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Do chev 350ci engines need leaded fuel?
If it's a real old engine ( 1979 or older ) they do because the valve seats are soft not harden,and todays fuel will take the valve seats out of the heads. If you are going to use old heads with todays gas they will have to have hardened seats put in the heads.
Cylinder head can you advice the best material for valve seats?
If valves are leaking you should have an automotive machine shop inspect and/or repair cylinder head(s) and find the cause of the problem. The machine shop can cut the valve seats to make a seal (valves, keepers,retainers may need replacement), there is no material that can be added. Also ensure the engine block is true before having work done to cylinder heads.
What lead additive do you use foe a 1973 v w karmann ghia?
None is needed. The car came from VW with hardened valve seats, and by now this specimen has had the heads changed--and all aftermarket heads have unleaded valve seats.
How do you upgrade a 1965 Thunderbird to run on uleaded gas?
Have the engine heads rebuilt using hardened valve seats.
What needs to be done to a 1968 z-28 to be able to run unleaded fuel?
Have the heads done with hardened valve seats.
Are cylinder heads on a big block mopar interchangeable?
I know you can put 383 on a 440 and 400 on a 383 but i dont know about 440 on a 383 or 400 All Big Block Mopar B/RB Cylinder heads are interchangeable, there may be conflict with intake and exhaust manifolds on the 62'-65' max wedge heads, also the pre 64' closed chamber heads used a different rocker set-up than the later heads., You can still use them on a later motor just have to use the corresponding valve-train. Any 67' model and earlier head, is of a closed chamber design and will raise the compression of a 68' and later motor. Also, any pre 76' heads will have unhardened exhaust valve seats , which means they won't last long on today's unleaded gas unless you have hardened seats installed...
How do you Replace valves in super beetle motor?
Pull the engine. Remove the heads. Take the heads and money to a machinist because he needs to refinish the valve seats. He can also test your heads for cracks, and if he finds any you need to replace the head.
What does a machine shop do when machineing a head?
When machining a head basically. Basically just shaves off the head to increase combustion or give you higher compression. This is only a partial answer. A machine shop will check the head for straightness. If necessary the shop will mill the minimum clean-up to straighten the combustion face (the part that sits on the block) of the head. Usually they will hot tank the heads to remove carbon and grease. Then most shops will check the valve seats and regrind them as necessary. The will also check the valve quides to see if they are worn. If they are they will replace or knurl them to bring them back to specification for stem slop. They should check your valve springs for proper height and check the valves to make sure the stems aren't to worn or bent. If a person desires they will mill the heads to increase the compression ration of the engine. They will also offer services where they check valve to piston clearance on heavily milled heads. Most shops will offer dye penetrant or magnafluxing services to check for cracks in the head (especially important for aluminum heads). They will also install hardened valve seats on older cylinder heads.
Does the 1969 dodge charger use leaded or unleaded fuel?
the 69 used leaded fuel, you can get the heads redone and have hardened valve seats installed and you can use unleaded with no problem.
How do you do a valve job on a Chevy 350?
* Remove the heads. * Take them to a reputable automotive machine shop to replace valves, guides and if necessary seats. * Put the reconditioned heads back in place, making sure that you properly torque the heads and perform other proper alignments as specified in the shop manual.
What is valve repair?
A valve job is where they turn or resurface the valves in your cylinder head to promote sealing. The head(s) have to come off & they grind the seats as well. The cam opens/closes the valves to let in fuel/let out exhaust.
Can you use unleaded gas on pre 1970 cars?
You would not want to for very long. The lead acted as a cushioning lubricant for the valves. You should update the valves & valve seats in the heads. Best to contact your local automotive machine shop for this job, just take your old heads into them.
