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Just had complete engine rebuild.but it will not rev over 8000 rpm .when it was first rebuilt.it only done about 13 miles and it ceased.when they stripped it down they found the main bearings had ceased.manifacture fault.replaced .they said that the bore and piston were ok.and the powervalve was working ok.they said it could be the air filter.so ive just ordered a ram air filter.could they have tightend the powervalve down to tight.the bike is a rs 125 aprilla 1999.before it was rebuilt it would do over 90 mph.
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www.hotrod.com > Hot Rod > Engine > News They are rarely considered for a rebuild because performance pistons are hard ... 3/14 1 A key problem with 318s is that the pistons are typically well below the ...
www.jalopyjournal.com > ... > Apr 13, 2012 - 30 posts - 18 authors
My van is a 67 a108 van with a 318 in it. ... Yea timing or a cam problem, Check your TDC and make sure you didnt strip something out. ..... old guy was the original owner) that the engine was rebuilt about 15,000 miles ago.
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Jan 15, 2012 Problems with my 318
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In your instance it's really a toss up. Do you trust that the engine was rebuilt properly? Did you check the oil real close, and especially pull the drain plug and check the oil that comes out. If it's got metal flakes or ever worse, shavings, they might have only gotten 20mi. before it ceased up. It could have stuck rings. But a V8 is hard to turn over by hand even when it's not ceased. If you think it was done right and want to break it free, I'd spray WD-40 or better yet this stuff called Blaster 50 that seems like a gimmick but it's sold in most auto parts stores. IMHO it works better than WD-40. Pull the spark plugs, spray a bunch in each cylinder. Then I'd take the air hose off my compressor and spray each hole, then repeat. Yeah, you might get a face full of the stuff, but it's going to force the spray around where you can't get to with just the spray can and force it down in the rings. You should know that more than likely there's going to be damage to the cylinder walls if the rings have rusted themselves to the walls. And the rings will most likely be frozen in the ring lands. This causes all kinds of probs like low compression, smoking, and high oil usage and fouling plugs. Once you sprayed the cyl's good, pull the flywheel cover off and get the proper flywheel wrench(it looks like a bar with a hook on it, it's made to grab the flywheel by grabbing the ring gear teeth) and see if you can break the rings free. Might take a while. And if it never comes free it probably means the reason the engine froze up was because the main and rod bearings either were not installed properly or they didn't get oil. Be prepared to find you need a whole new engine. Good luck.
u need a scan using factory or vehicle specific gear--values of components will be diplayd so an xperiencd tech can decyfr--littl code readers dont du it---w age of car certain sensors etc need replacin-believe that trans is electric controled--dont rplace any parts til uve isolated issue----------also go to magicmechanic online and checout the napa library on that model
Hi, Seems like a possible inlet air leak or to low engine revs, tickover rpm to low.outside chance engine oil to thick, try lower vicousity engine oil. this sometimes works with a rebuilt motor. Could be engine is just still tight from rebuild,1-2000 miles running in should cure this. if still low mileage.
is the car going into Overdrive? have the trans shop check their work over and make sure everything is OK. If the trans checks out ok, have a reliable repair shop check scan data and see if they can see anthing out of spec.
the only other things I can think of mate without looking, is put your hand over the silencer at tickover (when engine cold) and see if the the exhaust is blowing from somewhere. A new gasket should sort that. If you dropped it on the timing cover side it might be worth a look in there to see if there is any damage.
good luck
Dan
Pretty much dosen't matter which engine or manufacturer you are talking about, minimum pressure on a good rebuild should be at least 30psi at idle when completely warmed up.(I'd be happier with 40) If it were a used engine with lots of miles you could get away with 15 or 20, but with everything new, I'd be concerned if lower than 30.
Very likely yes. If it won't turn over at all you will probably need a complete rebuild. If it turns over but won't run I would check the compression before I rebuilt it.
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