Blyton track day

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Originally Posted by turbonutter

Thanks for being the Jinx Ian....... as you predicted it was me that dropped out with a terminally sick engine :(:(:mad:

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Is terminal an over statement or have you actually damaged the engine?

I count a blown head gasket + whatever else as terminal - engine was still running, but the exhaust was more akin to a steam train funnel:(

Here's a couple of photos of Bob's screaming 6 into 1 Corse.

I've got one of Neil's, but I'm not allowed to post it!

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Originally Posted by ProtoTipo

Here's a couple of photos of Bob's screaming 6 into 1 Corse.

I've got one of Neil's, but I'm not allowed to post it!

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Go Ahead & post it, I was only joking:)

I take it this all happened whilst you were out on the track, was the alternator problem somehow linked as well?

Hope its not too much work to sort out what ever went wrong.

Vince.

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Originally Posted by turbonutter

Go Ahead & post it, I was only joking:)

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Ok Neil, if you're sure....

Hi,

I survived the full day despite being very marginal for drive by noise, something new for me at Blyton as never been tested in any form there before. Took the car to Croft once last year simply for a static test and this was 103 db not on track so no idea of drive by figure. Made an extra box to simply bolt on for track days but obviously should have used a larger box the one in the photo above is only 4 inch diameter so practically straight thru, will try again with a bigger box this time. Organisers said car sounded great just to too loud !

rgds Bob

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Originally Posted by Monte76

I take it this all happened whilst you were out on the track, was the alternator problem somehow linked as well?

Hope its not too much work to sort out what ever went wrong.

Vince.

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Yes the head gasket went on about lap 8 - nothing at all to do with the alternator that happened the day before.

New gaskets are quite easy, but as I am sure it was caused by Knock, then really I need to check everything in the engine, so it will be a full rebuild and probably head skim.... so lots of work.....

Well Managed to get the heads off today, for a quick look at the problem & the head gasket is blown.... This is clyinder 4

Attachment 5197

Attachment 5198

Attachment 5199

There are a few theories about why it happened, I think we are heading towards a consensus & solution, just need to gather some further information to be sure......

Sorry to see the bad news Neil.
Looks like a weak spot there with the water jacket so close. Not a lot for the gasket to be clamped by behind the Wills rings. is there any way you could bridge the casting with weld across the middle of the slot before you skim them? Maybe even deepen it slightly first if there is enough meat, still leaving a hole for the coolant to flow through but something to help clamp the gasket at those spots?