USHM3 timing chain deflection

for those with Series MM sidevalve cars produced between September 1948 and February 1953
Mick Lynch
Minor Fan
Posts: 150
Joined: Sat Sep 12, 2020 9:20 pm
MMOC Member: No

USHM3 timing chain deflection

Postby Mick Lynch » Sat Jul 10, 2021 9:25 pm

Can any one tell me the approx deflection of the USHM3 timing chain.

It seems to be excessive to my untrained eye - see photos
8E7F232E-D2C0-4CA6-8C69-A25780EC2A95.jpeg
At rest
8E7F232E-D2C0-4CA6-8C69-A25780EC2A95.jpeg (1.49 MiB) Viewed 732 times
At rest
821ED588-C18E-4E16-8D98-9FC9F1023E89.jpeg
Deflected
821ED588-C18E-4E16-8D98-9FC9F1023E89.jpeg (1.68 MiB) Viewed 732 times
And deflected.

philthehill
Minor Maniac
Posts: 9513
Joined: Thu Jul 19, 2012 12:05 pm
MMOC Member: Yes

Re: USHM3 timing chain deflection

Postby philthehill » Sat Jul 10, 2021 10:35 pm

The deflection indicates serious wear to the chain and sprockets as can be observed with the wear on the crank and camshaft sprocket teeth.
The chain, crankshaft sprocket and the camshaft sprocket should be replaced.


Mick Lynch
Minor Fan
Posts: 150
Joined: Sat Sep 12, 2020 9:20 pm
MMOC Member: No

Re: USHM3 timing chain deflection

Postby Mick Lynch » Sat Jul 10, 2021 10:44 pm

Aye, thought as much. Thanks Phil.


Who is online

Users browsing this forum: No registered users and 3 guests