[Roadsters] Lashpad Mystery

[rodeaton]

Had it happen to me three time on L16,L18 and L20b. Did not hurt anything
and valve ajustment  
Was ok.  Yes it is a mystery

Rod Eaton
www.rodsdatsun.com
1-888-257-7773

-----Original Message-----
From: datsun-roadsters-bounces at autox.team.net
[mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of Gary and Cindy
Ault
Sent: Friday, September 30, 2011 6:38 PM
To: Nathaniel Leeds; datsun-roadsters: autox.team.net
Subject: Re: [Roadsters] Lashpad Mystery

Nathaniel,

No, I have never heard of that happening, but there are many with more 
experience than I have with the range of possible failures in U20s.

I have a hard time imagining how a lash pad could run away from home unless:

1.  The lash pad were improperly installed in the first place, or,
2.  A valve spring is weak (or broken) and floated during an aggressive 
acceleration event, and allowed the pad to escape.

The lash pads sit in a ridged depression in the valve spring retainer.  I 
don't see any way the lash pad could become loose as long as there is 
tension between the pad and rocker.

Gary

----- Original Message ----- 
From: "Nathaniel Leeds" <nmleeds at mindspring.com>
To: "datsun-roadsters: autox.team.net" <datsun-roadsters at autox.team.net>
Sent: Friday, September 30, 2011 4:20 PM
Subject: [Roadsters] Lashpad Mystery


> All,
>
> Here's a mystery.  Car was running fine, started running like crap, the 
> cause:
> one of the lashpads decided to excuse itself from the head, and migrate 
> down
> through the timing chain to the bottom of the oil pan where it sat, 
> uninjured.
> Now the mystery: why would lashpad want to run away from home?  Has anyone
> else had this problem?
>
> Nathaniel Leeds
> '69 2000 (SU's)
> Now running, on all 4 cylinders again.
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>
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