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Series2ian

New Member

• Jun 8, 2014

• #21

Found the problem. Head gasket had gone. Whilst the head was off I got it skimmed. I then de-coked it, lapped the valves. Cleaned, put it together. Finished it last night, started on the button, runs sweet as a nut !!!!!! Also found its a later 5 bearing crank engine.

 

dominicbeesley

Well-Known Member

• Jun 9, 2014

• #22

Did you diagnose this with a compression test or just whip the head off?

PS: Well done by the way!

 

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Series2ian

New Member

• Jun 15, 2014

• #23

I had no compression on 2 and 3. When I took the head off I found the gasket was broke between 2 and 3, hence no compression.

Took it for a 100 mile drive around Exmoor today. Was running really well, apart from when I coast down a hill in gear it backfires but when I put the throttle on, it stops! any clues?

 

joe27979

Well-Known Member

• Jun 15, 2014

• #24

try advancing your ignition a tad (turn distributor clockwise)
or check for air leaks at the manifolds

 

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Series2ian

New Member

• Jun 16, 2014

• #25

cheers for that, will try

 

dominicbeesley

Well-Known Member

• Jun 18, 2014

• #26

If it's just a bit of rumbling or mild popping and farting it doesn't do much harm...I like it giving a bit of pop on the overrun, gives pedestrians a bit of warning...

 

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Series2ian

New Member

• Jun 18, 2014

• #27

I turned the dizzy clockwise a bit and the backfiring was even worse. Went deaf after a jolly round the block, will retard it a bit. Really need a strobe to get it working like a Swiss watch.

 

dominicbeesley

Well-Known Member

• Jun 18, 2014

• #28

Remember its no use testing any adjustment unless the engine is up to full operating temperature. You still need to use the choke in summer until its warmed up or it will shotgun!