Q: My 1988 Chevy G 20 van with a 350 small block overheated the other day I replace the distributor rotor spark plugs PCV valve thr

asked by on

My 1988 Chevy G 20 van with a 350 small block overheated the other day I was able to start and drive a vehicle a few miles that I parked it for work when I left work hours later it wouldn't stay running had a really rough idle high and low I was able to limp it home with very minimal RPMs would never get over 35 miles an hour I've done pressure on my cooling systemthe no leaks I replaced the rotor and distributor cap along with that PCV valve and a throttle position The rough idle has Subsided unlit I put it in gear now I don't know what to do next

My car has 20000 miles.

It sounds like you may have a the beginning of a blown cylinder head gasket. A blown head gasket may cause a number of different symptoms. A head gasket that fails between cylinders will generally cause a misfire and potentially compression leaks from one cylinder into another. Low compression will eventually result in a rough idling engine. When the head gasket fails between a cylinder and the coolant port, coolant may leak into the cylinder causing it to be burnt with the fuel charge in the combustion chamber. This often results in misfires on startup, especially after the engine is run, turned off and restarted and in some cases may result in the engine not maintaining enough cylinder compression to even run or start. This type of failure may not always show with a compression test. I would recommend having an expert from YourMechanic come to your location to properly diagnose the symptoms you describe.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My 1988 Chevy G 20 van with a 350 small block overheated the other day I replace the distributor rotor spark plugs PCV valve thr

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: When I drive mostly slow, but also when I'm going fast the front right tire has a bounce to it. New tire, what could it be?

Hello, thanks for writing in about your Chevrolet Monte Carlo. If the problem did not start until you installed the tires then the tire is most likely bad and has a flat spot. I suggest taking it back to the...

Q: how much should an ignition coil or ignition cost w parts and labor for a 1988 olsmobile 98 regency engine is a 3.8

Hi there: If the quote you were given includes replacing both the ignition coil and module, then a price between $200 and $300 is a pretty fair estimate. If it's one or the other, then a quote closer to $200...

Q: Car makes squeaking noise

Squeaks can drive you crazy. The problem is that any part in the suspension can squeak when the suspension is moved. There are ball joints, tie rods, control arm bushings, sway bar links and bushings, and struts making up the...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...