Compression Test...Can someone tell me what's next... - Page 2

DuckRyder · 09-06-2003, 10:28 AM

Count me in on the toss the platnium's,

I wasn't going to say anything, but since we are all piling on.........

415pb · 415pb's Garage

Yep, the platinums are gone.......Hey nice RC51

sean_V8_914 · sean_V8_914's Garage

how do I go to see the RC 51 pics?

DuckRyder · 09-07-2003, 05:14 AM

The RC 51 pics are here:

http://www.bellsouthpwp.net/d/u/duckryder/

Most of them are in the "Akrapovic" directory.

415pb · 415pb's Garage

Ok, I'll be dropping the engine on Saturday. I found these on ebay:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=33623&item=2431263197

Will these work. I'm gonna pull the heads, change the pistons, rings and cylinders. Change the valves and what ever you guys suggest I do. I really dont want to split the case though. Again, thanks....

Rod

415pb · 415pb's Garage

Anybody, anybody...please.....

Dave at Pelican Parts · Dave at Pelican Parts's Garage

Work? Yeah, sounds like they oughtta. How right they'll be? What kind of quality they are? Total unknowns.

--DD

415pb · 415pb's Garage

Thanks, Dave...I'll keep searching...Hey, Dave...I see PP has both the Euro and US P/C's...Would it be advantageous to purchase the Euro?

Nevermind, just read the PP article reference the difference.

Rod

415pb · 415pb's Garage

Got the head and cylinders off for 3 and 4....here are some pics. Could you tell me what you think.

Thanks
Rod

DuckRyder · 09-13-2003, 06:34 PM

Is the sealing ring on #3 broken at around 2 O'Clock?

Hard to see in the photos what the pistons and rings look like.

Couple of better photos of the cylinder walls and pistons would help.

Any Scoring in the Cylinder or on the Piston?

415pb · 415pb's Garage

Does not appear to be any scoring on the walls at all. #3 cylinder has some kind of black mark (some type of build up) I think. Here some more pics and I will take more tomorrow when I get the pistons off.

Thanks for the help.

DuckRyder · 09-13-2003, 07:11 PM

Here is what jumps out at me:

1) it looks to me like the heads have the seal rings in them and the #3 is blown at about 2 o"clock near the head bolt. (#3 Jug seems to have discoloration in the same area.)

2) again a little hard to see, but either the piston resting on the studs has pushed the # 2 ring way up and is creating an optical illusion, or the ring land is broken away. (The more I look at it the more it looks like an illusion)

3) if those rings were aligned that way while running, the gap in the #2 and the oil ring (the thick one) is way too close together.

DDS · 09-13-2003, 08:38 PM

How's your oil pressure?
IMO, splitting the cases and doing the bottom end is the cheap part, pistons, cylinders and head work is where the bucks are, and you're gonna be putting new wrist pins into old rod bushings...
If ya got the thing this far apart, and you decide to get new Ps and Cs AND the miles are getting up there, pull it right apart, take the crank, rods and case it to a machinist get them to measure and clean everything. Then you clean it again and reassemble it. It is not difficult (I did it, first engine rebuild.)
BTW - Dave D told me (nearly three years ago now) when I began my project that my cam would probably be badly worn. It was toast. I have no regrets at all about doing the complete rebuild.
Best of luck. Dave

DuckRyder · 09-18-2003, 05:20 PM

What did you decide to do?

415pb · 415pb's Garage

Well, glad you asked. I dropped the motor on Saturday and brought the heads, cylinders and pistons to a friend of mine who owns his own shop (The Sports Car garage, Palm Desert, Ca). He disassembled the heads for me and told me that the valve guides are shot.

He showed me that the valves are floating around in the guides. He told me that the pistons, cylinders and valves are all in great shape, but I needed new rings. So I dropped everything off at the machine shop for cleaning and a valve job. The machine shop guy also told me that the cylinders, valves and pistons are all in great shape. So I immediately ordered new valve guides, valve springs and other stuff from Pelican Parts.

My buddy at the garage suggested I should split the case and change the bearings and check the cam and other things. But to be honest with you, the more I look at the case, the more that thought scares the **** out of me. I just dont want to mess the case up. Anyway, I'm still pondering the thought, maybe I will and maybe I wont. Again, I want to thank all of you for your advice. Couldn't have gotten this far without it. Can't wait to put everything back together.

415pb · 415pb's Garage

And one more thing.....while taking off the oil filler, I looked inside and found a black cap just sitting there inside where you pour the oil...it's part number 022 115 486....I did a search through PP and found that it is a plug.......Does anyone know where this goes?

DDS · 09-18-2003, 05:57 PM

One thing about splitting the case - you will need an engine stand. There are actually very few parts in there, but if it spooks you, why don't you get the garage to quote on doing the bottom end for you?

Dave

415pb · 415pb's Garage

Good point Dave...I just wanted to maybe do it myself, but I guess I can always have the garage do it for me. But knowing me, I will probably end up splitting it myself this weekend.

Thanks,
Rod

DuckRyder · 09-18-2003, 06:06 PM

Splitting it isn't a huge deal. (Of course mine is still apart, so who am I to talk) You can pretty much bet it needs a cam, they all do for the most part.

As long as someone previously didn't do something stupid, once you get all the bolts out it the case halves will come apart without too much effort.

Sounds like you are in pretty good hands. If it gets into valve and seat work, have someone who really knows these things do the work. Also, the exhaust valves are sodium filled and have a reputation for dropping. It would be worth considering replacing them with stainless.

DDS · 09-18-2003, 06:51 PM

Go for it.
I made an engine stand bracket, cheap (and flawed, don't copy it without talking to me first). Had the machine shop measure everything, clean the case re and re the rods, polish the crank, balance everything, I bought new cam, lifters, bearings and checked oil clearance and reassembled. followed Jake's video and Tom wilson's book. No problems. You wouldn't want to do all that, but checking/replacing the cam, maybe polishing the crank and and replacing the bearings might be money well spent.