[Healeys] Saturday Night Rant

[Perry]

6 cylinder tappets
0.937 inch diameter
2.548 inch length
Perry

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From: Michael MacLean
Sent: Sunday, May 3, 2020 6:47 PM
To: Steven Kingsbury; Healeys
Subject: Re: [Healeys] Saturday Night Rant

OK, to further muddy the water up.  I measured the diameter and overall length of two different tappets according to the original service manual. (reprint)  The diameter is spot on for both tappets.  The follower with the four holes has the correct overall length.  The three hole tappet is taller, but the bottom of the pocket where the pushrod seats is recessed further in  matching the height of the four hole tappet seat.  So now they both will work?  If that is the case I'm leaning toward the four hole version for two reasons.  One, it has the correct overall length.  Two, oil will flow back out the tappet back to the pan better.  Less weight going up and down too.  Am I going in the right direction here?  Anyone have the dimensions for the 6 cylinder tappets?
Mike MacLean
On Sunday, May 3, 2020, 2:10:10 PM PDT, Steven Kingsbury <airtightproductions at icloud.com> wrote: 


Mike,
   Yeah, don't know what to say. I have this style in my car, all eight of them. Are they correct? Who knows? As much of the work done to this car before I got it, I have no idea is they are correct or not. I'm going to use them as they are all the same and the car did run with them, so once I'm finished, I'll see if it still runs and hopefully, runs better than it did.
   Again, good luck~
Steven  

On May 3, 2020 at 11:12 AM, Michael MacLean <rrengineer.mike at att.net> wrote:

I don't want to argue the point, but on the Moss website the difference between the two lifters serves to confuse me even further.  The two pictures below are from the Moss website.  The lifter with what appears to be three holes is the illustration they give for the 100-4 tappet.  The other picture with the lifter with eight holes is the illustration they give for the six cylinder car.
Mike MacLean

On Sunday, May 3, 2020, 10:33:13 AM PDT, Steven Kingsbury <airtightproductions at icloud.com> wrote:


Mike,
   I just happen to have the head off of my car and all of my lifters are the same. Looks like you have two the same as my eight. I measured the height, 3 1/8" (maybe a smidge either way), 1" in diameter at the base, 1/2" outer diameter of the cup holding the pushrod and 2 3/4" from the base of the lifter to that same cup. Eight holes in each lifter and all recessed same as your two.
   Not sure what else to tell you other than I am finding all kinds of things wrong with the previous work compared to my shop manual and I'm not even a mechanic! It just proves to me that these engines want to run! No matter what folks do to their inards! 
   Good luck and hope this helps.
Steven Kingsbury
BN1 in progress


That parallax view of the camera lens makes the measurement look off, but it's 3 1/8". Good luck!!



On May 2, 2020 at 10:30 PM, Michael MacLean <rrengineer.mike at att.net> wrote:
Here's today's Healey 100 rant.  As you can see in the picture of the eight lifters, two are not the same as the rest.  I bought these several years ago from Vicky Brit and they all had the same part number, but they are not the same.  Two of them have eight holes in the body.  The rest have three holes.  The two that are different are almost an eighth of an inch shorter than the other six.  That can't be good.  These are the things I run into that slows progress on this engine.  I suspect the two different ones are for a different application.  Can someone tell me what the correct overall height of a 100-4 cam follower is?  For all I know I might only have two correct lifters.
Mike MacLean



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