Lifter Clatter....

[Grant Lenahan]

OK, this will nto be a revelation, but its an attempt to help :-)

It sounds, to me, like you dont have enough oil pressure to keep the 
hydraulic valves inflated at higher rpm.
Thin oil. Low O/p, blocked passage, poor alignment of block --> head 
passags,

... or just old lifters.

Grant
On Jul 8, 2006, at 11:55 PM, Matthew Kramer wrote:

> Hi,  I am kind of a lurker on Audifans at this point.  I spend most of 
> my time over at Motorgeek.com.  Anyway, I've been having a problem 
> with lifters on my 4ktq.  I used a KH block and an NF head for my 
> rebuild and so far the lifters in #5 won't seem to pump up.
>
>   It's quiet until about 2500 then they start this extremely loud 
> lifter clatter like something is coming apart.  I took out the valve 
> springs a week ago and found basically nothing.  I was hoping for a 
> broken spring.
>
>   The only thing I have come up with so far is some sort of oiling 
> incompatability between old blocks and new heads.  I am guessing you 
> used some form of NF/NG head.  If so I hope you had the coolant 
> passage welded.
>
>   Anyway,  I was just interested to hear what you find out and if your 
> problem goes away.   I've heard that non-detergent 30w dino oil is the 
> best for break in because you need some friction for proper 
> break-in.....
>
>   Good luck
>   Matt
>
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