[Healeys] 100 lifters

Thu Aug 5 08:49:20 MDT 2021

Thanks for the feedback. My tappets have never been silent. They have always made noise and though not as loud as my '68 MGB/GT that I had, they're not quiet. And after having adjusted them when I retorqued the head at 500 mile mark, they still weren't silent. They sound like my old BN1 did. And because I have louvered bonnet on this car, they seem even a bit louder, but with the bonnet up and running in the garage, they sound almost exactly like my old car. Now when I'm out driving they seem pretty silent and the engine runs very smooth.
   As for "fir" in the oil. When I drained my engine at the 500 mile mark, I ran all of the oil through a fine, paint filter and then used a magnet in the filter. Nothing appeared on the magnet. I also took the magnet and ran it through the oil before I poured it through the filter, and again nothing. I even ran the magnet through the empty drain pan after transferring the oil, and again, nothing.
   Sorry to hear about your troubles and thank you for the tips on what to listen for and what to look for. Good luck with whatever you decide to do. And just to be clear, these lifters you used are not the new "new" ones available through AH Spares. Rather they are New Old Stock ones that have been in you possession for quite a while now, right? 
   Again, good luck and hopefully the cam isn't completely destroyed and you caught it in time. 
Thanks!
Steven

On August 5, 2021 at 5:39 AM, 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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