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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 04-26-2009
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Engine Knocking

Ive been meaning to post this up for a little while but Ive just been trying to check a few things to rule a few things out.
Okay, Heres my deal. My 4L in my 92 Ranger is knocking. I have replaced one head (passenger side head) before the knocking started. I have driven it about 3000 miles after replacing the head and then it starts knocking. The Oil level is good (running 10W30) and the engine still runs very strong. I havent noticed a decrease in power at all since the knocking started. I havent tested the compression yet but I might do it sometime this week if you guys think I should try it.
What do you guys think could be knocking?
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Old 04-27-2009
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Anyone have any Ideas????
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Old 04-27-2009
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read somewhere to try higher octane gas

does it only happen when you accelerate?

it also might be valve tap/valve lash
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Old 04-27-2009
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when you say knock i think connecting rods hitting off the crankshaft.
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Old 04-27-2009
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Higher Octane Gas does nothing for it. It follows the RPMS but does it the loudest under a load. I dont think it is a rod because it runs way too good to have a bent rod.
I am thinking it may be a valve tap of some sort but not 100% if it is or not.
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Old 04-27-2009
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We Seafoamed the BII I'm working on and that cleared up about half the tapping. There's a thing on TRS to fix the tap. (If i remember correctly) You'd have to tighten the rockers.
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Old 04-27-2009
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Quote:
Originally Posted by KnightTremors View Post
Higher Octane Gas does nothing for it. It follows the RPMS but does it the loudest under a load. I dont think it is a rod because it runs way too good to have a bent rod.
I am thinking it may be a valve tap of some sort but not 100% if it is or not.
it doesnt have to be a bent rod the bearings could be laying in the oil pan like my s10s motor
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Old 04-27-2009
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Quote:
Originally Posted by elanalvey View Post
We Seafoamed the BII I'm working on and that cleared up about half the tapping. There's a thing on TRS to fix the tap. (If i remember correctly) You'd have to tighten the rockers.
Hmm, Im gonna have to try and seafoam my engine then and see if that helps any. If not I guess I will have to see about tightening the rockers.
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