:00 PM Thread Starter
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Re: not a camaro but please help

ends up that the valves are fine, i guess it needed to break in with the new piston, rings, and head.

after everthing was together i noticed a little oil in the antifreeze, any chance that it was oil that leaked into the coolant holes on the head when i removed everything. oil is fine and it runs like new, no overheating, or any other problems i've noticed. i was going to change the oil tomorrow to make sure no anti-freeze is in the oil.

also no air bubbles and the only oil that i found was on the top of the antifreeze, it is clear when i skim it
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post #9 of 14 (permalink) Old Sep 5th, 08, 11:55 PM
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Re: not a camaro but please help

I Imagine that is an Overhead cam engine. Either way when a Valve meshes with a Piston you have more then likely bent or twisted a connecting rod. I've seen this happen many times. After this kind of incident and the Heads appear not to be damaged always do a Deck to Piston reading at TDC of that cylinder compared to other cylinders to check if the connecting rod has not been damaged.

I've seen OHC Lobes literally rounded on the nose and shear off the Cap of the lifter when the timing belt has slipped or broken causing the Valve to punch a Piston. In most cases particularly with smaller displacement OHC engines the connecting rods get bent.

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post #10 of 14 (permalink) Old Sep 6th, 08, 07:36 AM
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Re: not a camaro but please help

Isn't that a Hyundai? Just one more question. Why didn't you just punt?
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post #11 of 14 (permalink) Old Sep 6th, 08, 12:57 PM Thread Starter
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Re: not a camaro but please help

i took everything to the machine shop and they checked the connecting rods. the rods were the only thing that was reused, everything was replaced.

and if you mean by punt, getting a different car, we just paid this one off and was hoping to be without a car payment for a while. if that is what you ment.

everything is back together and runs great, except the oil in the antifreeze. i guess that means the head gasket failed or it was put in incorrectly. i can not image how it was put in correctly, it only goes on one way and torqued it correct in the correct steps with a brand new snap-on torque wrench
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post #12 of 14 (permalink) Old Sep 6th, 08, 10:47 PM
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Re: not a camaro but please help

head gasket shoud always be replaced.
Have you replaced the head bolts. Confirm with hyundai dealer if they are stretch head bolts. If they are they need to be replaced each time you do a head. Second thing, flush your cooling system completely and see after for oil mixing with antifreeze. Was the replacement head magnaflux????
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post #13 of 14 (permalink) Old Sep 7th, 08, 07:57 AM
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Re: not a camaro but please help

I realize that this is a little late for you but I always use new head bolts on everything. I catch a lot of crap for it but I consider it cheap insurance. Another thing I do that supposedly isn't necessary is paint both side of a head gasket with aluminum paint. I have never had head gasket failure either. In your case, I would flush the cooling system before I got to concerned about leaks in addition to changing the oil.
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post #14 of 14 (permalink) Old Sep 7th, 08, 09:14 AM Thread Starter
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Re: not a camaro but please help

brand new head bolts were used. the head was pressure tested and decked by the machine shop.

i was thinnking about changing out the antifreeze, but i do not think that it will help, i am going to change the oil today to see if it has any anti freeze in it
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