[Healeys] Rebuilt Engine Compression

[Patrick and Caroline Quinn]

G’day

Thank you to everyone who responded. Much appreciated.

We will start inspecting next weekend.

Just a reminder that the 100 BN3/1 is Warwick built Austin-Healey and is not a four-cylinder car and is fitted with an early C-series smooth crankcase six-cylinder engine.

When it’s sorted, I will send a message to the list.

Hoo Roo

Patrick Quinn
Blue Mountains, Australia

From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Hank Leach via Healeys
Sent: Tuesday, June 13, 2023 3:43 AM
To: 'Mike Sinclair' <phoenix722 at comcast.net>
Cc: 'healeys at autox.team.net' <healeys at autox.team.net>
Subject: Re: [Healeys] Rebuilt Engine Compression

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<mailto: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<mailto: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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