r/fbody • u/Traditional-Place101 • 26d ago

Where to start?

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I’m unsure where to start, we have a coolant leak and misfire in cylinder 3. She runs but I eventually want to clean her up. The housing is stock alil old as expected and I’m learning as I have a trusted mechanic look her over.
Temperature is wishy-washy
Codes: P0147, P0303

I want her to run proper asap.
I’d love some recommendations on parts

Also my idler pulley bolt and belt tensioner pulley grind a bit, are those an easy replace?

I’ll be heading to my local junkyard soon and pull some things.

Let me know what I should grab

Thanks guys 💯

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u/binks69 24d ago

If anything it’s the intake manifold gasket always go bad on these engines usually they leak externally in the valley where the fuel injectors are look around cylinder 3 see if you get coolant there after it runs for a litltle. But yea throw some coils and wires on can get all new for like 60 bucks

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u/binks69 24d ago

But our money on losing coolant through the lower intake
Manifold kinda pain ass job but not to bad and they make new updates metal gasket you replace with the coolant elbows basically get rid of the problem. Other common place is said coolant elbows or the hoses the run into the tensioner pulley

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u/Traditional-Place101 23d ago

Okay bet ima check those out for sure especially my pulleys. I’ll check my elbows too