Testing cylinder head

[stevie78]

In the middel of a rebuild putting all my gsi mpi on to a spi block .
Advise needed on testing my head turned the head upside down and with the plugs in i filled the top of the valves with fuel which 2 of drained away straight away does this mean its f-c-t if sowhat kind of cash is it goin 2 cost me 2 put right:confused:

[Pistol Pete]

Is the head built up. With cams etc?

[stevie78]

nope just the bare head

[soup1]

reseat the valves

[stevie78]

dnt have the tools or the knowledge m8 whats it goin 2 cost me any ideas

[Paul]

re-seating valves should cost no more than £50

You can do it yourself, I beleive Iainel has some good pics in his WIP

Everything you need for £6 delivered (http://cgi.ebay.co.uk/Chemico-Valve-Grinding-Paste-Lapping-Tool-/220451449692?pt=LH_DefaultDomain_3)

[bazil]

re-seating valves should cost no more than £50

You can do it yourself, I beleive Iainel has some good pics in his WIP

Everything you need for £6 delivered (http://cgi.ebay.co.uk/Chemico-Valve-Grinding-Paste-Lapping-Tool-/220451449692?pt=LH_DefaultDomain_3)

that's the stuff I used, but I adapted the wooden stick to fit my cordless drill lol, not really a recommended method to use a drill btw.

[Stuart]

relap and stop text typing ;)

[mowgli]

lapping in the valves is good for the soul. when done properly, you have the satisfaction of knowing your head is in a way better state than when you started. you also need a good valve spring compressor, ask your mates & see if a garage will lend you one, cos they can be expensive, but i got a guddun off the bay for £6.00 posted

[tom reid]

Check your valve guides for excessive wear, makes lapping the valves useless if they're worn beyond spec.
There used to be someone who did head/eng work, not too far from you, think his name was Gavin Nimmo?

[stevie78]

was goin to take it to gavin got told from a m8. that it woud cost me a fortune.prob just save up and get it done right

[stevie78]

Check your valve guides for excessive wear, makes lapping the valves useless if they're worn beyond spec.
There used to be someone who did head/eng work, not too far from you, think his name was Gavin Nimmo?just phoned a m8 to get gavins num he died two years ago:mad:

[tom reid]

just phoned a m8 to get gavins num he died two years ago:mad:

Rip Gavin.
Its going to cost to do it right no matter where you take it, but it is worth the cost.

[craig green]

Just to add.

Lapping the valves in is done with a back & forth rotary action using grinding pastes, course then fine. Using a drill to spin them up in one direction is wrong.

[bazil]

Just to add.

Lapping the valves in is done with a back & forth rotary action using grinding pastes, course then fine. Using a drill to spin them up in one direction is wrong.

correct

this is why I'm a bad example, you may think using a drill would save time and effort but it's not the proper way,

[mowgli]

you can get an attachment for a drill to lap them in properly, but it costs quite a bit

[craig green]

Hardly satisfying as you put it.