Question about Chevrolet Chevy

1 Answer

350 Chev Engine Irregular Bore Wear

Hi I had my 350 Chev engine rebuilt last year and it has only done about 3000km and was going through heaps of oil and fouling plugs, we decided to pull it down to check it out. We found that there were no hone marks left on the thrust and non thrust sides of the pistons as though the bore had been polished, all bores were the same. I have been told that leaving honing paste in after the rebuild would do this. The engine rebuilder told me it was caused by not having a cover under the PCV valve on the rocker cover.

Would appreciate any input you may have.

Posted by on

  • sbautos2 Oct 09, 2008

    Thanks storm will try get some more info for you.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 426 Answers

What sort of rings were used.you could cut open the oil filter and see whats in there what condition were the bottom end bearings in.running too hot?what sort of pistons,forged or cast?how was it run in

Posted on Oct 09, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Small block chevy id v0313frs


Are you sure you have the correct engine model number? What is the year and the make of the car? That makes a big difference as the 305 is a later model engine.

Sep 01, 2016 | Chevrolet Chevy Cars & Trucks

1 Answer

Loosing oil no leaks no oil under car or oil on motor on 2008 Chevy impala


The only two possibilities are it's leaking into your cooling system due to a blown head gasket, or you are burning it due to engine wear such as worn valve guides or piston ring/bore wear. Have a compression check done. (By the way it's losing not loosing)

Jun 21, 2014 | Cars & Trucks

1 Answer

Loosing oil no leaks no oil splatter on motor


Either it's leaking into your cooling system due to a blown head gasket, or you are burning it (oil) due to engine wear such as worn valve guides or piston ring/bore wear. Have a compression check done. (By the way it's losing not loosing) Is the exhaust very blue in colour? that indicates burning oil

Jun 21, 2014 | Cars & Trucks

2 Answers

Oil consumption


Wow.. 1967 ... 427.. I would start by checking the dist cap and spark plug wires and coil. .. this is such a valuable car you want to go first class on parts.. Performance cap rotor, plug wires like accell or better.. Bascially give it a good tune up..it is a carb car check the level of the flotes in the carbs. excess gas could be fouling the plugs.. Valve seals is a good place to look for oil comsumption.. If it is the Valve stem seals.. it will smoke when you first start it after sitting overnight or over day/.. during the night oil runs down the valve stem and collects on the top of the piston.. Last one these i rebuilt the machine shop installed the wrong cam bearings and the oil did not make up to the valve train.. had to pull motor and dissemble and replace the cam bearings with the correct ones.. seems like sometime during the year Chev, changed the location of the oil feed holes for the cam.

May 25, 2014 | 1968 Chevrolet Corvette 427

3 Answers

Lose vales on a98 votec 350 chev.


Determining what caused sudden slack in valves would be of concern to me, as in perhaps, changed oil brand, grade or filter incorrect?
Most small block chevy's have adjustable rocker arms. Is that not the case with yours?

Dec 05, 2012 | Cars & Trucks

1 Answer

My engine burns oil which should be the best way to fix it


the best way to fix it is to pull it out and exchange it for a rebuilt engine. oil consumption is a sign of wear, and it is 15 years old so it has some wear on it,

Sep 20, 2011 | 1996 Saturn SL

1 Answer

Engine smoke


there are a lot of posability's mineral oils form carbon buildup in the rings over time as engine cilinder wear changing to detergent oil after years of mineral oil can flush out carbon causing engin to burn oil, or excessive ideling glazes the bore which causes oil consumsiom, both require cylinder hone and new rings, a hole in air cleaner will dust engine and score cylinder and wear main and big end bearings full rebuild required,but it can be simply a valve seal and oil leaks down engin valve or a blocked air cleaner causing the engine to **** air threw the polution nose sucking air and oil from sump

Aug 07, 2011 | 2005 Jaguar X-Type

2 Answers

My mitsubishi canter 4d32 engine had all its 4 top compression rings broken ie one from each bore what can possibly cause that and what amount of smoke or mist should i expect from the breather after...


As an engine wears the ring lands on the pistons wear also. In addition to ring land wearing on the piston, the bore in the cylinder develops a wear pattern. Has the engine been rebuilt?
If the pistons have worn ring lands and were re-used it may allow the rings (new or old) to twist in the grooves and catch on any ridge in the cylinder, thus breaking them.

When the engine is apart you must check for proper ring land wear. You need to consult the piston manufacturer for proper wear specs, typically around 0.006in.

If you're getting a visible amount of smoke/oil from the breather after the rebuild something is not right. The rings are not seating. I would definitely recommend boring/honing the cylinders and going with a new set of pistons/rings so you don't have to pull it apart again. A little more now can save a lot in the long-run.

May 06, 2011 | Mitsubishi Pickup Cars & Trucks

1 Answer

Have a 92' GMC, XC, K1500, 4X4, 5.7 350 engine with transmission fluid leaking from the torque converter cover. (Has a 4L60/700R4) I thought it might only be needing a new conv or possibly a new front pump...


Unfortunately, you hit the nail on the head, i assume being a 1992 model, that the transmission has not been overhauled or rebuilt in it's almost 20 years of service. If it hasn't you have done very well.
It is normal wear and tear in your case, not being overworked, but just by doing its job. In an automatic transmission there is clutches, not one (like a manual) but several, and they are immersed in the oil (they are called wet clutches, for this reason), now because they are in the oil, they tend to last longer, but as they wear (similar friction material as in a dry clutch) the dust and small particles are absorbed by the oil and it degrades the oil as well. Thats why I always recommend and a firm believer in regular servicing, but if this is the first time you have had a rebuild especially in a 4 x 4, then continue what you have been doing.

Please vote if you liked this response.

Jun 18, 2010 | 1992 GMC Sierra K1500

1 Answer

82 700r4


ok,

so, you had built you pickups from some service center or branded.

there is a problem related to unbalenced flywheel management in engine when it was assembled that time some dust or any other particles jamed on bore.

so you have to now reopen you engine case & clean up your all part bore,pistons,crank case,perticularly flywheel attach to crank,

do with care,

takes time to get result but you will surely sceeded to fix this.

THNX

May 17, 2008 | 1984 GMC Suburban

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

96 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

61292 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...