Metro - carbon on the piston head?

[an0nymous]

hmm... have never use a metered torque wrench before.. I must have misunderstood. Read that as foot pounds.
That means the lowest setting on the torque wrench I have is too high.
Well, I am now well and truly screwed. Only good news is I will still tightening a little at a time and hadn't begun to crank on it hard. The others backed right out.


No screw extractors, but a mechanic friend of a coworker offered to do it.
Any suggestions on sourcing for replacement bolts?


I am so bloody aggravated right now. The fact that it's my own fault is doing nothing to make my headache go away.

[5 O'Clock Charlie]

Originally Posted by an0nymous

Any suggestions on sourcing for replacement bolts?

I looked quickly at a couple of online parts sources ( Rock Auto & the parts bin) with no luck .... my next try would be to phone GM's parts department, or try a fastener outlet store like Fastenal etc( but I'm doubtful of the last )

Or ...... there always your friendly neighborhood auto wrecker ....

[an0nymous]

*sigh*, thanks.
Dealership doesn't open until Monday. I'm guessing that is the best bet. Official name of these seems to be "housing bolts" based on the manual. Anybody know the part number?

[metroschultz]

You live in Richmond
I live in Va Beach
I have some cam bearing cap bolts and you can have them, you just have to come and get them.
I am in Ohio for the meet right now so I won't be home till Tuseday.
You are welcome to come by anytime
PM me and we can make this work
Schultz

[an0nymous]

Alright. You are a champ Schultz.
I'll PM you midweek. Hopefully by that time I'll have the broken bit extracted. I'ld try it myself, but the stakes are high if I screw it up. The top of the thing is slightly rounded and I can just see a bit merrily skipping into the threads. Then I would need an insert.
Drive safe.

[Johnny Mullet]

Did you ever get that bolt out yet?

[metroschultz]

Yeah,
What he said.
I was waiting for the PM.
Let us know whats up.
S.

[an0nymous]

Sorry guys. Had a hectic week and I meant to post and never actually got around to it. Out of town family showed up unexpectedly on Wednesday and wacky hijincks ensued. Life just returned to normal yesterday.

Schultz, sorry if you were waiting on me.

Local dealership had the bolt so I got a replacement. The head itself was dropped off at a friend of a friend who has got a small machine shop. I plan to pick it up this weekend and resume reassembly.

Not quite sure where I am going to get a torque wrench that'll allow me to go to <10ft/lbs, so I need to source something this week.

[metroschultz]

I wasn't really waiting,
I didn't want to miss you if you were on the way. (I spend a lot of time away from home)
You need an inch/pound torque wrench.
Available at most auto parts stores. (I don't know if that is a tool they lend).
If you have to buy it they are very useful.
If you can't get one you can always use "German Tork Spek"
(with a deep European accent say) "Gooot-n-tite"
After 30 years in this line I seldom use a torque wrench for minor bolts.
You will also learn, if you keep up the good work, how to tell by "feel" when a bolt has reached its limit. Then you stop before you get there.
Glad you were able to source local.
Saved a whole bunch of gas.
I could have dropped it in an envelope though.
L8R,
S.

[TestDrive]

Originally Posted by an0nymous

Not quite sure where I am going to get a torque wrench that'll allow me to go to <10ft/lbs, so I need to source something this week.

Maybe your machinist friend has one to loan you?

If not, you're looking for a 1/4" drive torque wrench rated in inch/lbs.
You're local auto parts store, Sears or sometimes even Home Depot / Menard's will have one.

They come in three styles.

1. Beam type - cheapest price - if used carefully, probably more accurate than click type.
2. Click type - middle price, good brand name counts for accuracy.
3. Dial type - most expensive, most accurate.

The specification you're suppose to torque the bolt to is 97 inch/lbs and you want that to fall somewhere in the middle 70%-80% of the torque wrench's range. They all tend to be less accurate at the far ends of the scale.