<VV> Bad listening... wrong diagnostic

[D. Monasterio]

     I could be confused on the terms used for noises description but, the 
fact is that I missinterpreted the sound of a leaking head, thinking it was 
some kind of pre-ignition.
    The engine has been loosing power  gradually so, at retightening the 
left head it recovered dramaticaly.

    A dry rocker ball sounds to me as screeching noise (know very well this 
one). Rockers, balls, pushrods positioning, springs, exhaust donuts (all 8 ) 
were ok. As per isolating which side, remember it is a Rampside and, without 
a helper, I barely hear the engine noises while driving.
    And... mine was not a question, just some way to say that even with many 
years of dealing with 'vairs I´ve not became an expert.

    All of you who can make Ventura´s... enjoy it !!

    Daniel


----- Original Message ----- 
From: "J R Read_HML" <hmlinc at sbcglobal.net>
To: "D. Monasterio" <dmonasterio at megared.net.mx>; "Corvanatics" 
<corvanatics at corvair.org>; "virtualvairs" <virtualvairs at corvair.org>
Sent: Friday, June 06, 2008 9:58 PM
Subject: Re: <VV> Bad listening... wrong diagnostic


> I'm not sure that I fully understood your description....
>
> But (to me) a chirp sound is a leaky head gasket or a dry rocker ball. 
> How is the rocker dry?  Somebody installed the push rod with the wrong end 
> up (out).  That, or the rocker is very tired and near the failure point - 
> but that can also sound a bit like a knock (but not really a ping).
>
> OK... I don't need to see a bunch of emails distinguishing a knock and a 
> ping - they are MY EARS.
>
> If it is EITHER of these items, it seems as if you should have at least 
> been able to isolate which side of the engine to start on first (is that 
> redundant?).
>
> It is possible that with your work, you have managed to sort of 
> accidentally lube the offending part and it will be quiet for a little 
> while.  Did you check if the push rods are in correctly?
>
>
> I'll reiterate that I may have not correctly understood the question. 
> Reiterate is NOT a musical instrument.
>
> Later, JR
>
>
> ----- Original Message ----- 
> From: "D. Monasterio" <dmonasterio at megared.net.mx>
> To: "Corvanatics" <corvanatics at corvair.org>; "virtualvairs" 
> <virtualvairs at corvair.org>
> Sent: Friday, June 06, 2008 5:25 PM
> Subject: <VV> Bad listening... wrong diagnostic
>
>
>>    About a month ago my 62 Rampside started with some kind of chirping 
>> noise (pinging ?), coming from the engine (110) at accelerating or under 
>> load. I associated this noise with timing or using of regular gas so, 
>> tried premium... no success, retarded time... no success... disconected 
>> vacuum advance... the same.
>>    Decided to drive real gently till my neurones could find a solution... 
>> no success. A week ago stored it and took "El Andariego" (67 cpe), filled 
>> up the tank accidentaly with regular (it likes premium) and, after a few 
>> miles, started pinging. Then, I began thinking (?) that this noise was 
>> similar but, not the same as in the Rampy. Could be a loose head ? or bad 
>> head gaskets ?
>>    This morning, lifted her up, checked upper head nuts... good. Removed 
>> valve covers, then rocker arms (one by one) on right head... all good. 
>> Went to the left head where 5 of the 6 rocker arm studs came out while 
>> loosening the adjusting nuts. Readjusted all the stuff hoping the head 
>> gaskets were still good. Started engine, connected vacuum advance hose, 
>> advanced timing some 5 degrees, took her out for testing.... no more 
>> noise and the engine feels and responds real good.
>>
>>    I think that many of you could have differentiate easily between 
>> pinging noise and head gasket leaking noise but, think that I need to 
>> replace the interface between my ears and brain. I should pay more 
>> attention the next time.
>>
>>    Daniel Monasterio
>> PS. Will miss Ventura (sniff) but... the GB is not finished yet.
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