Engine Diagnostics - Intermix

[tonythetiger]

Originally Posted by Gelbster

I am biased but this is one of your best responses JFP.
Worse , you drop the engine ,pull the head(s) find no leaks ,replace them ,refit the engine and the Intermix continues (from the pesky "o" rings) !
Doing all the tedious diagnostic tests first conflicts with natural impetuosity ? I am better at the mechanical tests than the psychology -so will leave the explanation to others.

has anyone seen o-rings leak and cause intermix? Im not dropping the engine without diagnostic testing, but thought I would ask the quick question anyway....

[Gelbster]

Originally Posted by tonythetiger

has anyone seen o-rings leak and cause intermix? Im not dropping the engine without diagnostic testing, but thought I would ask the quick question anyway....

Yes. And in case you see no leaking oil/coolant on top of the engine- that is not definitive.
The Heat Exchanger may also leak internally.
See JFP's advice on having it tested.

[j.fro]

The good news about a cracked head is that while you are at it, it's not too much more to get the heads ported for a nice little power and efficiency boost. The bad news, though, is that the "while you're at it" list is long and pricey..
Clutch & flywheel
Valve springs
Re-grind valves
Rebuild lifters
Rebuild fuel injectors
Cam pads/ramps
Chain tensioners
AOS

[Gilles]

Originally Posted by j.fro

The good news about a cracked head is that while you are at it, it's not too much more to get the heads ported for a nice little power and efficiency boost. The bad news, though, is that the "while you're at it" list is long and pricey..
Clutch & flywheel
Valve springs
Re-grind valves
Rebuild lifters
Rebuild fuel injectors
Cam pads/ramps
Chain tensioners
AOS

J Fro, I am not aware that you can rebuilt the lifters and the intake ones are pricey (at least the ones for the 987 engines..)

[tonythetiger]

Originally Posted by j.fro

The good news about a cracked head is that while you are at it, it's not too much more to get the heads ported for a nice little power and efficiency boost. The bad news, though, is that the "while you're at it" list is long and pricey..
Clutch & flywheel
Valve springs
Re-grind valves
Rebuild lifters
Rebuild fuel injectors
Cam pads/ramps
Chain tensioners
AOS

IF I have cracked heads and have them repaired, the valve springs and valves are being worked as part of the package.. Cam Pads and chain tensioner guides are consumables (plastic and subject to friction, but also not that expensive) so there are getting replaced as well...and IMS, of course. What else in the valve train would you consider consumable?

[j.fro]

I had all of my lifters done by Mizpah Precision. I think the cost was around $80. Len Hoffman did the heads and recommended this company for the lifters.