Before tearing into the engine too much check your fan belt. I had a similar
noise, thought it was in the engine. Took out the pushrods and tappets and
found nothing. Put it all back together and noise still there. I was under
the car trying to listen for the noise and had someone accelerate the motor.
Heard the noise right above my head. The belt had broken some of the metal
fibers inside and under acceleration they were swinging out and hitting the
cross bar in front of the engine. Never hurts to look around.
Pete
-----Original Message-----
From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of TeriAnn J. Wakeman
Sent: Sunday, June 23, 2019 10:26 AM
To: triumphs@autox.team.net
Subject: Re: [TR] What is the knock?
On 6/23/19 7:12 AM, Randall wrote:
> With respect to TeriAnn, I don't see how a valve train problem can get
> louder under load, since the load on the valve train does not depend
> on the load on the engine. A rod knock, OTOH, gets a LOT louder at
> low rpm and heavy load.
Next time you are adjusting valves, loosen one to about 1/4" gap, put the valve
cover back on and start the engine. Then take it around the block. Not trusting
my own diagnosis at the time I took the car to a couple shops and they all said
top end rod bearing.
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