Leaking Valve Cover Gaskets
Posted 25 October 2011 - 10:52 PM
Newbie here! I got a 98 626 2.5 v6 DOHC. Both Gaskets are leaking. I was wondering if I should replace all gaskets I come across, or hold fast to the cliche' "if it aint broke don't fix it". If I do need to replace anything, can anyone lead me to a good price on a gasket set or what not. If I can avoid replaceing anything other than the VCG, how can I tell if other gaskets need replaceing. Been fixing my own cars since I started driving , and being 29y I have had everything from CV joints to Oil Changes(brakes are in there somewhere and one VCG without the 626 mess on the back VC, LOL). I don't know how long the car was sitting on the lot before I bought it in 2010. But, the word was that the owner babied it. The dealer is a well trusted guy, so I believe him to a certain extent. Oh, and before I forget, can anyone give me a time estimate on a DIY job. Thanks guys!
Posted 26 October 2011 - 12:55 AM
Welcome to Mazda626.net MarineE6!
Posted 26 October 2011 - 01:06 AM
Did it in a few hours, so it's not very difficult, just make sure you don't break any vaccum hoses/fittings when pulling off the intake manifold, also don't overtighten bolts as they break too easily.
Posted 26 October 2011 - 05:38 AM
I think you misunderstood DJ. He meant as in any other gasket he comes across (throttle body gasket or intake manifold gasket) if he should replace them.
I'd personally get the other gaskets. Most likely, the throttle body gasket will tear. I'd also get the intake manifold gasket since those are metal. I'd definitely replace as much as you can, possibly going as far as the camshaft seals (maybe too advanced). I agree with "If it ain't broke, don't fix it", but what you would be doing is preventative maintenance. I don't remember what other gaskets, if any, you run in to. I do have the factory service manual, so if you need any detailed instructions I can provide them.
Welcome to the forum!
Posted 26 October 2011 - 05:42 AM
Posted 26 October 2011 - 04:52 PM
It wouldn't matter if he babied it or not, as every KL I've ever come across in the junk yard has a leaking front VCG. I didn't check the rears, but that gives you an indication that it's sort of common. I have a running joke with my friends that all Mazdas either leak or burn oil, but at least they're consistent, lol.
But, the word was that the owner babied it. The dealer is a well trusted guy, so I believe him to a certain extent. Oh, and before I forget, can anyone give me a time estimate on a DIY job. Thanks guys!
I wouldn't know what to tell you for a time estimate. I haven't done a VCG replacement on the KL, but I work super slow and check everything about 3 times. I've had many 45 minute jobs turn into a week, though, between waiting for parts I didn't know I'd need, etc. Just be prepared, and don't rip into it a 9pm the night before you have to go to work.
And welcome to the forum!
Posted 27 October 2011 - 06:40 AM
I suspect the front will take another hour.
Mine's an '02 and if yours is the same, ....
There are thirteen main bolts holding the intake on. The thirteenth is the upper of two on a bracket in the rear driver's side which is invisible...i think i used a 12mm deepwell socket on a 3/8 drive ratchet and it wasn't too bad once i found it.
Keep track of all those hoses and connectors!!Here's a few pics I snapped with my phone while I was in there if you're interested.... http://s534.photobuc...CG-egr project/
Posted 27 October 2011 - 07:51 AM
Posted 27 October 2011 - 02:11 PM
Posted 27 October 2011 - 02:14 PM
Posted 27 October 2011 - 02:34 PM
Posted 27 October 2011 - 07:33 PM
Posted 28 October 2011 - 10:55 AM
Hant, I really appreciate it. Is it front or back? For 15 bucks I have a feeling you are just talking about one. Either way, if you can let me know I can make a decison on what I am going to do.
Thanks Guys, I am very gald this forum is alive and well. Great Minds think alike, Right. Very Grateful for all of the Responses and Warm welcomes.
Posted 28 October 2011 - 11:16 AM
Posted 28 October 2011 - 11:43 AM
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