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Tombo
 Post subject: Burnt valve?
PostPosted: Wed Mar 31, 2010 11:47 pm 
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Tomboss Breweros
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Joined: Wed Dec 31, 2008 9:57 pm
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Location: Causing mayhem in northern rAdelaide
Driving home from work tonight my clubby broke :cry:

It started with a noise a bit like a stray spark, but only under load, this quickly turned to a loud ticking coupled with rough running and a lack of power.
Only noisy under load.
So i pulled over and had a closer listen, when i rev it stationary it makes a sharp pop/tick kind of noise through the carby. To me this is suggesting an intake valve problem but i have never seen one burn, only exhausts up till now.
I'm going to do some testing tomorrow and find out what it is.

Fingers crossed it might be as simple as a riding tappet.

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Dean Hutton's first car was a Mini.

kimini wrote:
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drmini in aust
 Post subject:
PostPosted: Thu Apr 01, 2010 7:37 am 
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religious status
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Location: near Baulkham Hills, NSW
Intake valves don't burn, but they can stick in the guides.
If it's spitting out the carby rhythmically, I'd pull the head off.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Tombo
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PostPosted: Thu Apr 01, 2010 2:13 pm 
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Tomboss Breweros
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Location: Causing mayhem in northern rAdelaide
Tests showed a blown gasket between 1 - 2.

Time to get rid of the bolts and fit some new studs....

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Dean Hutton's first car was a Mini.

kimini wrote:
:mrgreen: It's the boobs and testosterone that make this place fun-ner :lol: !!

Jimmyinamini wrote:
It's not nice to throw spank on the floor.
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TheMiniMan
 Post subject:
PostPosted: Thu Apr 01, 2010 8:56 pm 
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Bimmer Twinky
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Joined: Mon Sep 06, 2004 4:36 pm
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Location: Brisbane
what type of head gasket was it???

:-)

hee hee,,,sorry, couldn`t help it

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.
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Tombo
 Post subject:
PostPosted: Thu Apr 01, 2010 10:43 pm 
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Tomboss Breweros
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Location: Causing mayhem in northern rAdelaide
I have no secrets, it is one of those aluminium colored ones. I'm not a big fan of them so i'm putting a monotorque, never had an issue with them :wink:

But there could be an issue with the old re-re-re-used bolts, i've never been too sure about the torque required for them either due to the coarse thread.

_________________
Dean Hutton's first car was a Mini.

kimini wrote:
:mrgreen: It's the boobs and testosterone that make this place fun-ner :lol: !!

Jimmyinamini wrote:
It's not nice to throw spank on the floor.
Top
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drmini in aust
 Post subject:
PostPosted: Fri Apr 02, 2010 7:21 am 
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Those old head bolts are bad news, they are all brittle now. They snap off at top of block.
Get thee some proper studs and nuts.. :wink:

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Tombo
 Post subject:
PostPosted: Fri Apr 02, 2010 8:37 pm 
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Tomboss Breweros
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Joined: Wed Dec 31, 2008 9:57 pm
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Location: Causing mayhem in northern rAdelaide
Yesterday got a new stud, nut and washer set. Opened it up today and found this. Now this is the gasket that blew to coolant November last year and 90% re-sealed itself, got my moneys worth :roll:

1-2 clearly blown through, 3-4 only had the fire ring, no fibre material, 2 and 3 both leaking through to coolant, and underneath 1 and 4 leaking through to coolant too :lol: Some sort of record for me..

Image

_________________
Dean Hutton's first car was a Mini.

kimini wrote:
:mrgreen: It's the boobs and testosterone that make this place fun-ner :lol: !!

Jimmyinamini wrote:
It's not nice to throw spank on the floor.
Top
 Profile  
 
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