If the spin on oil filter adaptor is installed up side down the oil will try
to flow backwards thru the filter which it will not do.
All new cars today are using a 5W-20 and lower viscosity oil. Especially
those with VVT units. If you do not change the oil on a regular basis, or
use to this of an oil the very fine filter screens will plug up causing the
VVT units to fail. Also as you say the tensioners will bleed off and the
nylon guide break off. Causing the chains to get sloppy and noise, then
jumping time. This has been an issue for the Jaguar, Ford motors as well as
the BMW motor that is used in the Range Rovers.
At one time we were doing chains, tensioners and guides on the early Jaguar
V8 motors about 3 a month.
David Nock
British Car Specialists
209-948-8767
www.britishcarspecialists.com
-----Original Message-----
From: Bob Spidell
Sent: Wednesday, August 27, 2014 5:54 AM
To: Ahealey help
Subject: Re: [Healeys] spin on filters
Probably not the filter's fault.
As an aside, I recently got a lesson on why you should follow manufacturers'
recommendations, unless you REALLY know
better. Came across a mechanic's website who says he gets lots of business
repairing Ford Modular 4.6L V8s, like in my
Mustang. Turns out the two cams are driven by chains (good), but the chain
tensioners are hydraulically activated and
if you use an incorrect oil or filter the tensioners might not work
correctly on startup, and may break due to the chain
flopping around. The owner's and shop manual call for Motorcraft 5W-20 oil
and a Motorcraft filter with anti-drainback
valve. If you use a higher-vis oil and/or a filter w/o the drainback valve
the tensioners can break, and possibly throw
the valve timing off a tooth or two (hence his increased business).
Fortunately, since I've followed the recommendation
(for once) since new, even though I thought at first that 5W-20 was 'too
thin' and considered using up my stock of
10W-30. Not saying other good 5W-20 oils and filters wouldn't work, but
it's an expensive repair. Oh yeah, I (almost)
always pre-fill the filer when changing.
Interestingly enough, my BJ8 and, I think, all 6-cyl Healeys have a
hydraulic chain tensioner, which is made out of
steel and a hard rubber rubbing surface. Apparently, a much more robust
design (someone didn't tell the bean counters
at BMC).
Bob
On 8/27/2014 5:38 AM, Team.net wrote:
> Interesting. I just had my engine rebuilt and was unable to develop any
> oil pressure with the spin on.
>
> Had to revert to the canister.
>
> Larry
>
--
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Bob Spidell San Jose, CA bspidell@comcast.net
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