canthai55 Posted May 6, 2021 Share Posted May 6, 2021 2 hours ago, Cake Monster said: Any other Metal, and the press Tools would crack under useage ( Hot Stamping ) Metallurgy and heat treatment has come a long way since then Link to comment Share on other sites More sharing options...
Olmate Posted May 6, 2021 Share Posted May 6, 2021 38 minutes ago, Tarteso said: Just found and order the 10 new Bolts ???? Another issue I found are the valves, they are very oxided so I will clean with dremel, grease them and hope they fit with the pistons well. Need lapping.Not that hard 1 Link to comment Share on other sites More sharing options...
Cake Monster Posted May 6, 2021 Share Posted May 6, 2021 12 minutes ago, canthai55 said: Metallurgy and heat treatment has come a long way since then The large Company that I was apprenticed at made all kinds of attempts, and spent an awful lot of Money to try and bypass the " Weathering " process of the Tool Steels. This was attempted due to the high cost of holding specialist Steels over long periods of time, and to some extent the wastage during Manufacture of the Tools IE optimum material sizes Etc. And you know what ? non of it worked, and to this day its the preferred process. Yes I agree that Metrology, and Heat Treatment have progressed, but sometimes the older ways are best, and the ' Weathering " process of the Steels could never be replicated by a Gas Oven. Link to comment Share on other sites More sharing options...
Tarteso Posted May 6, 2021 Author Share Posted May 6, 2021 19 minutes ago, Olmate said: Need lapping.Not that hard Link to comment Share on other sites More sharing options...
canthai55 Posted May 6, 2021 Share Posted May 6, 2021 Hand lap valves ? What is this - 1920 ? OP - take your head into a machine shop. Have the face milled, valves ground if they need it, or new valves and new seats installed. This will give you new guides and new oil seals. Replace head on car with a 100% rebuilt cylinder head, not some back-yard, hand-lapped, I-think-it-is-OK job 2 Link to comment Share on other sites More sharing options...
canthai55 Posted May 6, 2021 Share Posted May 6, 2021 MULTI-LAYER STEEL (MLS) The ultimate head gasket design today is multi-layer steel (MLS), which is used on Ford 4.6L V8s, other Ford engines, as well as Chrysler, Honda, Mazda and others makes. This design typically has three to seven layers of steel. The outer layers are usually stainless spring steel, embossed and coated with a thin layer of nitrile rubber or Viton to provide extra cold sealing. The inner layers provide added support and thickness. MLS gaskets are extremely durable compared to other types of head gaskets because of their all-steel construction. They won't burn through, and they won't relax and take a compression set that can lead to leaks and sealing problems. MLS gaskets also reduce blow-by and improve compression by reducing bore distortion in the cylinders (less load is needed to seal this type of gasket.) But MLS gaskets require a special type of head bolt that stretches when it is tightened ("torque-to-yield" or TTY head bolts, which should not be reused). They also require extremely smooth surface finishes on both the cylinder head and engine block to seal properly. The latter can be established by any reputable machine shop - crucial if using an aluminum head and cast iron block as the head "moves" a lot Link to comment Share on other sites More sharing options...
Cake Monster Posted May 6, 2021 Share Posted May 6, 2021 8 minutes ago, canthai55 said: Hand lap valves ? What is this - 1920 ? OP - take your head into a machine shop. Have the face milled, valves ground if they need it, or new valves and new seats installed. This will give you new guides and new oil seals. Replace head on car with a 100% rebuilt cylinder head, not some back-yard, hand-lapped, I-think-it-is-OK job Good advice. If you are this far into the strip down on the Head and finding the Valves are Carbonated badly, then get the reground and seats redone ETc For the extra cost it could save you having to redo all the work, and who knows, the Head might go past being able to skim next time. 1 Link to comment Share on other sites More sharing options...
Olmate Posted May 6, 2021 Share Posted May 6, 2021 28 minutes ago, Cake Monster said: Good advice. If you are this far into the strip down on the Head and finding the Valves are Carbonated badly, then get the reground and seats redone ETc For the extra cost it could save you having to redo all the work, and who knows, the Head might go past being able to skim next time. The OP seems keen to DIY.Why not, we all need a hobby 1 Link to comment Share on other sites More sharing options...
