Lancia Motor Club

Model Technical and Interest => Fulvia => Topic started by: zagatoboy on 30 January, 2011, 01:21:30 PM



Title: Bore honing
Post by: zagatoboy on 30 January, 2011, 01:21:30 PM
I've been advised to use a 'Glaze busting honing machine' on the block of my Fulvia before putting the pistons back in, it's not been rebored and is original, has anyone ever done this to a Fulvia?


Title: Re: Bore honing
Post by: zagatoboy on 30 January, 2011, 01:39:32 PM
Just found the following;

Best Answer - Chosen by Voters
OK I'm gonna get flames for this but you can look it up in the SAE (society of automotive engineers) and they back me up 110%. DO NOT hone any cylinder that has not been bored. Honing is meant only for removing the marks left behind a cutting tool. There is no such thing as "GLAZE" anyone who says so is seriously misinformed. The need for honing a perfectly good cylinder is an urban myth. It will NOT help the rings seat. It will NOT provide any benefit. It is a complete waste of time, effort,money and new parts. It will increase wear on the piston and new rings, fowl your crankcase with metal shavings and just generally phuk up a good engine. Read the below, meditate on it and do the homework before ya flame me. Done over 50 rebuilds with out ever putting a hone to a cylinder with 0, count 'em 0 failures.
Sorry Choppy but I had to disagree with ya on this one. buy a a beer in C.C. to make up for it.
All ya all get a thumbs down from me (flame suit on) :-)
Source(s):
http://f1.grp.yahoofs.com/v1/gFZmSjLihg2
2 years ago Report Abuse

Guess i'll leave it alone, we never used to do this on rebuilds and just thought it might help.


Title: Re: Bore honing
Post by: Richard Fridd on 30 January, 2011, 02:26:36 PM
hi Tony, i thought the 'crosshatch' honing pattern was to keep oil on the bores for good lubrication of the rings.i have always done it.what do the makers of the tool have to say i wonder?best regards richard


Title: Re: Bore honing
Post by: fay66 on 30 January, 2011, 04:22:11 PM
hi Tony, i thought the 'crosshatch' honing pattern was to keep oil on the bores for good lubrication of the rings.i have always done it.what do the makers of the tool have to say i wonder?best regards richard


Have a look at this video 2min .45 sec in.
http://www.pacehigh.co.uk/page3423/flex-hone-video.aspx
Brian


Title: Re: Bore honing
Post by: OckaPete on 30 January, 2011, 05:42:40 PM
I would hone it, Iv been told by guys who have rebuilt a few more than 50 engines the cross hatch / oil thing is correct. Besides I would not believe anyone who has to resort to using "110% " to backup there claim. There just seems to be a whiff of Pykie in the whole statement.
(don't want to upset anyone) Pete


Title: Re: Bore honing
Post by: zagatoboy on 30 January, 2011, 06:08:56 PM
I think i'll hone it, as the block is in situ with the crank inside i'm going to see if i can rent a machine just to take the glaze off.


Title: Re: Bore honing
Post by: phil-m on 30 January, 2011, 08:03:20 PM
Are you fitting new rings? After an engine has run there is a glaze of burnt hydrocarbons on the bore walls. This will make it difficult to achieve a good seal with new rings. A honing tool will remove this and produce (when used correctly) a cross hatched surface finish which aids the retention of oil on the bore wall. Glaze busters are just very fine honers. There is a real trick to using them though, you need to move the drill up and down the bore very quickly, it is also important to make sure none of the metallic sludge produced gets onto the crank and that the bores are thoroughly cleaned afterwards. For info I honed the bores on my Flavia and was very happy with the result.


Title: Re: Bore honing
Post by: ncundy on 30 January, 2011, 08:33:53 PM
I'd agree with Phil, I had mine honed prior to fitting new rings (standard practice in my experience) on a proper honing machine - but I had the engine completely in bits.


Title: Re: Bore honing
Post by: zagatoboy on 30 January, 2011, 09:26:15 PM
Is this the tool i will need?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120672487678&category=30917&_trksid=p5197.c0.m619


Title: Re: Bore honing
Post by: rogerelias on 30 January, 2011, 10:24:41 PM
Yep, that'll do the job, i've had one for years. 8)


Title: Re: Bore honing
Post by: fay66 on 30 January, 2011, 11:52:20 PM
Is this the tool i will need?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120672487678&category=30917&_trksid=p5197.c0.m619

Or look at the type in the video I gave the link to, I have no idea what they cost but I like the idea that it's self adjusting.

Brian
8227 8)


Title: Re: Bore honing
Post by: zagatoboy on 31 January, 2011, 07:43:58 AM
Hi Brian,
Thanks for the link, I have contacted them but it appears that the largest tool they do is 79mm and the bore size is 82mm so i'll see if they have a slightly larger version and the cost.
Thanks,
Tony.


Title: Re: Bore honing
Post by: DavidLaver on 31 January, 2011, 12:22:00 PM

Interesting link with a couple of extra tips.

http://www.guy-croft.com/viewtopic.php?f=13&t=1128


Title: Re: Bore honing
Post by: zagatoboy on 31 January, 2011, 03:23:21 PM
Thanks for all the comments, decided to go with the flex-hone from the company Brian sent a link to, seems very easy and really for removing glaze as opposed to a re-bored block that needs honing.
56 + vat for the size i need and can be re-used over a 100 times, shame i only need to use it once but if anyone else is doing the same as me you're welcome to borrow it.
Tony. :)


Title: Re: Bore honing
Post by: ColinMarr on 31 January, 2011, 03:28:55 PM
Tony,

I am sure that's the right thing to do. Good luck with it.

Are you going to fit new rings? If so, do you have a good source that you might share with us?

Thanks,

Colin


Title: Re: Bore honing
Post by: zagatoboy on 31 January, 2011, 04:28:04 PM
Colin, yes new rings and they're coming from Omicron, they're standard as it doesn't need a rebore.


Title: Re: Bore honing
Post by: fay66 on 31 January, 2011, 05:32:51 PM
Great Tony,
Can you take a few photos please when you get around to using it.

Brian
8227 8)


Title: Re: Bore honing
Post by: fay66 on 31 January, 2011, 05:41:06 PM

Interesting link with a couple of extra tips.

http://www.guy-croft.com/viewtopic.php?f=13&t=1128

Excellent link David,
 if Guy Croft is happy using the Flex Hone then I can't see it being a problem, also some good photos of "How To" and he recommends the supplier in my link.

Brian
8227 8)


Title: Re: Bore honing
Post by: zagatoboy on 31 January, 2011, 07:20:27 PM
Brian,
I'll take plenty of pic's and when i've sussed out how to attach to a message i'll show them.
Thanks for your help.