Skip the auto shop - Our mechanics make house calls

Q: I have a bad 305 CI engine. I want to replace it with A350 CI engine from a 1997 Tahoe.

asked by on

I want to replace the worn out 305 ci engine in my 1987 pickup with a 1998 350 ci engine. Is this more trouble than I want to deal with?

My car has 150000 miles.
My car has an automatic transmission.

The differences between the two are the years and size of these engines. A lot can change in 11 years and you will definitely have a computer system, fuel pressure problem, and trouble mounting accessories. I would think you would have less problems if you were to completely overhaul the old motor or find a motor that is the same year.

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!
  • Home
  • Questions
  • I have a bad 305 CI engine. I want to replace it with A350 CI engine from a 1997 Tahoe.

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: Getting code P0131 rough idle, loud, and smell exhaust fumes

Hello. Codes P0456 and P0131 can come up from a serious exhaust leak. From what you are explaining, it sounds like this is the issue. The exhaust leak will need to be located and repaired before further testing. If there...

Q: How do you get Check Engine Light reading with no OBD-II plug?

All vehicles that are newer than 1996 and sold in the United States are required to have an OBD-2 system. The scanner plug may have been removed for some reason by the previous owner or mechanic. If this is the...

Q: Will my technician bring a plug in battery charger?

Hi Amelia! It is not guaranteed that all of our mechanics carry this tool with them to every appointment. Therefore, having your battery jumped by the mechanic may make more sense in a situation such as this at the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...