Skip the auto shop - Our mechanics make house calls

Q: Motor rebuild. Loss of power when driving. Knock coming from top end.

asked by on

My father had the motor rebuilt in this ranger by a friend/mechanic. The head/valve train was not refreshed however. I believe the timing chain was replaced. When he was driving it home the truck lost power and had to be towed. It sit for a year after that. He gave the truck to me so I started working on it. I had to replace the fuel pump to get it started. The truck started and idled fine. Once it got warm I heard a knock in the top end of the motor. After talking to the mechanic who rebuilt the motor he suggested it was something to do with lash adjusters. He is not capable of fixing the truck at the moment and I can not afford a traditional mechanic. Where should I start on the diagnosis/repair of this issue? Any suggestions or help would be greatly appreciated!

My car has 200000 miles.
My car has a manual transmission.

A: Hey there. The valve tappets are under the ...

Hey there. The valve tappets are under the camshafts, and in order to replace the bad ones, or ones that need clearance adjustments by replacing lash adjuster, you would need to have camshafts removed. This is a major job to only be performed by a qualified mechanic or severe engine damage may happen if not done correctly. Depending on how badly you need to get the car running, your best bet may be to have another mobile mechanic diagnose the vehicle's loss of power in person to advise you on any repairs that need to be made.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car steering locked in intersection

Hello there, this sounds like an rare situation. The whistling sound with the Check Engine Light would have a few possible symptoms. Most likely there would be an exhaust leak or a vacuum leak. Either could also set the Check...

Q: My car's engine heat indicator goes up within 1 to 2 minute after I starts car. What is the reason for engine gets hot too soon?

It sounds like the cooling system is not performing as it should be. This could be due to a low fluid level, a restriction in the system, or a faulty temperature sensor. I would recommend having the coolant level checked...

Q: What do I do when the MAF isn't creating enough ground to the ECM module?

Hi there. First, check the harness connection on the sensor for any burned or corroded pins. That will cause a restriction and make the power drop. If the harness is good on the plug end, then disconnect the harness from...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...