chain guides versus plenum job

[natsoundup]

Just curious... What is more mechanically challenging..

A chain guide job or an under the plenum/knock sensor job.

Time is really not an issue. I would suspect the under the plenum hose job would take much longer.

Please rate the jobs in your opinion. 1 being the easiest (like a gas filter change or upper radiator hose change) , 10 being the most difficult (something only for a master tech)

I am just curious.

[elwesso]

Seeing how I havent done it, Id rate it as a 9 or so..... The plenum is easy, it just takes a while.. Its brainless (to me), you just take it apart and put it back together.....

lots of risks with the guides, you have to secure the chains and thers just a lot of sutff that Im not sure a DIYer would want to attempt... If I ever did the guides I wouldnt try it the easy way, Id do it with the valve covers off, which adds a LOT of labor...

[SFBayQ45]

Word from the wise regarding chain guide replacement performed by a master tech:

Q45tech - "Our most experienced tech has done over 100 guide replacements and only had 3 slip in the last 3 years, the other experienced tech has done 10 and had 2 slip. "

Word from the wise regarding possible repairs after in improper chain guide replacement that resulted in a timing slip (if it hasn't already destroyed your engine):

DAEDALUS - Depends on the shop. Slipped timing is the risk an honest, competent shop takes. If it slips, they fix it and you get a valve cover resealed for free. A shady shop might tell you *your* car jumped time while in their possession, and *you* need to pay more to have the job done right.

The choice is up to you in terms of the risk you want to take...

[natsoundup]

I brought this up...as I was looking at Jesda's pix on the chain guides... it seemed so straight forward, except for the special tool to pull the crank pulley...

I'm not going to do a guide job on the 90, but I will do a plenum job on the 94 in a year or so....