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Old 09-23-2010, 07:22 AM   #1 (permalink)
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'87 300D Head Gasket questions.

'87 300D Head Gasket

I have an coolant leak so I took it to a dealership which told me I have an head Gasket that leaks and wants to charge $2,200 to replace. I am somewhat mechanically inclined and am thinking about doing it myself. Is this a job that should be done by someone that knows the ins and outs of Mercedes? If I do it myself, is there anything I should be aware of?
Does the head itself normally warp? Does the block usually crack?
Where can I purchase "Special Tools"?

My wife did drive it couple of weeks ago with low coolant and said it got hot! I'm not sure how hot it got but am sure that is why the head gasket now leaks.
Thanks in advance.
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Old 09-23-2010, 07:33 AM   #2 (permalink)
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Quote:
Originally Posted by 87tdbyer View Post
'87 300D Head Gasket

I have an coolant leak so I took it to a dealership which told me I have an head Gasket that leaks and wants to charge $2,200 to replace. I am somewhat mechanically inclined and am thinking about doing it myself. Is this a job that should be done by someone that knows the ins and outs of Mercedes? If I do it myself, is there anything I should be aware of?
Does the head itself normally warp? Does the block usually crack?
Where can I purchase "Special Tools"?

My wife did drive it couple of weeks ago with low coolant and said it got hot! I'm not sure how hot it got but am sure that is why the head gasket now leaks.
Thanks in advance.
Sounds like a new head is needed, in which case $2200 is a steal. What did the dealership say would all be done.
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Old 09-23-2010, 07:35 AM   #3 (permalink)
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The $2200 was just to replace the Head Gasket.
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Old 09-23-2010, 07:40 AM   #4 (permalink)
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That price is ridiculous if they're only swapping a silly gasket. Ask for an itemized list of parts and services to be supplied with this procedure.
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Old 09-23-2010, 07:45 AM   #5 (permalink)
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Especially when a gasket there is a good chance a gasket wont fix it.
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Old 09-23-2010, 07:48 AM   #6 (permalink)
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Is this something a backyard mechanic should do?
I looked at the Maintenance Manual didn't look to bad except for some special tools needed.
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Old 09-23-2010, 07:58 AM   #7 (permalink)
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There should only be two special tools needed for this procedure; the 12 point star socket for the head bolts, and something to pull the chain rail pins (x 2). But first you need to ascertain the source of the coolant leak. It could very well be a cracked head, and if that's the case, you're in for a new head, as I've never once seen a documented example of an original #14 head being successfully welded up and "fixed". A straight headgasket swap is more time consuming than complicated.
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Old 09-23-2010, 06:41 PM   #8 (permalink)
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I've replaced head gaskets on those that leaked down the RH side of the block. I've never encountered a cracked head and the valve job, true up the head, followed by head gasket fixed it.

$2200 is about right considering the book is probably 12 hours @ $120/hr plus gaskets, shop supplies, etc.

You can do this yourself. Not too bad.
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Old 09-26-2010, 09:05 PM   #9 (permalink)
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seems that your car need a new head, 87's 300 D have a weak head, if was overheated 90% chance of having a crack. Don't bother having it fixed, you'll waist time, money. Better have a rebuilt one, they'll run about 1,500 ready to put on, plus gaskets.
I've been in that situation before.
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