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> 1.7 Rebuild First Start Up Advice, 1.7 Start Up on stand
Robroe
post Jul 4 2024, 05:15 PM
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Have 73 1.7 bought in pieces. Engine has been rebuilt and ‘souped up’ however I don’t know what internals were installed. New crank, cam, pistons, rods and heads. but I don’t know which ones. Weber 44 idf carbs. Never had oil in it and been stored unstarted for 10 yrs in climate control. I’ve added oil by slow dripping 2 quarts through the oil pressure sensor hole. Oil dripped out of the rockers so I’m pretty sure it got some oil as pre lube. It’s on a home built test stand with the transmission mounted with the starter.

I’m trying to turn the engine over by hand with the plugs out. Have squirted oil in each plug hole. I’m able to turn the engine by hand about 45 degrees and it gets harder to spin so can’t go any further. Would it be a good idea to pull the rocker arms to see if the builder installed some wild cam without checking valve/piston clearance? It doesn’t feel like internals are hitting each other but who knows? Would hate to pull the heads if I don’t have to. Any thoughts before I break something?

Rob Roe
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Robroe   1.7 Rebuild First Start Up Advice   Jul 4 2024, 05:15 PM
Montreal914   Cheap Amazon emdoscope connected to you phone shou...   Jul 4 2024, 05:23 PM
Superhawk996   With what you just described, I can’t see any sc...   Jul 4 2024, 05:27 PM
bkrantz   With what you just described, I can’t see any s...   Jul 4 2024, 08:29 PM
emerygt350   When you say 'by hand', what do you mean? ...   Jul 4 2024, 06:00 PM
930cabman   Have 73 1.7 bought in pieces. Engine has been reb...   Jul 4 2024, 08:18 PM
Superhawk996   . . . Or try the starter to spin it over. If you...   Jul 4 2024, 09:38 PM
Superhawk996   Without spark plugs the crank should rotate freel...   Jul 4 2024, 09:55 PM
Superhawk996   If you are unable to get a full rotation of the...   Jul 4 2024, 09:52 PM
emerygt350   You could remove the rockers and give it a go, if ...   Jul 5 2024, 05:01 AM
Robroe   You could remove the rockers and give it a go, if...   Jul 6 2024, 12:02 AM
emerygt350   I wouldn't worry about oil pressure yet but it...   Jul 6 2024, 05:10 AM
emerygt350   And it just occurred to me... Check top dead cent...   Jul 6 2024, 06:15 AM
technicalninja   With what you just described, I can’t see any s...   Jul 6 2024, 07:15 AM
Robroe   With what you just described, I can’t see any ...   Jul 7 2024, 12:19 AM
930cabman   [quote name='technicalninja' post='3154991' date=...   Jul 7 2024, 08:20 AM
Robroe   [quote name='technicalninja' post='3154991' date...   Jul 7 2024, 03:47 PM
930cabman   [quote name='930cabman' post='3155187' date='Jul ...   Jul 7 2024, 03:54 PM
Robroe   [quote name='930cabman' post='3155187' date='Jul...   Jul 7 2024, 05:20 PM
930cabman   [quote name='930cabman' post='3155272' date='Jul ...   Jul 7 2024, 05:46 PM
emerygt350   Hopefully it was just crazy compression and stiff ...   Jul 7 2024, 05:26 PM
Robroe   Hopefully it was just crazy compression and stiff...   Jul 8 2024, 02:40 PM
930cabman   Hopefully it was just crazy compression and stif...   Jul 8 2024, 03:27 PM
emerygt350   Wow, if that is right it is a monster. If you hav...   Jul 8 2024, 02:59 PM
