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Norman Gomo Posted on Jul 31, 2015
Answered by a Fixya Expert

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What causes overheating after engine overhaul, having fitted new pistons,rings and sleeves including cylinder head gascket ?

1 Answer

cwradio73

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  • Master 1,162 Answers
  • Posted on Jul 31, 2015
cwradio73
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Could be a number of things, did you put in wrong or bad thermostat, or radiator clogged, or not pulling air through radiator? A host of thing could be the problem, did you break it in correctly, an using right oil or enough oil? Need more info

5 Related Answers

caroldon

Donald DCruz

  • 17130 Answers
  • Posted on Sep 30, 2010

SOURCE: When fitting new rear brake

Applying pressure will make the piston go back in but you can kick and release the brake before the job is done , use a wire band to run over the piston to hold it tight so that it does not move off, the pads can be pushed into with the wire holding the piston till in place when it can be taken off.

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Anonymous

  • 454 Answers
  • Posted on Jan 13, 2011

SOURCE: My 1997 Mazda Millenia 2.3L

Hello, dmaplang and thank you for asking your question on Fixya!

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your
1997 Mazda Millenia, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating
1997 Mazda Millenia

Get more great money saving tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

sj196653

Shade Tree All Repair

  • 509 Answers
  • Posted on Apr 28, 2012

SOURCE: leaking oil into the cylinder

This could be valve seals on these 2 valves. Or this could be bad alignment of the rings groves when they were installed. Have you done a compression test this is where i would start.And if you suffer low compression the compression rings could be broken or aligned improperly. If you need further help just ask me.Remember to rate my solution

sj196653

Shade Tree All Repair

  • 509 Answers
  • Posted on Apr 28, 2012

SOURCE: oli leaking into the piston chambers

I would start with a compression test then move to your valve seals. This sounds like a improper alignment of the ring grove could be your culprit or put in upside down even. Remember to rate my solution

Chris Burge

  • 315 Answers
  • Posted on Nov 10, 2013

SOURCE: car still won't start

Are the plug wires going to the right cylinder? Sounds like something obvious, but double check everything.

If you need further help, reach me via phone at https://www.6ya.com/expert/chris_b82b45c59bcf133d

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0helpful
2answers

Nissan td 27 have a heavy blow by after overhauling the engine, what could be the problem. Sent all necessary parts to an engineer for servicing.

You describe the situation as a heavy blowby. In the usually accepted meaning of the term blowby relating to an engine, means piston blowby and is recognised by a large amount of whitish vapour being expelled through the crankcase breather, dipstick tube and the oil filler cap if removed. This usually indicates the excessive wear of cylinder bores, pistons and piston rings that are no longer capable of sealing and allow combustion gas to blowby.

If the vapour puffs in sympathy with the engine speed it suggests stuck or broken piston rings confined to a single cylinder or a damaged piston.

It is difficult to understand how this would happen with a newly overhauled engine that surely must have been rebored and had new pistons fitted in order to qualify as overhauled. I can possibly advise you further if you post details of the overhaul in the comments section.

Not unrelated but perhaps surplus information just now - new cast iron piston rings take 500 miles to bed in to new properly honed bores while steel rings take 1000 miles. It is important to complete those miles with the engine filled with a base or low grade engine oil or proper running-in oil. Filling a newly overhauled engine with a modern high-spec oil can mean the piston rings will never bed in and forever afterwards the engine ios likely to smoke and consume a lot of oil.
0helpful
2answers

Water in the oil

Radiator coolant in the engine oil is normally an indication of a failed cylinder head gasket or a crack in the cylinder head or both.

Running the engine in an overheated condition will cause head gasket failure and often a crack in the cylinder head.

The problem you have is coolant is escaping into the engine's lubrication passages via the failed head gasket or head crack and contaminating the engine oil. If not fixed you will cause further damage to the engine as oil contaminated with radiator coolant cannot adequately lubricate the engine.

Running a leak down test on each cylinder will confirm the leak. In this case you are going to need to have the cylinder head removed and thoroughly checked for cracks and any warpage as well as a new cylinder head gasket fitted. The condition the engine block surface will also need to be checked.
0helpful
2answers

Engine oil coming up thru #4 spark plug hole

you have a bad head gasket or a crack in the block or a bad valve seal
1helpful
1answer

I have a mitsubishi 4D56 Engine ( Hyundai ) - which blew a head gasket. We removed and recon'd head and re fitted. We fitted new rings. The engine is now pushing oil out the breather. What is causing this?

If you put new piston rings in the engine without doing anything to the cylinders themselves, you most likely have a sealing problem between the rings and the cylinder walls. This will cause blowby and pressurize the crankcase causing the problem. Also check for a clogged PCV valve.
0helpful
1answer

HOW TO REPLACE THE PISTON INTO THE CYLINDER SLEEVE

the pistons can be installed from the bottom of the cylinder where there should be a chamfer ( use a ring compressor here makes the job easier--on the bench)
once you have the piston in the cylinder then install the assembly into the block taking care to ensure that the piston is at the top of the cylinder so that the big end doesn't damage the crank journal as you slide the cylinder down into the block I take it that the engine is a diesel ( wet sleeves) so check the liner to block face height before fitting because if the cylinder lip is too low , it will blow head gaskets
make sure that the piston is orientated correctly , the same as the others
0helpful
1answer

Engine rebuild

Bummer. Usually you need to drop the oil pan, pull the rod and piston out, replace the sleeve, and use a ring comprssor to get the piston back into the cylinder and then put it all back together EXACTLY how it came apart including position on the sleeves, rods and bearings. I have not done this on a VW but I do not see this being much different than any other car that I have worked on. No matter what it will be a huge pain in the ***.
0helpful
1answer

I'm fixing my engine with new rings but rings have not fitted and yet the block has not expanded, the spare parts show the same engine no. what can i do. I'm so desperate?

your replacing the piston rings? are you using a spring compressor? when you compress the rings and set the piston down in there sleeves make sure to oil the cylinders the with the rings compressed and staggered gently tap the top of the piston with the wooden handle of a hammer. when i say stagger i mean the gaps in each ring are in a different position so as not to create a bypass of pressure or oil. if you use the compressor the piston should slide into the sleeve of the cylinder
0helpful
2answers

1992 galant 2.0L, car runs for approx. 30-45mins. then stalls out, and runs on one or two cylinders. We recently changed distributor cap and rotor, and ignition coil. no luck yet! battery is nice and clean...

sounds to me that the rings on the piston are worn out with the engine warmed up the cylinder expands a little causing blow by take the oil cap off and see if there is excessive blow by
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