[DeTomaso] lifter noise

[Ken Green]

Mechanical lifters have a mechanical sound and I think if you listened to a hydraulic lifter engine and then a solid lifter engine you'd hear the difference pretty clearly.
 
You don't need to pull a head or cam to change a lifter, just the valve cover and intake manifold, and since it's a dry intake manifold, it is much easier.  But you might want to make a rough measure of valve lift on all the valves to make sure none of the lobes have been flattened if you're hearing valve train noise.
 
And, check your exhaust for leaks.  It's amazing how metallic an exhaust leak at the heads can sound.
 
Ken

--- On Fri, 4/1/11, boyd casey <boyd411 at gmail.com> wrote:


From: boyd casey <boyd411 at gmail.com>
Subject: [DeTomaso] lifter noise
To: "De Tomaso List" <detomaso at realbig.com>
Date: Friday, April 1, 2011, 8:36 AM


I have what sounds like a lifter tap. I think I have hydraulic lifters but I
have never had the valve covers off. First off is there an easy way to check
(like through the oil fill opening ) if I have hydraulic or solid lifters?
Secondly if they are hydraulic (my guess) is there a way to get rid of the
noise? I have heard of hydraulic lifters collapsing , how big a job is it to
replace a bad lifter? do you have to pull the heads? can it be done from the
top of the motor with just the valve covers off and do you have to access
the cam. If it is a big job I think it may be time to re power and go to
better heads and solid lifters etc. Any suggestions would be appreciated.
Boyd
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