MGF 1.8VVC Head Gasket Failure(HGF)

  • Jezza
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MGF 1.8VVC Head Gasket Failure(HGF) was created by Jezza

Posted 1 year 4 months ago #211683
New to forum , but not to HGF's. Last April replaced MLS gasket which had failed with upgraded elastomer gasket . Passed MOT with no advisories , on road from June to end of August with no problem. Put into garage for winter re-started early December boiled over via expansion bottle. Filled and bleed system , restarted level rise raise in expansion bottle but did boil over. Did sniff test , fluid changed colour from blue to yellowy green. Noted white smoke from exhaust , concluded HGF from fire rings into coolant. Removed cylinder head this week and noted anti freeze crystals in vicinity of cylinder non-pump end.  I have photos of block and gasket. Liners appear to marginally above block , liners nearest pump end appear marginally higher. Since 2020 the car has suffered three HGF's , it always appear to happen after storage. Do I proceed and re-install another upgraded elastomer gasket(bolts have been upgraded).Fire rings appear to be weakness. Appreciate any advice , if big job car is probably off to scrappers.
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  • Cobber
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Replied by Cobber on topic MGF 1.8VVC Head Gasket Failure(HGF)

Posted 1 year 4 months ago #211692
The liners should all be the same height, if they're different no wonder you've got problems!.

"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

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Replied by Jezza on topic MGF 1.8VVC Head Gasket Failure(HGF)

Posted 1 year 4 months ago #211695
I was under the impression that the elastomer gasket was tolerant to difference in liner heights.
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Replied by Cobber on topic MGF 1.8VVC Head Gasket Failure(HGF)

Posted 1 year 4 months ago #211697
what are the height variations?

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Replied by Jezza on topic MGF 1.8VVC Head Gasket Failure(HGF)

Posted 1 year 4 months ago #211700
All are less than 0.1mm , will need new feeler gauges to be more precise. Photos added of gasket and cylinder block
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Last Edit:1 year 4 months ago by Jezza
Last edit: 1 year 4 months ago by David Aiketgate. Reason: Inserted pics

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Replied by Jezza on topic MGF 1.8VVC Head Gasket Failure(HGF)

Posted 1 year 4 months ago #211778
Liner heights measured above block min 0.04mm and max 0.08mm. Suggestion is upgraded elastomer gasket.
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