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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine bogs down in First

If the exhaust was blocked by the cats before, then some of the debris from the cats [catalytic converters] could have gotten into the pipe to the muffler, or blocked the muffler. Check to see if you can rev your...

Q: Car stalling out briefly at 70 MPH

Hello. If there is a problem with the variable valve timeing, VTEC, or with the oil pressure, then the vehicle will definitely act this way. The oil leak needs to be found first. It should not be hard since it...

Q: Driving on freeway around 60 mph loud pop then truck died wants to turn over but dont.

answering

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...