[Healeys] 100 lifters

[Bob Spidell]

I was going to suggest a 'gun-drilled' cam from DWM, but it appears they 
don't make them for the 4-cyl cars. Putting extra oil on the wear 
surfaces has to be a good thing.


On 8/5/2021 5:39 AM, Michael Salter wrote:
> The first sign of problems was having to adjust the tappets which had 
> initially been silent after 2000 miles and then again at 4500.
> After adjusting they were still audible and had previously been silent.
> Then at the 2000 and 4000 mile oil changes there was "fir" in the 
> drain plug magnet.
> I'm very disappointed to have destroyed a very low mileage "M" cam and 
> a set of NOS lifters that I had been saving for decades.
> I'm seriously considering having silicon nitride lifters manufactured 
> but at over $1000 a set its a serious investment.
>
> M
>
> On Wed., Aug. 4, 2021, 10:47 a.m. Steven Kingsbury, 
> <airtightproductions at icloud.com 
> <mailto:airtightproductions at icloud.com>> wrote:
>
>     I just rebuilt my 100 engine and purchased my lifters from AH
>     Spares in the UK. These were their new design for better oil flow.
>     I now have 1000 miles or so on the new engine and once I got my
>     problems figured out with my distributor, the car is running well
>     and smooth.
>        Now I'm wondering when the other shoe is going to drop! What
>     problems did you have pointing you to the lifters as the source of
>     those problems? When I retorqued the head, I readjusted the
>     rockers and found no problems. They were a little off, but I
>     expected a little.
>        What should I be looking for? I used Driven Break In oil and
>     then I switched to VR1 like you after 500 miles. I have been
>     driving the car to build up some trust in it and it's turning in
>     to a joy to drive. I've got M mods on this engine, cam, H6 carbs,
>     M pistons and these new lifters. So far, so good.
>        Thanks for your help,
>     Steven Kingsbury
>     BN1
>
>     On August 3, 2021 at 5:19 PM, Michael Salter via Healeys
>     <healeys at autox.team.net <mailto:healeys at autox.team.net>> wrote:
>
>>     After only 6000 miles the NOS BMC lifters that I installed in my
>>     engine with a very low mileage "M" cam have started to deteriorate.
>>     This engine has had a steady diet of VR1 non synthetic and it has
>>     had 4 changes in 6K miles.
>>     Very disappointing.
>>     I'm  considering trying bucket type Buick lifters with longer
>>     push rods and a new cam.
>>     Does anyone have experience with the durability of the old Buick
>>     lifters ... getting a little desperate here.
>>     Fortunately I caught this issue before it ruined the engine.
>>
>>     M
>>

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