As with any direct injection engine, I’m concerned about the PCV system gumming up my intake valves. Has anyone had troubles with carbon accumulation on the intake valves or installed a catch can to prevent it?

 

The Rock posted instructions for installing an oil catch can on his DIY post. I installed a ADDW1 oil catch in my V6 and empty it every 1500-2000 miles as there’s about 3/4 of inch of oil.

 

Thank you for posting this, but some explanation is needed, at least for me.
What is the purpose of this catch can... I did look them up online, but how does this relate to the F?

Where is it installed?

How is it installed?

 

The F Type, and all direct injection engines, inject fuel into the cylinders. In previous carbureted, throttle body and port injection engines, the fuel passes through the intake system and acts as a solvent to wash away carbon deposits from the PCV. Since no fuel passes through the intake in direct injection, the “stuff” vented through the PCV can accumulate and restrict flow through the intake.

 

Fixed it for you. The PCV valve is what's letting in the oil mist that ends up deposited on the backside of the intake valves, causing slight flow restrictions. The real problem is that over time, the deposits can build up enough on the valve stems and keep them from closing completely. It seems to affect some cars more than others.

 

Good catch. Thank you.

 

Water/Methanol Injection will also (and actually much more so) keep the top end and Valves very clean. They basically get bathed with alcohol steam/mist when the nozzles are spraying. Next time I take the engine apart, I plan on checking to see how well my WMI system is doing to keep it all clean.

Just FYI.
DC

 

TheRock, please repost the link to the how to do this, please. I found a source for the ADD W1, so would like to put one in. What caveats are there? " side effects". Thank you

 

My DIY List Link is HERE - Post#41. Only caveat, is that it is tight in the engine bay (but I have addressed that)…And just make sure the hose is strong or it heat up and collapse on you (not good).

Good luck,
DC

 

Yep it's tight in the engine bay of a V8 but muuuuch more room in the engine bay of a V6 (at the rear of the engine) so you should be good to go Valerie.
Let us know how you get on as I have been tossing up about doing this for ages now.

 

I think I'm Ok with most of it, buy good heater hose, is that 1/2 inch ID or OD? Not sure exactly where the holes were drilled.. would that be plastic or metal? It looks like a carpeted area??
Would the purpose of this be similar or replacement to squirting some sort of cleaner in a hose that I saw posted somewhere??
Thank you for your patience, my skillset is mainly water pumps, adjusting rocker arms, fuel pumps, brake boosters etc. on late 60s/early 70s british cars.