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4EFTE Head Gasket Failure/Blown Engine Prevention


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4efte isn't really designed to be a performance engine

Ollieh, what you thinking then mate, leave it stock ?

What is the main cause of head gasket failure = excessive boost for components used e.g oem headgasket, oem head bolts . poor tune the list can go on..

bottom end failure = again being unrealistic with the amount of load components can take vs power goals = ticking time bomb. poor tune poor machine work etc etc

vtec rev range hmm i think thats around 10000 rpm i havent seen or heard of a 4e or 5e rev too that and live too tell the tale ! but i have seen them rev too 9000 rpm all day long but that involes alot of R&D and money

Yes mate, I agree. That's why I thought I'd raise the question and plan ahead before I do the work. I don't want to go and start bolting bits on without installing all the stuff to support the mods and internals under high stress. You could say this is my cheap attempt at R&D lol

When it went.. at 133mph.. i thought it was the HG, until i stripped the head off, check no2 piston.

That was a standard OEM gasket with OEM headbolts, the ones from factory. The piston melted before the gasket blew, was still in good nick!

No way mate, so the metal expanded before collapsing under all that heat allowing all that water to seep through... it wasn't really a head gasket failure then, more like a piston failure lol I suppose an OE gasket is okay for the task then..

i presume you was running alot of ing timing ?

Ya stock head is a no no on the limiter and small turbo 1s work is done no problem but still happens not as often I've a full acis ported 5efhe heads and sometimes still blows at 7500/8000 and always between 1 and 2 cilinder again common spot right there seems the heads are the course maybe design flaw I don't know

sometimes blows at 7500/8000 ? what data do you have too say this ?

does the turbo your using still make power at this rev band ? dyno graph ? for the need too rev this high ?

i presume youve changed your head gasket more than a few times? how many times have you decked the block ?

okay guys, so you mentioned a stock head is a no no on the rev limiter. Are you suggesting porting the head? Change the cams? Uprated Valve Springs?

This seems like a bit of a sensitive area, maybe I should just leave it stock lol. Or settle for a soft upgrade to about 160-170bhp lol

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Head gaskets and bottoms ends are string. The issue is as mentioned. Poor maintenance, bad set or badly tuned.

Unopened 4efte will take 220 bhp no problem as long as the engine is healthy, looks after and mapped

Also no idea what colin is on about.

Nothing wrong with the standard head. I'm pushing over 300 for good few years. Never had a issue with a head.

Edited by Foggy
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sometimes blows at 7500/8000 ? what data do you have too say this ?

does the turbo your using still make power at this rev band ? dyno graph ? for the need too rev this high ?

i presume youve changed your head gasket more than a few times? how many times have you decked the block ?

. Follow the journey of missstress I don't run stock chocking intake neither I've ran alsorts of turbo's. ,am I the only 1 that sees this issue ? Foggy your on a fully machined forged block in on about the stockers only Edited by 5e colin
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Ya but your on about the head not the block. My head is standard. Inlet manifold is standard.

I've ran verious setups and still do.

Never had a head gasket or bottom end issue.

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. Follow the journey of missstress I don't run stock chocking intake neither I've ran alsorts of turbo's. ,am I the only 1 that sees this issue ? Foggy your on a fully machined forged block in on about the stockers only

Edited by Shyam
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When it went.. at 133mph.. i thought it was the HG, until i stripped the head off, check no2 piston.

That was a standard OEM gasket with OEM headbolts, the ones from factory. The piston melted before the gasket blew, was still in good nick!

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It happened because i was being a tit :D

Youre onto the right lines there buddy, those mods will see you at the power you want.

I would say though buy a spare engine and build it up in anticipation.

This was another one i done haha.

20160813_072128_zpsgenu2ljh.jpg

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Ya but your on about the head not the block. My head is standard. Inlet manifold is standard.

I've ran verious setups and still do.

Never had a head gasket or bottom end issue.

i agree..the stock head gasket can take quite a beating once your car is properly built and tuned.

i actually prefer it to many of the popular/branded MLS ones out there

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It happened because i was being a tit :D

Youre onto the right lines there buddy, those mods will see you at the power you want.

I would say though buy a spare engine and build it up in anticipation.

This was another one i done haha.

20160813_072128_zpsgenu2ljh.jpg

thanks pal....Yeah it will see me to the power I'm after but is there anything else I can install to maintain reliability/engine failure? I'm thinking I should also add a oil catch can with baffles etc to the list...

haha looks a bit like a vagina. Only time I blew a piston through a cylinder head was in my mk2 fiesta when it had a pitiful 1.0 lawnmower engine. Ran that motor into the ground for an excuse to put a bigger motor in and even after the camshaft snapped in half, it still ran strongly for a whole month until eventually piston blew through the head. I still got a chunk of the cylinder head with a bit of the serial number on it which I use as a keyring. Proper sentimental stuff lol

MSL gasket on my gt after a few weeks of use

Jeez, I think I'll be sticking to OEM gaskets then if I ever need to replace it...

Edited by Shyam
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