Club 80-90 Forums

The other head offered up some interest too. Both are exhaust valves, again.

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Pulley end stripdown and details: despite the bolt being "retained" with black rubber sealant, it was reasonably tight and no sign of fretting
The coolant transfer pipe is a snug fit
Oil temperature sandwich plate in evidence and the dipstick doesnt go where you expect!

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" I am going in, I may be some time"
Brave man

I discovered the purpose of the mysterious "half" tapped holes inside the crank pulley, thanks to someone on the wbx6 fb group: the Oettinger dry sump system!

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Interesting.

Any ideas yet as to why there are so many issues with the top end, broken spring, collets and valve guide dropping out. Has it overheated in a major way ?

Are all the WBX 6 engines dry sumped or just some of them. I recognise the belt tensioner by the way, straight off a 2 litre 924, though that design with the built in hex adjuster is no longer available if you need to source one.

The dry sump was a later addition, but apparently somewhat under-developed.

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I would have thought an under developed dry sump was better than wet sump any day of the week

As for the other problems, I think that its just been over-revved at some time. It had a few coolant weeps, this wont have helped temperatures in the middle of the heads. Nothing looks overheated though, other than the exhaust valve stems looking a little gummed/blackened. A sign of overheated oil?
Some owners have tried fitting smaller waterpump pulleys to increase the flow rate through the waterjacket.
I think that an oil cooler system is essential to take some load off the water cooling side of things.

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It's not unusual to have build up on the back of the exhaust valves, probably more likely from heavy breathing / crankcase pressure ?? Exhaust valves get very hot don't they.

I would agree on fitting an oil cooler system, a decent one as well, up front, there was a good discussion on this a few months ago.

Bit of an unexpected result today! Many thanks and a big favour owing to Ray Perry.

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You are just engaging in simple gauge envy now.... mines got 3 times as many letters as yours

I know it doesnt matter at all, but these details are very satisfying nonetheless!

I am also a very overdue in saying a very big THANKYOU to Aidan for passing the wbx6 offer my way. Immensely grateful for the opportunity.

I think he'll agree that its probably for the best, given the work required so far

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Looks like this engine has early type thick-wall bearings, now up on the stand ready to split the case.
And one rocker box had a Cheerios box gasket...

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Nice bit of parquet flooring in your workshop.


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RogerT wrote:Nice bit of parquet flooring in your workshop.

What, you mean that isn't his front room ?

I also need to know what cereal packet he's going to use for the rocker covers too. He'll probably need two with it being a 6 cylinder.

On a more technical note, the single piece thrust bearing does match the early case web at the flywheel end (not wanting to use words like front or rear of the engine)