• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

100-4 Timing Pointer

Michael bowie

Freshman Member
Offline
Anybody tell me where to look for the timer pointer on a 100-4?
Trying to get a 54 year old dormant engine to fire...it has spark...but I am not sure I have the plug wires correct. Determining TDC would be a great help.
Michael Bowie
1954 100-4
Boerne, Tx
 

Dougal

Senior Member
Country flag
Offline
Well I have just been through this exercise myself and fired my 54 up after 7 years and an engine rebuild just this weekend. The timing marks on the 100 are not extensive. There is a small hole drilled on the crankshaft pulley to indicate TDC and some timing chain covers have an arrow stamped on them. I am lucky my cover had a small tab welded on with a couple of marks. If you don't have a pin/tab/mark/arrow on your cover you can still get to the right place by first finding TDC.

I put some masking tape on a screwdriver put it carefully into No1 cylinder plug hole (the one nearest to the radiator) . By marking the depth of the screwdriver on the tape, removing it and rocking the car forward in gear and repeating, I was able to find the point where the piston was at its highest. Just be careful not to scratch your bores or piston. Once at TDC you can mark the timing chain cover at a point where it corresponds with the hole in the pulley. If you peer down from the front of the engine looking at the hole in the pulley and bring your line of sight to the left edge of the water pump body you can repeat the procedure and look at the same mark.

Your actual timing mark should be 6 to 10 degrees before this. As the pulley goes clockwise a second mark to the left of the first TDC mark (looking from the front of the car) should be approximately in the correct spot.

To get your distributor in about the correct spot you need TDC again but making sure you are on the compression stroke i.e piston up and valves closed. I simply did the screwdriver thing but with the rocker cover off checked that both the rockers on valves 1 and 2 rocked.

You can google the approximate orientation of the distributor to allow you to get the advance copper tube connected and not interfere with the coil. If you insert it so that the rotor arm when the distributor is fully engaged is pointing approximately at the number 1 cylinder contact on the cap (if your looking straight down at the distributor cap its about the 2 O'clock position) you will be close.

Firing order on the cap is 1,3,4,2 remembering rotor arm rotates anticlockwise.

Good luck hope the above ramble makes sense, I am sure the good and clever people on this forum will be able to simplify what you need to do and point out any mistakes in my explanation.

While i have run my engine, i have the carbs back in bits as I found it was running incredibly rich. I mean petrol puddle on the floor under the manifold drains rich. I bought new needles but never checked them and have now found I have BN7 needles in my H6's. I can tell you they are not a great match .

Dougal
 
OP
M

Michael bowie

Freshman Member
Offline
Thanks for the reply...the counter-wise rotation of the rotor now makes total sense...I was arranging my plug wires based on a clockwise rotation. Hopefully I will get a little life tomorrow...will use some starting fluid. I do not seem to be getting oil pressure...I think I need to loosen the filter housing and fill it with oil. Anybody know a modern part number for the original canister filter? I saw a post some time ago about how to prime the oil pump...but cannot seem to find it now. Other posts say it is not necessary.
Enjoying bringing this back from the dead.
Michael Bowie
 

Dougal

Senior Member
Country flag
Offline
Hi Michael, For oil pressure i removed plugs and turned the engine over for 5- 10 seconds with a good rest gap in between. After a few attempts pressure started to build up. I did not prime or fill the canister but let the pump do its thing with the plugs out. I would not attempt to start without knowing you have some oil pressure. The counter clockwise rotation of the rotor arm got me initially as well.
Good luck, fingers crossed.
 
OP
M

Michael bowie

Freshman Member
Offline
I did as suggested...loosened the oil feed banjo fitting to the tappets and soon got a slow flow of oil. I sprayed some starting fluid in the spark plug hole, screwed in the plugs, gave the carbs a blast and tried to start it....nothing.
I have spark, but it seems weak...buy a cheap generic coil for testing? All 4 plugs get a spark...but very weak.
 