Robroe   Just remeasured stroke using plastic straw. 3.8â€...   Jul 8 2024, 03:44 PM
Robroe   Boroscope just showed up. Pistons are marked 95.95...   Jul 8 2024, 04:16 PM
emerygt350   They look like my 96mm pistons. If that thing is ...   Jul 8 2024, 04:19 PM
Superhawk996   With respect to stroke - you’re neglecting that ...   Jul 8 2024, 06:01 PM
emerygt350   As long as the tip of the probe isn't sliding ...   Jul 8 2024, 07:23 PM
Robroe   As long as the tip of the probe isn't sliding...   Jul 8 2024, 08:55 PM
Superhawk996   Dude not even close to perpendicular to the dome o...   Jul 8 2024, 08:47 PM
Superhawk996   And this DVD available from LNengineering.com   Jul 8 2024, 09:56 PM
Robroe   And this DVD available from LNengineering.com ...   Jul 9 2024, 11:20 AM
Superhawk996   You need to know the stroke, then you can determin...   Jul 8 2024, 10:05 PM
930cabman   There are literally dozens of things that should b...   Jul 9 2024, 04:49 AM
emerygt350   Or you could continue to determine if in fact you ...   Jul 9 2024, 04:58 AM
technicalninja   I DON"T like the raised 95.95. I want the to...   Jul 9 2024, 07:09 AM
Robroe   I DON"T like the raised 95.95. I want the t...   Jul 9 2024, 03:57 PM
Robroe   [quote name='technicalninja' post='3155553' date=...   Jul 9 2024, 04:00 PM
Robroe   [quote name='Robroe' post='3155626' date='Jul 9 2...   Jul 9 2024, 04:01 PM
Robroe   [quote name='Robroe' post='3155628' date='Jul 9 2...   Jul 9 2024, 04:03 PM
technicalninja   Tear down tip! Keep everything in its origina...   Jul 9 2024, 07:24 AM
Jack Standz   U can tell it's a stroker if you can see space...   Jul 9 2024, 09:48 AM
Robroe   If I’m going to tear this engine down to inspect...   Jul 9 2024, 11:35 AM
930cabman   If I’m going to tear this engine down to inspec...   Jul 9 2024, 01:09 PM
technicalninja   THAT LOOKS PROMISING! You might have hit a ho...   Jul 9 2024, 04:29 PM
Superhawk996   For OP RAT = Raby Aircooled Technology HAM = Ho...   Jul 9 2024, 05:09 PM
930cabman   For OP RAT = Raby Aircooled Technology HAM = H...   Jul 10 2024, 07:15 AM
Robroe   For OP RAT = Raby Aircooled Technology HAM = ...   Jul 10 2024, 06:00 PM
technicalninja   You couldn't have any better markings than tha...   Jul 9 2024, 06:28 PM
technicalninja   Pull the tins FIRST!!!! You want ...   Jul 9 2024, 06:33 PM
Superhawk996   Pull the tins FIRST!!!! You want...   Jul 9 2024, 07:00 PM
technicalninja   @SuperHawk996 :first: Those are NICE! Loo...   Jul 9 2024, 07:53 PM
Jack Standz   That is some very good news for you. Those heads ...   Jul 9 2024, 11:43 PM
emerygt350   Man, I would hate to tear that down if it was prof...   Jul 10 2024, 06:49 AM
Superhawk996   Man, I would hate to tear that down if it was pro...   Jul 10 2024, 06:55 AM
emerygt350   First of all, looks like 2.0 heads to me. Cylinde...   Jul 10 2024, 06:56 PM
Robroe   First of all, looks like 2.0 heads to me. Cylind...   Jul 10 2024, 07:15 PM
Robroe   First of all, looks like 2.0 heads to me. Cylin...   Jul 10 2024, 07:17 PM
Superhawk996   What is a legion spacer? looks like multiple sp...   Jul 10 2024, 07:24 PM
Superhawk996   I know all the old fuddy duddies are going to ti...   Jul 10 2024, 07:19 PM
technicalninja   Positives: Heads- look like Raby heads with weldin...   Jul 10 2024, 07:26 PM
burton73   Positives: Heads- look like Raby heads with weldi...   Jul 11 2024, 10:29 PM
