26 replies to this topic

[carbon]

There aren't guide seals available for offset valves, as far as I am aware.

 

If the guide bore is offset by about 1mm from centre then it's highly unlikely that a standard guide seal will be able to take up this amount, and as a result there will probably be a gap allowing oil past. And once past then the oil seals will likely be holding it in a 'pool' at the top of the valve guides, so may end up being worse than having no seals fitted?

[Midas Mk1]

The head only had 4 oil seals on when I first swapped the springs over, so maybe that was the reason!

 

Tried a couple of engineerings shops near to where I work, and I'd have to supply the bronze guides, so dont think it's going to as quick as a process as I'd hoped.

 

Gonna try Minisport next, I'd happily take it to Turbo Phil, but he's a little far away from Manchester for me to take it to after work

[Carlos W]

The head only had 4 oil seals on when I first swapped the springs over, so maybe that was the reason!

 

Tried a couple of engineerings shops near to where I work, and I'd have to supply the bronze guides, so dont think it's going to as quick as a process as I'd hoped.

 

Gonna try Minisport next, I'd happily take it to Turbo Phil, but he's a little far away from Manchester for me to take it to after work

There's no traffic on the M6 once you pass junction 33.

[Midas Mk1]

Minisport have a 2-3 week lead time, so think the plan is to get the valve guides after work and hope a local machine shop will do it. 

 

Wouldnt be as easy as it sounds getting to the M6, have 30 miles of the m62 to battle first.

[carbon]

Before getting the valve guides changed I would suggest taking out all the valves and mike the stems up for any wear.

[Midas Mk1]

Thanks guys for the advice and help!

 

Rang a local (to work) Huddersfield Eng shop up who has done Mini heads, said to bring it down and it'll take a day. Went yesterday dinner time (took time out of work), to only be told it would be 3 weeks!

 

Gave R.A.C.E engineering a call in Chorley, and despite Jim testing a rally car this weekend, said if I could get there first thing this morning he'd sort it.

 

A brew, a good chat and nosey around at their projects later the job was all done. I'd highly recommend R.A.C.E, and think i've found the place for all my engine / gearbox / machining work from now on!

 

Hopefully she won't be smoking now when I fire her up.

 

[Midas Mk1]

Rightio, head sorted with new valve guides, and MPi oil seals on the inlets. No where as much smoke, but still some, took it around the block under load and the smokes still there. Was advised being a 37 32 head to not use all 8 seals, should I have done? Drives good with power just smoking on load and Reving it, any ideas?

Any advise would be greatful, getting desperate now, running out of time now before next weeks run

[carbon]

So were valve guides standard or offset, and were the valve stems miked up for wear?

 

I would have fitted seals on both inlet and exhaust, fit the new seals to the inlet guides and reuse the old inlet seals on the exhaust guides.

[Fast Ivan]

get a leak down test done

[Midas Mk1]

Valve guides were offset, 37/32 so incredibly tight. Got MPi oil seals on the inlets, thinking I should have fitted them on exhausts now too.

As for leak down test, tried that but our eBay special kit has stopped working. Compression wise it was great, well over 200psi iirc

Took it out for a hard blast on the motorway, pulled great like a right train, didn't notice any smoke on hard acceleration or deceleration, but on start up had the puffing of blue smoke and haZe for 30 seconds, and when hard revving on idle, puffs out a little blue / white smoke every time.

Is it a case of having new guides that this will need running in abit? There were reamed, valves were perfect, infact the guy noted how good they were, better than rim flows apparently.

When head was off bores looked good, as you'd expect from a relatively fresh block.

Supposed to be out on the weekend for the Anglian mini run, dunno to run it now or not 😐

Edited by Midas Mk1, 25 August 2016 - 07:15 PM.

[carbon]

I still don't understand how standard guide seals could work on offset valve guides.

 

But your symptoms are similar to what i had before I fitted seals to the exhaust guides. With seals fitted to the exhaust guides there is now no noticeable smoke from the exhaust and i am getting through a lot less oil than before.

[Midas Mk1]

Back track on what I just said, I meant the valves themselves are offset, so the guides are as per normal! Been a long few weeks trying to sort the car out! Dunno whether to run as it with just 4 seals or hold of using it and for all 8