[Healeys] 100 lifters

Mon Aug 9 08:50:37 MDT 2021

I use Kendel 20/50 race oils with higher zinc, or other non street race
oils for many years in my car. So far so good

Ira Erbs
1959 AH 100-6
1967 MGB
Milwaukie, OR

On Mon, Aug 9, 2021, 4:21 AM Michael Oritt <michael.oritt at gmail.com> wrote:

> Bob--
>
> I should have added that this incident coincided with a recent lowering by
> DOT of lead and zinc contents and what might have been fine a year
> earlier was no longer sufficient to protect the new cam and lifters.  I'll
> certainly plead guilty to the sometimes-specious thinking that "more is
> better", but on the other hand "less" is sometimes not enough, and therein
> lies the dilemma.
>
> Best--Michael Oritt
>
> On Sun, Aug 8, 2021 at 11:00 PM Bob Spidell via Healeys <
> healeys at autox.team.net> wrote:
>
>> Subject to debate. The literature I've seen from the oil companies stress
>> that their products are carefully formulated, and adding anything to them
>> is not a good idea. Also, ZDDP was first used as a detergent, with its wear
>> surface protection a surprising side-effect (like how tetra-ethyl lead was
>> added to gas to increase octane rating, and its cushioning and protecting
>> of valve seats was a side-effect). But, it's human nature to think "If a
>> little of this is good, a lot HAS to be better," but it's not necessarily
>> true. ZDDP is corrosive in high concentrations; the 'sweet spot' appears to
>> be about 1,500PPM.
>>
>> Ordinarily, I'd attribute Michael's failed lifters (cam?) to improper
>> break-in, but I'm sure M used proper procedures, which makes this doubly
>> mysterious and concerning. I don't know how bucket lifters would change the
>> outcome; their main benefit seems to be reduced wear of the block.
>>
>>
>> On 8/8/2021 6:19 PM, i erbs via Healeys wrote:
>>
>> Good practice
>>
>> Ira Erbs
>> 1959 AH 100-6
>> 1967 MGB
>> Milwaukie, OR
>>
>> On Sun, Aug 8, 2021, 6:09 PM Alan Seigrist <healey.nut at gmail.com> wrote:
>>
>>> 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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