5.7 tbi bad valve spring and one fouled plug

[PrairieDrifter]

No seals on the exhaust valves isn't uncommon at all. When I started working at my uncles shop I was the guy who got to get dirty all day everyday for a long time. Ive torn down way too many motors to count and I saw plenty of engines with only intake valve seals.

 

[Chaz]

Good info,,,,thats what the machine shop guy told me,,,he said usually the intake valve leaks the most oil anyway and if the guides aint bad you don't need em on the exhaust,,,

 

[PrairieDrifter]

Pretty much yeah it's still not a bad idea to install them if you're rebuilding them but it's defintely not uncommon for them to not be there!

 

[HotRodPC]

No seals on the exhaust valves isn't uncommon at all. When I started working at my uncles shop I was the guy who got to get dirty all day everyday for a long time. Ive torn down way too many motors to count and I saw plenty of engines with only intake valve seals.

That's interesting. I don't recall ever tearing a head down that didn't, though I've not tore down a ton of them. Usually when I built a motor, the heads just went to the machine shop complete and I let them go through them completely and requested my normal, no knurled guides, replace as needed, triple angle valve job, umbrella type seals, not O rings, ohhh and these springs will need to be installed instead of the stock ones for the cam we're using. Machine the spring seat if needed. And sometimes, depending on the build, screw in moly rocker studs.

 

[PrairieDrifter]

That's interesting. I don't recall ever tearing a head down that didn't, though I've not tore down a ton of them. Usually when I built a motor, the heads just went to the machine shop complete and I let them go through them completely and requested my normal, no knurled guides, replace as needed, triple angle valve job, umbrella type seals, not O rings, ohhh and these springs will need to be installed instead of the stock ones for the cam we're using. Machine the spring seat if needed. And sometimes, depending on the build, screw in moly rocker studs.

Oh yes I saw plenty, some were factory and some had been gone through before. Being one of the few machine shops left in ND we have a shitload of small blocks and big blocks come in and any other make you could think of. We didn't do much knurling unless it was for some really high performance build, replaced guides if needed or wanted, umbrella type seals and usually got away with the factory springs with no problem unless we had a high lift cam. Then we usually grinded the valve face and installed new valve seats.