[Healeys] 100 lifters

[Alan Seigrist]

So adding zddp on top of whatever is in there is okay?  I have Castrol
20W-50 in my motor... also use the Valvoline too.

On Sat, Aug 7, 2021 at 11:11 PM Michael Oritt via Healeys <
healeys at autox.team.net> wrote:

> In about 2007 just before ZDDP content in motor oils became a commonly
> talked-about issue in vintage racing communities, I bought a new race
> engine for my MGA-powered Elva Courier from a reputable builder who
> recommended I use Mobil 1.  Somewhere during the first race weekend
> performance fell off and upon disassembly it was determined that the cam
> lobes had been damaged due to wear from the lifters.
>
> After replacing the cam and lifters I began using RP racing oil and
> throwing in ZDDP additive for good measure.  Though the Royal Purple
> probably contained sufficient zddp on its own and some folks
> cautioned against too high levels of zinc I have  continued this
> combination and have not lost a cam, etc. since.
>
> YMMV....
>
> On Thu, Aug 5, 2021 at 11:16 PM Michael Salter <michaelsalter at gmail.com>
> 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> 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> 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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>
> --
> Best--Michael
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