hey honda-tech i just bought an accord with an f26b blue top
guy told me he took it to a shop and 2 pistons read 20 psi at the compression test
but the car dosent smoke ... what do you guys think the problem could be ... ???
i hear a little ticking noise when i accelerate it and at low rpm the like 1000rpm it shuts off

please tell me it's the head and not the block ..

 

You will need to do a more thorough job of checking.
Lack of smoke is not a good indicator either. Better question to ask the PO is what was happening when the engine began to fail. If a head gasket did blow between two cylinders those conjoined cylinders such as 1/2, 2/3, or 3/4 would both have compression faults.
But if you have cylinders 1/3 or 2/4, or 1/4 that are dead the engine may be in worse condition.

 

it could be the head, its possible you could have some bent valves that aren't closing completely (which is why there is low compression but no oil blow by)

 

he told me it happend out of now where ... i kinda dont belive him but the car is completly stock a/c p/w it's not even dropped so i dont think he beat on the car he bought the motor 4 months ago from jdmenginedepot i have the receipt but they only it have a 3 month warranty .. the 2 cylinders in the middle are the onces that have no compression ... he said it happend out of no where ... and that he had put so much money into it that when they told him that he just said forget it ...

idk if it helps but i feel the hoses have to much pressure while running ... you could barely barely squeese them ...

 

btw i checked oil and it's fine theres no sign of antifreeze being mixed together ...

 

sounds like someone might have put the timing belt on wrong have u checked to see if its off by a tooth or two? damage could have been done though....might need new valves- hopefully not new pistons also

 

Do a leakdown test, that'll tell you for sure.

 

i dont have the tools for a leakdown test and not really the money ... i have some money but i want to use that for what ever i have to do for the motor there charging me 100 to do a leakdown test

BTW TODAY I OPEND THE OIL CAP AND SMOKE STARTED PUFFIN OUT AND LOOKS VERY DARK INSIDE THE HEAD ... IM STARTING TO THINK ITS THROWING THE COMPRESSION UP

 

You are going to have to find out what is wrong with the engine before you can spend money on parts to fix it. People's answers here are only going to tell you what it could be. You physically have to check the engine to see what's going on.

20psi is really bad. I wouldn't be driving it to be honest with you. your only going to make things worse.

Possibilities for low compression;
• Piston rings
• Piston ring land (cracked)
• Bent valves
• Valves out of adjustment
• Blown head gasket

 

i did a compression test results came out piston #2 is at 90 psi piston #3 is at 120 i did the wet test and #2 went up to 360 idk why :-/ and #3 went up to 150

 

Hope you didn't pay much.....

 

a leak down tester at harbor frieght is only like $40-$50, well worth the money, chances are its not going to be fixed with anywhere close to $100, sounds like you have some internal issues for sure. prefect oppt. to learn to tear a motor apart. get a leakdown tester and a helms, GL

 

To correctly do the test with a compression gauge.

First you need to have the engine up to operating temperature. Then you need to disable spark and fuel. Have the throttle at WOT, and finally make sure you see the needle jump 3-4 times before you record the psi. Test each cylinder 3 times.

If you did the test correctly then there appears to be trouble in cylinder #2.