Chance Of Valve Damage?

[6paksilvia]

I changed a timing belt on an RB25DET for a family member and unknown to me, a spacer or collar (what ever it was) found it's way where it didn't belong .

This caused the inlet cam to become retarded by 2 teeth and the exhaust cam to advance 2 teeth.

Resetting the cam timing and the engine to runs like a bought 1 (it wouldn't start befor).

The obvious question is, was there any potential to have damaged valves/pistons?

My main concern is that the boost gauge is showing about 11" mercury when idling. This seems low to me but I never paid any attention to the gauge pre busted cam timing.........

Other than that, engine is smooth as silk with a rock solid idle speed.

[Simon-S14]

i would say no... several teeth out wouldnt be enough to do any major damage, trust me you'd hear the valves touching the pistons when you first crank it over

[6paksilvia]

i would say no... several teeth out wouldnt be enough to do any major damage, trust me you'd hear the valves touching the pistons when you first crank it over

Cheers. Like I said it's only the low idle vacuum that bothers me, but that could be a dud gauge or crap hose.

[rinmak]

Cant really comment on the 2 teeth you picked up but ide say if the changes were made from TDC then you should be ok (considering how much *safe* adjustment you can get out of adjustable gears)

What exactly did you do to cause the problem? I only ask because I have a 25 and a 20 here both awaiting a new belt so I dont want to make the same mistake

[6paksilvia]

Cant really comment on the 2 teeth you picked up but ide say if the changes were made from TDC then you should be ok (considering how much *safe* adjustment you can get out of adjustable gears)

What exactly did you do to cause the problem? I only ask because I have a 25 and a 20 here both awaiting a new belt so I dont want to make the same mistake

Somehow a steel spacer that I can only guess was from the timing belt cover got in behind the timing cover. I found it sitting between the cover and the tensioner roller. I think we (I) were very lucky, and propably the only thing that prevented major engine damage was because the owner was (suppose to be ) taking it easy due to a dud fuel pump.

Belt replacement is quite straight forward, just leave out any and all small and large belt wrecking items and it will all be sweet