[Healeys] spin on filters

David Nock BCS healeydoc at sbcglobal.net
Wed Aug 27 09:10:59 MDT 2014


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
>

-- 
*******************************************************************
Bob Spidell           San Jose, CA            bspidell at comcast.net

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