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Cometic MLS head gaskets |
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brownspirit
AMC Addicted Joined: Mar/07/2009 Location: Georgetown, MA Status: Offline Points: 1021 |
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I’d say $500 to have a machine shop do it in the process of an engine build at the most. Personally the money is not important to me. It’s nothing compared to the headaches and bs I’ve had with this engine. I’ve never been screwed this bad before, I’ve wasted a year on getting head gaskets to seal on this turd. Now it should come out, again, be torn down, machined by a second machine shop who likely wants nothing to do with an engine someone else built. I think RD is probably right, and I feel like I should be able to do it, but I just can’t get over that fact that I’m in this position. At this point I don’t think there is much to lose. Andy
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69' BBB AMX 390/4-speed
69' s/crambler project 69’ International F210d Cummins/5+4 |
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DragRacingSpirit
AMC Addicted Joined: May/27/2009 Location: Mo Status: Offline Points: 903 |
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You can do it yourself pretty easily. My Indy heads had the location marks on the casting so they were easy to locate. Put the head in a milling machine, get it squared and straight and drill it through. Also, I didn't use 3/8 studs I actually used 5/16 and it worked just fine. Make sure and cut a spot face for the hardened flat washer so it is flush and square in the casting. After the head casting is machined put the head onto the block and use drill guides in the castings hole to mark the spot on the block. Start small and work you way up slowly and carefully. The main thing is to get is square with the deck. It really isn't that hard to do. If you are careful you can do it without tearing the whole engine down but it needs to be out of the car imo.
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Best 1/4 mile 8.99, 1/8 mile 5.71, 60 foot 1.27, no power adders
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DragRacingSpirit
AMC Addicted Joined: May/27/2009 Location: Mo Status: Offline Points: 903 |
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Also, I understand how you feel from reading your posts that you are really frustrated right now and I am not cutting on you at all, but if you would listened to advice from people that have been there and done that your issues would have been long behind you and you would be having fun going down the track.
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Best 1/4 mile 8.99, 1/8 mile 5.71, 60 foot 1.27, no power adders
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brownspirit
AMC Addicted Joined: Mar/07/2009 Location: Georgetown, MA Status: Offline Points: 1021 |
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No sweat man, I appreciate all the comments and looking back your right. I just can’t get over the fact that the guy who built this engine has been racing and building these engines for close to 50 years. I didn’t just hatch up this anti-extra head bolt scheme myself, a well respected builder made the call. I can’t even bring myself to call him again because I will be sent into a tailspin if he says again that I don’t need the extra headbolts. He has remained adamant that they are unnecessary and even told me to try a set of fle-pro gaskets. It probably doesn’t seem like a big hurdle to some guys, but I don’t have the time to be be pulling the engine every couple months and hope that it’s fixed, go to the track and be disappointed again. I’m I crazy for feeling like I got f-ucked, cause I absolutely feel that way. Andy
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69' BBB AMX 390/4-speed
69' s/crambler project 69’ International F210d Cummins/5+4 |
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brownspirit
AMC Addicted Joined: Mar/07/2009 Location: Georgetown, MA Status: Offline Points: 1021 |
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But moving forward, why 5/16” as opposed to 3/8”, where you concerned about the amount of material there. Do you remember how deep you went with them? Also, there is a special punch that can be used to modify the MLS gaskets without any concern of creating an issue? It looks like a fairly thick piece of stainless (???). If I had a milling machine in my garage I probably wouldn’t be crying on the internet about doing the modification. I will need to bring them to the local machine shop and have the holes drilled and washer surfaces cut. Thanks again, Andy’s
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69' BBB AMX 390/4-speed
69' s/crambler project 69’ International F210d Cummins/5+4 |
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DragRacingSpirit
AMC Addicted Joined: May/27/2009 Location: Mo Status: Offline Points: 903 |
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I had the hardened 5/16 arp studs, machine washers and 12 point nuts that were laying around intended for a Buick build that never got used. So I used them. I will double check on that though, it's been awhile. I'm thinking they were 5/16 but I could be remembering wrong and they could be 3/8 ? When you drill the block deck you will drill through into the water jacket. When it goes through you know that you are deep enough. I don't think you will be able to use a gasket punch on a MLS gasket ?? If they are steel shim gasket you might be able to cut them with a laser, a water jet machine or a mill bit.
Edited by DragRacingSpirit - Jun/24/2019 at 3:21pm |
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Best 1/4 mile 8.99, 1/8 mile 5.71, 60 foot 1.27, no power adders
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pfordamx
AMC Apprentice Joined: Sep/13/2010 Location: OKC Status: Offline Points: 173 |
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ours is currently out of the car to get extra head bolts and oringed if it doesn't make passes this time i don't know what else to try. but our experience over the past year do what ever it takes to get it done.
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brownspirit
AMC Addicted Joined: Mar/07/2009 Location: Georgetown, MA Status: Offline Points: 1021 |
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I’m sorry to hear your issue hasn’t been resolved either. I hope you can get it squared away quickly, personally, I just want this thing out of my garage at this point. Andy
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69' BBB AMX 390/4-speed
69' s/crambler project 69’ International F210d Cummins/5+4 |
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4303 |
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On mine I had better luck with the fel pro gasket, the cometics seeped just a tad, I also have the extra head bolts, 3/8th
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pfordamx
AMC Apprentice Joined: Sep/13/2010 Location: OKC Status: Offline Points: 173 |
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seeping out of the motor doesn't really bother me its when it fills the cylinder that its an issue.
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