<VV> Noisy lifters
62vair at gmail.com
Wed Jun 25 18:10:09 EDT 2014
Mike, those were my thoughts too, and I suppose as long as there is not
excessive wear its OK to drive as it is. I don't mind the extra noise these
air cooled engines make as there is no water jacket to deaden sound however
I don't think they should sound like they are coming apart! He is using
just about the best oil there is for the application, so I guess we'll see
if it stays together.
My similar engine with 270 Isky cam makes no unusual noise at all, accept
for the sewing machine sounds of the roller rockers.
Mark Durham Hauser Idaho
62 2Door Coupe 4speed Red/Red
On Jun 25, 2014 11:00 AM, "Mike McCrae" <mmccrae6 at cox.net> wrote:
> Not a cure here, but I too had the same problem with a 3.1 I built for a
> customer. I used the deep dimple lifters with custom length pushrods
> roller rockers and a Crower high lift cam. The noise was horrible...as if
> I had no oil pressure, even though the the gauge was on 90 lbs (had to re
> shim the high volume pump and change springs).
> I replaced the lifters with Clark's best...with absolutely no change. I
> was going to change to solid lifters after this as a diagnostic tool, but
> the customer took the car and said he was happy as is.
> My only thought was the camshaft ramp....but I'll never know now...!
> Mike McCrae
> -----Original Message----- From: MarK Durham via VirtualVairs
> Sent: Wednesday, June 25, 2014 10:23 AM
> To: James Cuneo
> Cc: virtualvairs at corvair.org
> Subject: Re: Noisy lifters
> Jim, bad news. I think the only option is to replace them. I think k they
> must be racing lifters.
> Mark Durham Hauser Idaho
> 62 2Door Coupe 4speed Red/Red
> On Jun 25, 2014 9:08 AM, "James Cuneo" <jamescuneo at hotmail.com> wrote:
>> I am using valvoline vr1 20-50. It has zddp. Tapping is much less when
>> oil is cold, gets worse at operating temp. Break in oil was 30wt and
>> tapping was worse. Higher viscosity has a quieting effect. Oil flow
>> Date: Wed, 25 Jun 2014 08:53:25 -0700
>> Subject: RE: <VV> Noisy lifters
>> From: 62vair at gmail.com
>> To: jamescuneo at hotmail.com
>> CC: virtualvairs at corvair.org
>> What oil are you using, and was there a good oil flow out to the rockers
>> when you adjusted them. If the pattern is otherwise normal on the half
>> one the half moon is probably a scratch during break in.
>> Put Castrol 20w50 in it with an zddp additive and see what happens. My pt
>> cruiser has always run a bit odd on 10w30 synthetics, got tired of it and
>> went to the castrol dino oil above and the engine smoothed out and gets
>> better mileage, on that heavy oil. Go figure.
>> Mark Durham Hauser Idaho
>> 62 2Door Coupe 4speed Red/Red
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