Similar threads
Thread starter Title Forum Replies Date
56HealeyDan 100-4 Timing and Vacuum Austin Healey 5
L 100 timing chain worn? Austin Healey 7
J 100/4 timing mark relocation Austin Healey 2
H 100 Engine Timing Chain Tensioner Austin Healey 3
mjobrien Timing Chain Tension for 100/4 Austin Healey 1
mbrooks 100 timing cover wanted Austin Healey 0
A 100/6 BN4 Restoration Austin Healey 4
Editor_Reid Healey 100 Frame Diagram Austin Healey 1
A 100/6 BN4 Door Lock Austin Healey 15
R 100-4 Transmission Austin Healey 1
W For Sale Selling 1958 100-6 w/ hardtop Austin Healey Classifieds 4
R Healey 100 Dipstick Stuck Austin Healey 12
T 100 BN2 Possible Ignition Issue Austin Healey 7
T For Sale New Premium Water Pump for 100-6 Austin Healey Classifieds 0
3 100 Clutch Freeplay Austin Healey 7
E For Sale Austin Healey 100 and 3000 parts Austin Healey Classifieds 1
R Big Healey 100 Head Austin Healey 4
G For Sale 100 Year Grille Badges Other British Classifieds 3
Guido36 Webers on a Healey 100 Austin Healey 6
R For Sale 100 engine block w/head Austin Healey Classifieds 3
kodpkd For Sale Alloy valve cover for AH 100-6 3000 PRICE DROP! Austin Healey Classifieds 1
A SOLD!! 1959 100-6 Austin Healey Classifieds 0
dougie '56 100-4 Racer For Sale Austin Healey 12
longbridgehealey SOLD!! 1957 100-6 BN-4 Austin Healey Classifieds 0
longbridgehealey Letting the 100-6 Go Austin Healey 26
P Wanted Wanted: Healey 100-4 frame Austin Healey Classifieds 4
M For Sale Austin Healey 100-4 Lemans Kit OEM Austin Healey Classifieds 5
A 100-6 Brake Lights Austin Healey 2
prb51 100-6 Brake Master Cylinder Bore Austin Healey 5
C What to do with my late father's Healey 100 Austin Healey 5
P 100/6 Front Wheel Alignment Austin Healey 10
andrea 100-Six Photo Album Links Austin Healey 1
prb51 Wanted Wanted...hardtop for 100-6 BN 6 2 seater Austin Healey Classifieds 1
prb51 100-6 Drum Brakes Austin Healey 9
S 1958 100/6 Bumper Brackets Color Austin Healey 2
S Wanted Used Austin-Healy 100/100-6/3000 Restoration Guide By Gary Anderson And Roger Moment Austin Healey Classifieds 14
Michael Oritt 100 Flywheel Weight Austin Healey 16
healeynut For Sale 100/4 block and head Austin Healey Classifieds 1
boxofparts 100-4 Engine Options Austin Healey 12
BoyRacer 6 cylinder flywheel on a 100 engine? Austin Healey 0
K 100-6 Interior Austin Healey 4
K 100-6 Exhaust Front Mounting Bracket Austin Healey 2
C Wanted Austin Healey BN2 100-4 Austin Healey Classifieds 2
R 100 Motor and Gearbox Available Austin Healey 2
B Austin-Healey 100-6/3000 Electrical Drawing Austin Healey 2
B Austin-Healey 100 BN2 Electrical Diagram Austin Healey 0
B Austin-Healey 100 BN1 Electrical Diagram Austin Healey 0
K For Sale TR3 front passenger side fiberglass floor panel.....$100 CAD OBO plus shipping. Triumph Classifieds 3
C For Sale Parts, Factory Manual, Restoration Guide for 1959 100-6 Austin Healey Classifieds 4
T 100-Six Clutch Recommendations Austin Healey 5

Similar threads

Top