The real question is what if there was a way to bypass the knock sensors? Would you do it vs paying for the kit?
If the answer to that question is "yes", you are in for a tough time keeping this engine running well.
It indicates a willingness to take short cuts...the 7M will bite you hard...
I thought that's what you were getting at...so, following that logic:
Bypass the pesky coolant temp sensor...no more code 22.
And, how about the O2 sensor too...no more code 21
Two more less things to "worry about".
See where I'm going with this?
Instead of looking for ways to bypass...
That's the problem with reading stuff off a forum...the written word is imperfect when it comes to what is trying to be communicated. No voice inflection, tone, etc...not to mention some of the grammer/spelling I've seen around here ;)
(87mgte, I don't mean you...just in general)
That's my whole point Shredder...the forces exerted against a flat tappet is far more due to the design. The rocker arm, seat pressures, and valve size/weight make a huge impact. If you look at it in a very narrow way, the cam lobe pushing against a flat shim on a 7M is the only comparison...
You're leaving a couple minor things out...like the spring pressures.
On a 7M spring pressures range:
Stock - 35 lbs
Comp Cams - 55 lbs
BC - 60 lbs
Ferrea - 67 lbs (std dual spring)
On a SBC the pressures range from 85 lbs stock to 130 lbs on a built motor...this greatly increases the...
Lack of oil supply is the cause...no amount of ZDDP is going to help that (hence the TSB).
I'm still waiting on the explanation of these "similarities" between the valve train in a flat tappet engine and the 7M. Sorry...just don't see it.
Like I said, if you want more ZDDP run a diesel...
The only thing similar is the shim surface is flat...that's it. Unless you would like to educate me on how the 7M valve train set-up is similar to the way flat tappets work in a SBC ;)
And I'd like to see a set of 7M, 1J or 2 J cams with excessive wear on the lobes.
Nick - From what I understand, the old Denso filters were pretty good...I've never had one though and did not have the opportunity to cut one open. All the ones I've seen in the US as of late are made in Thailand.
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