CIS Removal & ReInstall Question

[Tidybuoy]

I'm curious about removing the complete CIS in one piece.

last year, I thought I had solved all my vacuum leaks by replacing all hoses, fuel injector seals, etc... and the car has been running great all year...until it got cold. Lately, the car is hard to keep running until fully warm and surges at cold idle.

I know I need to check pressures. But until then, I thought I would check all hoses and clamps and I noticed black soot around one of the intake runners. I started to check the hose clamps and they were very loose on the runners. I tightened them all up and the car now runs almost perfect. Unfortunately, one of the six runners is very hard to get to for tightening.

In addition, I niticed that the CIS air box and whole assembly can move slightly and it looks like one of the anchor/rubber bolts is missing.

So, I'm wondering if it is possible to remove the entire CIS in on piece (with the engine in the car) so that I can inspect more thoroughly, clean up engine, and fix a few oil leaks at the same time.

Any advice would be great. Thanks in advance........Vern

[timmy2]

It can be completely removed with the engine in the car. I've done it 3 times.
If you are going to attempt it, I'd recommend you do a partial engine drop, take a lot of aspirin or your preferred pain killer... and have a large bottle of your favorite alcoholic beverage for when you are done.
How is your lower back? You're going to feel it after trying this...

I'd rather drop the engine and tranny to do it again. It's easier...

[Flat6pac]

I go with pulling the engine after 75 model

[Scott R]

This is on a 74?

[timmy2]

Picture of your engine bay would help.

[boyt911sc]

Vern,

Many has successfully removed and installed the CIS unit with the engine installed and I've done that too before. And I'll never do it again even if I get paid to do it. It is not how hard you work but how smart you tackle the project. This is a choice and some people like to do it the hard way and some the easy way.

I'll give you an example with the engine removed:
engine drop...........................6 hours.
engine install.........................6 hours.
CIS unit disassembly...............4 hours.
CIS unit assembly/test............8 hours. (Including working on the oil leaks).

Total time...........................24 man-hours.

Try it to do it with the engine installed and see how well you do it. You could easily do this project much less than 24-man-hours but I bet you won't like to do it again tomorrow!!!!! Unless you are the type of person who enjoys doing frustrating and back breaking work, then, this is for you. Keep us posted.

Tony

[Daviboy]

Done it with engine in takes its toll in the back and knuckles. Drop the engine save yourself the grief. Merry Xmas.

[Nostril Cheese]

Dropping the engine makes it much, much easier.

You can move the whole upper airbox? Is there a pop-off valve installed?