Cylinder heads question???
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From: Bird lover in Sharpsburg
If it were mine, I would pull all the lifters, take the core plugs out of the oil galleys and the check valves and use rifle brushes, brake clean (Wurth ONLY) and air to ensure that nothing got missed
There will be metal in the oil galleys with out a doubt.
There will be metal in the oil galleys with out a doubt.
Let me ask this question. I took my head to a shop to have them leveled or whatever you call it. They didn't do any valve work and I have looked in the head top and for good measure blasted them with a can of brake clean each (not spraying lifters). I got a few tiny shavings out but really not hardly anything.
Should I pull the lifters out and blast each with another can of brake clean? Can I damage any seals by doing this? Again, I didn't have any valve work done, just had them planed. They pulled the lifters out when they did the planing.
Should I pull the lifters out and blast each with another can of brake clean? Can I damage any seals by doing this? Again, I didn't have any valve work done, just had them planed. They pulled the lifters out when they did the planing.
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From: Irvine, CA
You want to remove the core plugs on the oil galley- in your pic it's in the upper left corner, half cut-off.
That big 22mm cover leads into the head's water jacket.
EDIT:
The oil galleys are the tube-lookin' things running the full length of the head.
That big 22mm cover leads into the head's water jacket.
EDIT:
The oil galleys are the tube-lookin' things running the full length of the head.
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From: Bird lover in Sharpsburg
Roger sells it, or if you can not get it from him I can ship it to you, you will need about a case of it, trust me you will use it for other things.
I have the recharge station to fill from bulk, and still use about a case a week of the cans.
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From: Buckeye, AZ
How much disassembly do your finished heads require for proper cleaning before installation? Do the valves need to be disassembled so debris in the valve assembly, such as guide reaming debris, can be cleaned out? If so, you should leave the heads disassembled and ship them back in parts.
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From: Bird lover in Sharpsburg
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From: Atlanta
It's not just metal shavings from surfacing or seat cutting, it's the other crap including abrasives too.
There's grinding grit from facing valves and god knows what is in the swarf of the machine tool coolant, stuff like cast iron particles.
And if the shop is half assed enough to send out dirty assemblies in the first place, they are probably using alot of abrasive power wheels to clean gasket surfaces so you can add that abrasive dust to the list of things that are going to wind up in your engine.
There's grinding grit from facing valves and god knows what is in the swarf of the machine tool coolant, stuff like cast iron particles.
And if the shop is half assed enough to send out dirty assemblies in the first place, they are probably using alot of abrasive power wheels to clean gasket surfaces so you can add that abrasive dust to the list of things that are going to wind up in your engine.
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From: Bird lover in Sharpsburg
My machine shop would never, ever send heads like that out, they are surgically clean, shot blasted (put in a big machine with steel shot, it think it is steel shot, but any way, and tumbled while the heads are held down, pretty neat machine), then hot tanked, then put into a automatic hot water washer, dried, inspected and then put together in a clean room.
They charge for this of course, but then again they do not get sued for sending out filthy parts.
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From: Buckeye, AZ
If BC's heads are a relevant example, then you seem to be saying all rebuilt heads, even yours, must be completely torn down, checked, cleaned and reassembled by the customer.
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From: SAN DIEGO
CYLINDER HEADS
Today we decided to check the two big plugs on the heads, the inside are clean but no copper washers in both of them. They would have leak if we installed them,does any members know the torque specification for that two plug 22mm on the heads? pet no 9and 10. illustration 103-00. Thanks, the heads are fully assembled how the hell am i going to clean them after already bolted them on? Carl said they were good right out of the box with full assembly lube ready to install. We installed them and decided to replace the oil check valves and the rest are ??????? paid 810.00 plus my valve guides and valve stem seals