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Topic: WTF would cause this? (Read 1612 times) previous topic - next topic

WTF would cause this?

Reply #15 –
China parts are certainly a factor!  The other is the change in the oil formulation.  Roller cams in new cars began to be common in the mid 1980's -25 years ago!  The zinc required for the older engines was deemed unnecessary and eliminated.  Hence, lots of flat lobed flat tappet cams after a failed break in. 

It is a serious problem if you choose to stay flat tappet.  It's a  shoot at best if it survives the break in.

Following the instructions to a "T" is a great idea, but first find out why that thing was clacking so bad.  It sure sounded like coil bind to me (ask me how I know...).

WTF would cause this?

Reply #16 –
This is just me but I would never run a parts store oil in anything but a lawn mower.  I usually use 10W40 on break in as well as a Motorcraft filter.

What motor was this going into and what heads?  Did you use an adjustable push rod to determine the correct push rod length?  Another good thing to do is to roll the motor over by hand and see if you are getting into coil bind prior to starting the motor.

All I can say is this sucks and I do feel your pain as this happened to me once.  Never ran a flat tappet cam again, roller all the way on all our motors.

Darren

83 351W TKO'd T-Bird on the bottle


93 331 Mustang Coupe - 368 rwhp

WTF would cause this?

Reply #17 –
Back in the early 90's when my dad and I were racing (circle dirt) we had a whole batch of lifters that were doing that very same as well as alot of other cars at the track it ended up being a bad batch, bad alloy, from the manufactuer.
87 TC
HO Swap, T5 Swap, Mach Springs, CHE Upper and Lower control arms, Mach Chin spoiler, soon to be Procharged.

:evilgrin: Nitrous is like a hot chick with an STD you want to hit it but are scared of the consequences. :evilgrin:

WTF would cause this?

Reply #18 –
what is the installed height of the springs? was it checked?
1985 TC (yet another one) Fully loaded
has 225k mile  still with the factory head gasket






84  Turbo ranger  Daily driver  ($800.00 Ebay deal)
          volvo FMIC and more getto rigging than the law should allow
 

WTF would cause this?

Reply #19 –
Quote from: BogusSVO;318047
what is the installed height of the springs? was it checked?


i can assure you this guy didnt leave no stone unturned,, all the basics and advanced observations/tasks were met.  Ill bet money its just what was explained previously by way of the transition to roller cams and the lack of oil ingredients making a flat tappet less applicable now a days.