Who Says 7M is Not Reliable????

[csnow]

I have a 7MGTE with 216,000 on the clock. Motor had a MHG put on it earlier in it's life w/arps. Motor uses no water and never overheats in the brutal summers of Florida. I wanted to see how much life was in her before throwing some mods on, so a buddy and I did a compression test tonight. All cylinders were 172 - 175 with the exception of #1 which came in at 168. This was also on a cold motor so the rings had not expanded, which should yield a higher reading when warmed up. I am very pleased :love: I am going to go ahead and put my new turbo on and crank it up. Don't worry, I have money set aside for a rebuild, but I am betting she will hold together with no problems in the 400-450 range. Only time will tell :biglaugh: Just shows that with proper maintance and TLC, these motors can go the distance.

 

[Mr.PFloyd]

keep oil in her... don't be fooli sh liek most mk3 owners... i know my preivous owner was... JZ for life haha

 

[Nick M]

Somebody did something to it. That is too high of cylinder pressure for that engine.

Yes, the 7M is a great motor.

 

[Stretch]

My old 92 had 314,000km on the clock with the original internals and headgasket/headbolts NEVER re-torqued by anyone. Never blew the gasket in the least, car kept on going. I pushed it until the automatic tranny was dying but the engine still went, it was tired for sure, but still went. bTW it was turbo aswell. 7M; American-type power, Japanese strict engineering.
eric

 

[Allan_MA70]

might be a NA bottom end / pistons

 

[tte]

If the head is shaven and a not thick enough headgasket was used, that would raise the compression too.

Cheers,
Roy

 

[csnow]

might be a NA bottom end / pistons

Nope, owner that had it before me has had it since 1990 (car is an 89) Miles are mostly highway.

 

[Mk3 TurboS]

Look real close it should say 1jz on it somewhere. LOL Nah go the 7m.

 

[csnow]

I did talk to the guy I bought it from (former coworker) and he did say that when the head gasket went, the did put new OEM bearings in it. The head was resurfaced with the appropriate size MHG and was done by a 7M guy in the Raleigh, NC area. Rings and pistons have never come out of the block. I know it will let go one day especially with the Greddy T67 kit pushing it harder, but the point I was making is that these motors are stout and reliable with proper routine maint.

 

[bobtsgt]

My buddy has 26X,XXX on his 88 auto turbo. All stock. They can run as long as you treat them good. He's still pushin 7psi.

 

[figgie]

i had close to 210,000 on the clock when my engine died.

Bt it died because of me and a stupid ice patch

High compression

actually for 216,000 miles. those number are about right. Reason, carbon deposit on the piston. Increases compression.

 

[csnow]

Figgie, PM sent

 

[figgie]

I replied

but in short

if you have thehead off the car
a bottle of chevron techron and let it sit. It will take that carbon away without issues.

If the car is still running

You have to options. ATF Fluid (prefereably Dexron III) or water through the intake prior to the throttle body. Smoke show but leaves the pistons clean as a whistle.

 

[bwest]

also seafoam. run it through a vacumn line in the intake manifold, let it sit for 5 min, fire it up and you'll kill all misquito's in a 10mi radious. oh, it'll clean your c.c. too....