Engine exploration...., Is this engine any good? |
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Engine exploration...., Is this engine any good? |
bostonmeche |
Jul 31 2004, 03:27 PM
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#1
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1974 914-4 (some day a Suby conversion) Group: Members Posts: 39 Joined: 30-December 02 From: Easton, MA Member No.: 44 Region Association: North East States |
Hi all,
Well after pulling the engine several weeks ago and asking retarded questions about push rod tubes, and oil geysers, I done n pulled the cylinder head off of #3 and #4. Having done this I was finally able to learn some things. 1. My cylinders are 96mm in dia and 76mm stroke, (I get 2.2L) Yeah! (IMG:style_emoticons/default/driving.gif) 2. My engine doesn't look like the prestine engines I see on all the Discovery Channel TV shows like Rides and Overhaulin. (IMG:style_emoticons/default/sad.gif) So my questions to those who know. 1) Is it normal to have all this black cryosote (sp?) looking stuff all over the pistons and valves? 2) Should I just put this thing back together and quietly walk away and call the engine toast? or should I clean all the crude off and try and put it back together? 3) My compression numbers are: Cyl #1 100 Cyl #2 85 Cyl #3 100 Cyl #4 75 4) Is this engine worth fix'n?? Attached thumbnail(s) |
ArtechnikA |
Aug 2 2004, 10:28 AM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(bostonmeche @ Aug 2 2004, 08:03 AM) How much does a head job with a valve regrind cost? As I start asking around I want to know when I'm getting screwed. Also, if I re-ring the pistons, do I still have to split the case? if you have inspected the heads and found no cracks, call RIMCO and ask for a quote on a basic valve job. tell them your valve sizes but presume they'll be okay with just a freshening and will not require replacement. i'd replace the springs on principle but if they meet spec you might be able to slide on that. you don't need to split the case, but you WILL need a 'take-apart' ring compressor. there are a few styles, i donno what's the flavor of the day for 96mm. if you are removing the pistons, it's my recommendation that you remove and recondition the rods, and replace the rod bearings. rod bearings have a hard life in our engines and this, too, can be done without splitting the case. lots of people don't do this, so it's clearly optional, but it's pretty normal in 911-land for people to cheap out on top-end work, doing a valve job and re-ring, only to lose a rod big-end bearing a few thousand miles later. your call. |
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