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Kind of a dumb question, but has anyone had any luck using an MLS headgasket on a factory block surface? Even though it's smooth, I don't think it's that smooth.
I really don't want to pull this block apart because the bottom end is all good, so I'm trying to avoid a machine shop trip just to deck it.
I have had zero issues, even with a stock block surface. I always use copper spray on the gasket, torque and retorque. Never had a problem.
Nobody likes a show-off Pat! ;)Quote:
Originally Posted by Pat
Attachment 61434
You would be amazed at what the blocks look like on some of the headgasket jobs I've done and they've never come back. People run straight tap water and the block looks atrocious. If the block surface is iffy, I spray gasket sealant on the block side only. I havent used a mls on our engines but all others I've done had a sealing material on the gasket already.
Ditto.Quote:
Originally Posted by Pat
The great daily driver experiment Shadow has a cometic at whatever the next thickness above 'stock' is because the head has been cut 2x now. Pretty sure the ding dong who did the engine in 2011 didn't touch the deck so its original chrysler. I use a maroon scotchbrite and WD-40 by hand to clean any crusty stuff and let it roll.
You can get Cometic's all the way down to 0.027" for our 8v's.
They also have 0.030, 0.036, 0.040, and some other thicker ones i can't remember off the top of my head.
I think they can do just about any custom thickness if there's not one on the shelf you need.
To breath some life back into this thread... How do you determine what thickness of Cometic head gasket you need? I'm going to have to resurface my head before it goes on and I have no way of knowing for sure if it's been surfaced before, but odds are it has. This engine was gone through by someone else. That much I'm sure of.
https://imgur.com/ZYiQkYw From my current in progress head re-do.
On the front of the head there is a recessed area on the bump out from the casting next to the t-stat box. "stock" should be around 3/32" or .090~ish deep. A pair of calipers would be accurate enough to get an idea of how much has been removed.
Unless the damage is bad a piece of flat stone or metal or plate glass and some 320-400-600 grit wet-dry will clean up the deck surface without removing as much material as a fly cutter.