Probably not, unless you have the wrong (too long reach) plugs installed. The pistons hitting the valves is usually because the timing chain or belt has broken or jumped position.
SOURCE: idles rough ,spark plugs burnt
if the piston truely hits the valve then your car definitely need overhauling! rod bearing could have worn out. get it towed to a repair center.
SOURCE: 1991 volvo & all 4 spark plugs are
they are too long for that head they may fit i use to see them hit in old dodge 318 wide blocks when purchasing different brand plugs measure the ends from oem equipment
SOURCE: Timing?
As rapportblog7 said the timing belt can jump even if it is newly fitted, happens rarely but it does.What do you mean to pull the code?
SOURCE: engine wont turn over . timeing belt jumped time
well ouch!!! okay is the car worth fixing ? If the belt failed and jumped time there is more damage than just #4. what happened to the plug is the piston hit a opened valve (EXHAUST) and broke it then the valve fell into cylinder while taking in intake and upon coming up on compression that piece from the valve breaking got smashed into the head causing plug damage as well as piston and head damage, i will bet that one other cylinder has a bent valve also, it just bent though not broke but still its damaged. The best solution is to search for a used engine, $ 400.00 - $700.00 dollars. and i hope you have the skills to do the work yourself to save a few more hundred. Dont buy on desperation, check it out, hopefully you can hear it run before purchase,and that it has a exhaust on it so the noisy exhaust don't hide possible other engine noises. And make sure you get at least a thirty day warranty in writing from the seller. if private seller get address,phone #,driver lic#, exact wording on what warranty covers, price paid, and refund amount if motor fails, oil pump pressure !! KNOCKS,cracked heads. do your homework, times are tuff to give $$$$$$$ for another piece of problems or junk!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The video is from a very similar engine72 views
Usually answered in minutes!
not for sure.! Mostly NO.
why ask this?
on DOHC engine, do a cylinder leak down test now. do not crank it and make it worse.
if in fact it is interference engine
none stated.
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