emerygt350   I think the raised numbers are just an optical ill...   Jul 11 2024, 05:53 AM
technicalninja   95.95mm in a 96mm bore equals .05mm PTW clearance ...   Jul 11 2024, 07:26 AM
Superhawk996   95.95mm in a 96mm bore equals .05mm PTW clearance...   Jul 11 2024, 08:10 AM
Robroe   95.95mm in a 96mm bore equals .05mm PTW clearance...   Jul 11 2024, 11:33 AM
Jack Standz   I guess I’ll wear the old fuddy duddie title w...   Jul 11 2024, 08:48 AM
technicalninja   [quote name='technicalninja' post='3155978' date=...   Jul 11 2024, 11:25 AM
technicalninja   Piston to wall Bore clearance. You measure the bo...   Jul 11 2024, 11:48 AM
930cabman   Piston to wall Bore clearance. You measure the b...   Jul 11 2024, 12:14 PM
Robroe   Piston to wall Bore clearance. You measure the ...   Jul 11 2024, 06:49 PM
Robroe   [quote name='930cabman' post='3156016' date='Jul ...   Jul 11 2024, 07:00 PM
technicalninja   Those have had the chambers worked far more than S...   Jul 11 2024, 07:22 PM
Superhawk996   Those have had the chambers worked far more than ...   Jul 11 2024, 07:35 PM
Superhawk996   So lighter than OEM con rods. Looking good. Pi...   Jul 11 2024, 07:27 PM
technicalninja   Did you check the stroke during disassembly? You ...   Jul 11 2024, 07:28 PM
technicalninja   The cast pistons, which I agree are FINE, need cle...   Jul 11 2024, 07:32 PM
technicalninja   Those have had the chambers worked far more than...   Jul 11 2024, 07:46 PM
Superhawk996   I'm actually in agreement with you. I did s...   Jul 11 2024, 07:51 PM
technicalninja   SuperHawk, how would you test to see if the valves...   Jul 11 2024, 07:55 PM
Superhawk996   SuperHawk, how would you test to see if the valve...   Jul 11 2024, 08:06 PM
Superhawk996   I’m going to reiterate what Ninja said earlier ...   Jul 11 2024, 07:59 PM
Front yard mechanic   We should change the name of this forum from 914 w...   Jul 11 2024, 08:12 PM
Superhawk996   We should change the name of this forum from 914 ...   Jul 11 2024, 08:21 PM
930cabman   We should change the name of this forum from 914 ...   Jul 12 2024, 06:25 PM
technicalninja   I’m going to reiterate what Ninja said earlier ...   Jul 11 2024, 08:15 PM
technicalninja   We should change the name of this forum from 914 ...   Jul 11 2024, 09:03 PM
Jack Standz   +1 on the suggestions to dynamically balance the m...   Jul 11 2024, 11:59 PM
Robroe   Here are measurements so far. I still need cam li...   Jul 12 2024, 04:51 PM
technicalninja   Good looking numbers! I'd pick a single s...   Jul 12 2024, 05:08 PM
Robroe   Good looking numbers! I'd pick a single ...   Jul 12 2024, 06:25 PM
Superhawk996   I need an engine stand yoke for my build. My wel...   Jul 12 2024, 08:23 PM
technicalninja   I bought a cheap ass one as I was NOT planning on ...   Jul 12 2024, 08:45 PM
technicalninja   https://aapistons.com/products/bench-mount-...AiAB...   Jul 12 2024, 08:48 PM
technicalninja   On balancing... Pistons/rods I will balance to +/...   Jul 13 2024, 10:26 AM
Robroe   On balancing... Pistons/rods I will balance to +...   Jul 13 2024, 02:11 PM
930cabman   [quote name='technicalninja' post='3156410' date=...   Jul 13 2024, 05:51 PM
technicalninja   Thanks for the pics! Those ridges in the port...   Jul 13 2024, 02:29 PM
emerygt350   It looks like a ton of work for a little old 4, te...   Jul 14 2024, 04:46 AM
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