[Healeys] 100 lifters

Alan Seigrist healey.nut at gmail.com
Thu Aug 12 03:20:26 MDT 2021


Looks like the ZDDP level in VR1 20w50 is pretty good at 1,400 ppm


On Mon, Aug 9, 2021 at 11:01 AM 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
>>>>>
>>>>>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive
>
> Healeys at autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/healey.nut@gmail.com
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20210812/45d2eaec/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screenshot 2021-08-12 at 5.18.51 PM.png
Type: image/png
Size: 104992 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/healeys/attachments/20210812/45d2eaec/attachment.png>


More information about the Healeys mailing list