[Healeys] Rebuilt Engine Compression

[Hank Leach]

Upon assembly of a 100 engine, if you replaced the cam, cam gears
etc.with new parts, the indicated punch mark for the 100 is not
correct. IT IS ONLY CORRECT FOR A 6-CYLINDER engine. You cannot use
the mark and must follow the diagram in the manual and add a mark
after you locate top center to the cam angles. (photo) They do not
sell a cam sprocket for the four cylinder engine and you must correct
the one supplied or your valve timing would be way off as you found
with no compression. You should have 120-150 lbs on each
cylinder-equally-even with an new engine that does not have the rings
seated. After correcting the cam timing be sure that the distributor
is not 180 degrees out. Good luck, Hank

	-----------------------------------------From: "Mike Sinclair" 

To: healeys at autox.team.net
Cc: 
Sent: Monday June 12 2023 10:08:09AM
Subject: Re: [Healeys] Rebuilt Engine Compression

	Is it possible to install the cam backwards? It is on some cars. 

	Mike
 On 6/12/23 6:52 AM, Ron Osowski via Healeys wrote:
  Compression reading that low suggests that the cam may not be
properly indexed to the crank. Have you double checked the timing
chain installation since the rebuild?

	----------------------------------------- From: "Patrick and Caroline
Quinn via Healeys"
 To: "healeys at autox.team.net"
 Cc:
 Sent: Monday June 12 2023 2:05:10AM
 Subject: [Healeys] Rebuilt Engine Compression

	Hello 

	No amount of churning over with a new battery will induce the BN3’s
rebuilt engine to fire. Even towing the car up and down the road
failed to instill any life into the engine. 

	Everything is spot on – timing, spark and fuel. 

	Anyone have an idea as to what the compression be on a rebuilt engine
should be? 

	Many thanks 

	Patrick Quinn 

	Blue Mountains, Australia  

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