head rebuild when changing cam

[sxi ss]

Is it essential to change valves and springs when changing cams i have no problems with my heads at the moment and I'm not going to wild with the cam just unsure about spending the $1500 to rebuild the heads

[BowTie]

Your cam provider should have told you.

Mild is usually ok on stock springs with stock redline.

If compression is good you should be fine.

[sxi ss]

Yea that's what I thought have done cams on other motors before with no problems just the place I'm dealing with wanting work I think

[BowTie]

if the cam is too aggressive for stock springs it will valve bounce near redline.

a good mechanic can upgrade your springs later without the need to remove the heads if need be.

rule of thumb is stage 1 cams dont require springs, stage 2 its usually recommended to upgrade the springs but isnt essential, stage 3 must upgrade and stage 4 which everyone dreams of requires upgrading every bloodything in there to match.

[Munz]

I'd do the springs regardless but it shouldn't cost 1500 maybe they are porting your heads while they're off

[immortality]

springs really depends on the cam.

You also need to take into consideration the age of your components. valve springs that have done 200,000km's will have lost a fair bit of pressure...

[acarmody]

I can take my springs off myself with a $50 Kincrome Overhead Valve Spring Remover. That $1500 had better include a port and polish, new springs, seals, 3-angle grind, retainers and locks.

[immortality]

MACE have CNC ported ecotec heads, rebuilt ready to bolt on with new #105 springs/retainers etc for $1590

[sxi ss]

Its a 304 the $1500 was to clean, crack test, replace valves And springs, shave the head to ensure its flat and reassemble heads that's me removing an reinstalling heads

[acarmody]

Thats way to expensive than.

[GTP 85]

You could go for exchange heads that already have the valves, seats, guides, seals and springs done.

For v6 you can exchange them for 580 all done, so i wouldnt think v8 heads would be that much more? Maybe enquire?

[blo304]

Its a 304 the $1500 was to clean, crack test, replace valves And springs, shave the head to ensure its flat and reassemble heads that's me removing an reinstalling heads

$550-600 should get you:

- disassemble
- wash head
- bead blast
- crack test
- seats cut (3-angle MINIMUM)
- valvles ground
- valve height tipped
- springs checked for seat pressure at installed height
- head faced
- new valve stem seals
- re assemble

If it needs valvle guides then bit more on top. If your head has never been recoed then i doubt it will need valves replaced. Put up specs of cam, dur @ 0.050" and lift.

[juiceie vh sle]

i just got my 304 heads reconed and machined for upgraded steam seal, cleaned , decked, regrind and valves and it was just under $500.... who ever quoted you $1500 needs a punch in the dick

[TI3VOM]

i just got my 304 heads reconed and machined for upgraded steam seal, cleaned , decked, regrind and valves and it was just under $500.... who ever quoted you $1500 needs a punch in the dick

Or just the face :P