[CalgaryZL1]

Originally Posted by nighttowl

Pump vanes grenaded.
Bearings look ok, but there isnt enough metal to account for all the missing vanes.
I suspect they started breaking down when the oil pressure dropped in half and then finally gave out.

Cam lobes have some scoring, lifters are probably junk.
A main bearing was pulled, it looked good.
A rod bearing was pulled, it looked "ok".

Damn!

[Fenmore]

Originally Posted by nighttowl

Pump vanes grenaded.
Bearings look ok, but there isnt enough metal to account for all the missing vanes.
I suspect they started breaking down when the oil pressure dropped in half and then finally gave out.

Cam lobes have some scoring, lifters are probably junk.
A main bearing was pulled, it looked good.
A rod bearing was pulled, it looked "ok".

wowzers!

[MT-SS1LE]

Originally Posted by nighttowl

Pump vanes grenaded.
Bearings look ok, but there isnt enough metal to account for all the missing vanes.
I suspect they started breaking down when the oil pressure dropped in half and then finally gave out.

Cam lobes have some scoring, lifters are probably junk.
A main bearing was pulled, it looked good.
A rod bearing was pulled, it looked "ok".

Are you going with a new engine or are you going to try and salvage what you have? Hopefully you can get it repaired for much less than the $25K GM wants.

[george]

It sounds like it’s salvageable. I would think a speed shop would be able to give some good advice.

[pauly1119]

Mine goes in on Monday to get a new katech pump, timing chain and dampener. Too many horror stories for me. I’ve also decided to keep everything else stock other than these improvements. Thank goodness I have not had any issues to date and have great oil pressure.

[george]

What is the dampener? Is that part of the TSB:

“If these conditions are found, the tensioner spring in the timing chain guide may be “short” and not fully seated into the guide pivot end. (Fig. 19) Cycling the oil pump control valve will not cause any changes in the oil pump response. Replace the timing chain tensioner guide.”

[pauly1119]

Originally Posted by george

What is the dampener? Is that part of the TSB:

“If these conditions are found, the tensioner spring in the timing chain guide may be “short” and not fully seated into the guide pivot end. (Fig. 19) Cycling the oil pump control valve will not cause any changes in the oil pump response. Replace the timing chain tensioner guide.”

Yes it’s the LME chain guide. Katech recommended the brand when I spoke to them. Billet style. A little pricey but why not.

[george]

thank you