Top end tappety type noise
Discussion
Just a quick update.
Fitted Qbee's distributor ( much appreciated the box of bits you sent me they have been so so useful) and got the whole thing back together and the engine now runs the best ever in my ownership.
It purrs at tickover of 950 rpm and short term trim ascillates around zero and all other parameters are normal too.
The tappety noise at 3k is still there
So now its running sweetly I will strip it once moore and clean the tappets. Research suggests they maybe sticky/dirty. If it works great I will plan for new cam in future if it doesnt I will go for a new cam now. Opens can of worms .....what on earth to fit ?
Fitted Qbee's distributor ( much appreciated the box of bits you sent me they have been so so useful) and got the whole thing back together and the engine now runs the best ever in my ownership.
It purrs at tickover of 950 rpm and short term trim ascillates around zero and all other parameters are normal too.
The tappety noise at 3k is still there
So now its running sweetly I will strip it once moore and clean the tappets. Research suggests they maybe sticky/dirty. If it works great I will plan for new cam in future if it doesnt I will go for a new cam now. Opens can of worms .....what on earth to fit ?
ITS FIXED.........
I had a chance meeting with an old mate mechanic/engineer who took 2 minutes drive to declare "big end a little worn"
So big ends removed and crank and conrods inspected a micced up all in superb order.
All the bearings showing a bit of wear but worst was on No3 piston. Down to the copper in the middle section. This one bearing was about 5 thou thinner than new ones all the others between nothing and 3 thou.
Checked all the crank journals for roundness and all good at around 2.185 inch including no3.
New bearings fitted and reassembled and all is good. Oil pressure up a tad to(dash gauge)
Had an hours test run out and not a hint of any noise all way up to 5000 tpm.
I had a chance meeting with an old mate mechanic/engineer who took 2 minutes drive to declare "big end a little worn"
So big ends removed and crank and conrods inspected a micced up all in superb order.
All the bearings showing a bit of wear but worst was on No3 piston. Down to the copper in the middle section. This one bearing was about 5 thou thinner than new ones all the others between nothing and 3 thou.
Checked all the crank journals for roundness and all good at around 2.185 inch including no3.
New bearings fitted and reassembled and all is good. Oil pressure up a tad to(dash gauge)
Had an hours test run out and not a hint of any noise all way up to 5000 tpm.
indigochim said:
Good result, sounds like you've had quite the journey on this. At least you know everything's right now.
Yes been up some blind alleys with this but have learnt so much about the quality of whats under the skin on the engine. Discovered a few issues and dealt with them too. Well pleased and the support from everyone has been outstanding. Hope I can repay each and everyone of you in some way, you know who you are.
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