Specialist Components 7 Port Head
Turbo Mini Forums

Hello,

iam from germany an i have a problem with the sc head.
Two times the same shit thing.
I use a EWP80 Waterpump an a big alloy sidecooler.
No temp. problems.
Buuuut every time the cylinder gasket burns into the head between 2. and 3. with GEG300 or C-AHT189 Cometic.
It is overheating in this area.
I have now 14tkm on the tacho.
Perfect fuel an ignition settings.
All Sparkplugs are bown.
Its a slowly destroying process...
Other 7 port driver here?

Blowing between 2. and 3.
https://www.youtube.com/watch?v=GCPhcPThNrQ

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Have you spoken to SC? Have you checked to see if it is true in that area?

any chance of a pic showing all 4 cylinders? got to be honest they look oily as hell, and the fire ring doesnt look breached. :/ how does the block look too?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

how come cyls 2 and 3 are on compression at the same time?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

I don't think it's a head issue (well not specific to the 7-port).

I actually dry decked mine and added a hose between the core plug and the head above the clutch.

I always use an AF460 head gasket, turbo charged running 20psi, never had gasket issues.

It does look very oily and the exhaust valves look very lean.

Do you have a photo of the failed gasket?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

The valve stem seals were leaky.
Is this a possible issue for the gasket?
Lambdasensor LSU 4.9 sits in the Y and goes after about 500Km broken.
To hot, to lean?
Because dyno, the engine is not to lean.

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Tomorrow i can make picturess from the cometic gasket error.

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What is the surface finish, for the cosmetic really you need a ground finish rather than milled.

Ignition Timing
Its not a turbo engine

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Edited by CHPH on 28th Jun, 2017.

Looking at the valves it looks lean.

Lots of failed 4.9's recently on various after market non OE stuff not just minis. Usually because the sensor heater has to work harder as it's further away from the heat. Can also be caused by starting the sensor for long periods without the engine running.

Edited by Sprocket on 28th Jun, 2017.

Edited by Sprocket on 28th Jun, 2017.

11,5:1 Super+ 98oct+ That is not the Problem

timig chart looks good, but is the timing confirmed with a strobe? as the trigger wheels have been known to slip,

I'm thinking extra heat build up from retarded timing

I'm thinking maybe a random timing value ATDC.................. Maybe

pistons are well oily and bores are shiny from the pics hes put up on TMF.

i's starting to wonder if its got any ring lands left.