View Full Version : Testing cylinder head
stevie78
18-08-10, 09:56 PM
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
18-08-10, 09:58 PM
Is the head built up. With cams etc?
stevie78
18-08-10, 10:01 PM
nope just the bare head
stevie78
18-08-10, 10:07 PM
dnt have the tools or the knowledge m8 whats it goin 2 cost me any ideas
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)
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.
relap and stop text typing ;)
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
19-08-10, 05:57 PM
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
19-08-10, 09:11 PM
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
19-08-10, 09:20 PM
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
19-08-10, 09:33 PM
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
19-08-10, 10:00 PM
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.
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,
you can get an attachment for a drill to lap them in properly, but it costs quite a bit
craig green
19-08-10, 10:24 PM
Hardly satisfying as you put it.
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.