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Old 07-20-2004, 12:27 PM
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Join Date: Oct 2002
Location: Toronto, Canada
Posts: 700
Cracked valve and broken valve spring

Hi Guys

I haven't posted in a while since I've been working a lot, but that has come to an end, and with that end, I decided to fix the head gasket oil leak in my 190.

I managed to pull off the head without too much effort, I'm still amazed at how easy it was compared to the last car I did this on.

Today, I decided to replace the valve stem seals, and as I was doing so, I discovered that one of the exhaust valves has a hairline crack about 1/4 of the radius of the valve, it has to go. On a totally different cylinder, the spring also on the exhaust valve was broken, now this had to have happened some time recently because there is not much wear and tear on the broken spring, and the car just passed it's final emissions test without a problem. I also keep a very close eye on my car but recently others have been driving it more often then I have.

In any case, today, once my dad comes back from work and I have access to a car, I'm going down to the dealer to see if I can get those parts ordered in along with some nuts and bolts that are too old to be put back on to the car, I am wondering however if I should drop the head off at the dealer to get it rebuilt. Now as for milage on the engine which is probably what should determine if it should be rebuilt or not, I don't know what it is since the engine has been swapped before I bought the car, I do know that it has at least 40000km on it that I've had it with me for, but from what I have been told it should be between 150000km and 200000km.

Looking it over, other then the valve stem seals, everything looks in really good shape, no visible damage, I will be measuring the valves in a bit but they don't have any noticeable slack.

I do have a single question, since one of the valves will be replaced, I will have to get it ground to make sure that it seats propperly, is there anything else that is a must in this situation, or any other recommendations? I think I will leave the grinding to a reputable shop or the dealer, unless it is something easily done, however I'm not familiar with the procedure at all.

Thanking you in advance

xp
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