PFMills Posted May 6, 2021 Share Posted May 6, 2021 We had the head overhauled on an old car we have, pretty sure they just used a rotary lapping plate. If it needs a milling machine, must have had a good boiling. Link to comment Share on other sites More sharing options...
Yellowtail Posted May 6, 2021 Share Posted May 6, 2021 So we're going from a coolant leak to an engine overhaul on a relatively low mileage engine.... Link to comment Share on other sites More sharing options...
Tarteso Posted May 6, 2021 Author Share Posted May 6, 2021 (edited) 1 hour ago, Yellowtail said: So we're going from a coolant leak to an engine overhaul on a relatively low mileage engine.... Aha! once the Pandora's box is opened with 200.000.kms...That’s ok Edited May 6, 2021 by Tarteso Link to comment Share on other sites More sharing options...
canthai55 Posted May 6, 2021 Share Posted May 6, 2021 2 hours ago, Yellowtail said: So we're going from a coolant leak to an engine overhaul on a relatively low mileage engine.... Recondition the cylinder head - which is already removed ... Far from an overhaul Link to comment Share on other sites More sharing options...
Yellowtail Posted May 7, 2021 Share Posted May 7, 2021 12 hours ago, canthai55 said: Recondition the cylinder head - which is already removed ... Far from an overhaul Yet you (apparently) and or others also recommending pulling the pistons to check the ring-gap. All that is fine, but were it me, I would replace the gasket and get another 100,000km out of it. Doing a valve-job will ad no value to the vehicle and will likely not improve performance little or at all. You can always do the valve-job/rebuild if the gasket kit does not resolve the issue. 2 Link to comment Share on other sites More sharing options...
canthai55 Posted May 7, 2021 Share Posted May 7, 2021 11 minutes ago, Yellowtail said: Yet you (apparently) Never recommended . Link to comment Share on other sites More sharing options...
DavisH Posted May 7, 2021 Share Posted May 7, 2021 19 minutes ago, Yellowtail said: Yet you (apparently) and or others also recommending pulling the pistons to check the ring-gap. All that is fine, but were it me, I would replace the gasket and get another 100,000km out of it. Doing a valve-job will ad no value to the vehicle and will likely not improve performance little or at all. You can always do the valve-job/rebuild if the gasket kit does not resolve the issue. If the engine has been properly maintained there should be no issues with the rest of the head. I had the same engine in a civic and it was still fine at 250K km when I sold it. No smoke issues and no gearbox issues. Perhaps clean up the values and replace the seals, and that't it. But if the op wants to keep it another 200-300K, then it may be a good time for an overhaul. 1 Link to comment Share on other sites More sharing options...
Tarteso Posted May 7, 2021 Author Share Posted May 7, 2021 (edited) 49 minutes ago, DavisH said: If the engine has been properly maintained there should be no issues with the rest of the head. I had the same engine in a civic and it was still fine at 250K km when I sold it. No smoke issues and no gearbox issues. Perhaps clean up the values and replace the seals, and that't it. But if the op wants to keep it another 200-300K, then it may be a good time for an overhaul. This is my plan, clean the valves, replace the seal rings and install the gasket after resurface the cylinder head, all with new bolts..I think this will be enough. Edited May 7, 2021 by Tarteso Link to comment Share on other sites More sharing options...
Yellowtail Posted May 7, 2021 Share Posted May 7, 2021 2 hours ago, canthai55 said: Never recommended . Yet you did comment on how easy it would be once someone else recommended it, yes? Link to comment Share on other sites More sharing options...
Yellowtail Posted May 7, 2021 Share Posted May 7, 2021 1 hour ago, Tarteso said: This is my plan, clean the valves, replace the seal rings and install the gasket after resurface the cylinder head, all with new bolts..I think this will be enough. Good luck 1 Link to comment Share on other sites More sharing options...
canthai55 Posted May 7, 2021 Share Posted May 7, 2021 1 hour ago, Yellowtail said: Yet you did comment on how easy it would be once someone else recommended it, yes? Yes I did - and NO I did not recommend he do it Link to comment Share on other sites More sharing options...
Yellowtail Posted May 7, 2021 Share Posted May 7, 2021 1 hour ago, canthai55 said: Yes I did - and NO I did not recommend he do it Okay Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now