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What is the worst thing you have ever done to your car, that you inflicted yourself?

RobSheffield

By RobSheffield,
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TrickTT Rookie

TrickTT

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Did you check that all the valves were free before you installed the cam? Assuming you had them aligned correctly, the first 2 bearing caps you install are on the valves that are open at that point on the cam. If a bucket was stuck it would put a load on the cam and possibly break it, but i wouldn't think a valve spring could apply enough force to break one (unless it was already cracked before install)

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AndyT Newbie

AndyT

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may have had a hairline crack from delivery etc, did you inspect them after arrival?

 

Looking at the pic. I'm thinking that. It would be nigh on impossible to tell on inspection too. :(

Although, if sent back to HKS, they could test it and tell if it did indeed have one.

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uk-rich Newbie

uk-rich

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if sent back to HKS, they could test it and tell if it did indeed have one.

 

 

they will say there is/was nothing wrong with it

 

 

better luck with the next one

 

when i put my cams in, i did'nt follow the toyota manual at all, just follow good engineering practices and you will not go far wrong

 

(however, i'd say that cam shaft was damaged before you had it)

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RobSheffield Newbie

RobSheffield

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Did you check that all the valves were free before you installed the cam? Assuming you had them aligned correctly, the first 2 bearing caps you install are on the valves that are open at that point on the cam. If a bucket was stuck it would put a load on the cam and possibly break it, but i wouldn't think a valve spring could apply enough force to break one (unless it was already cracked before install)

 

Aligned as per the manual, and the manual states to put cap 3 and 7 on, and slowly/incrementally tighten them all down - ie not one on then the other on.

 

iirc on the intake 3 was where the lobes were on the follower, and 7 was clear. The follower buckets dropped just like they did with the exhaust.

 

Eyeball only but the bearing caps looked level. Not twisted or anything. I cant say for sure that they werent stuck somewhere, its not that easy to have your eye on 7 lower bearings and 12 cam lobes at once!

 

I have heard of them breaking in the past, hence i was going so slowly and taking my time.

 

Expensive lesson learnt :(

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jevansio Newbie

jevansio

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Rob, I've had 2 HKS cams fitted to my Supe that have snapped, one by Michel's mechanic & one by Motoscope. I have a feeling people on the board suspected they weren't fitted in the correct manner, but I trust the skill of Michels mechanic & Motoscope without question (they have put together more engines than I've had hot dinners) so be comforted by the fact that it can happen to anyone.

 

BTW worst thing I've done to the car by myself, fitted a £2k stereo then ripped it out in a fit of rage :D

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RobSheffield Newbie

RobSheffield

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Rob, I've had 2 HKS cams fitted to my Supe that have snapped, one by Michel's mechanic & one by Motoscope. I have a feeling people on the board suspected they weren't fitted in the correct manner, but I trust the skill of Michels mechanic & Motoscope without question (they have put together more engines than I've had hot dinners) so be comforted by the fact that it can happen to anyone.

 

BTW worst thing I've done to the car by myself, fitted a £2k stereo then ripped it out in a fit of rage :D

 

Cheers Jay

 

Im pretty sure i did it right, but ill never know for sure

 

Im well annoyed but looking on the bright side :)

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Ian C Newbie

Ian C

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I recall I found two guides to reinstalling a camshaft in the Supra and both of them were Toyota. One is the two-cap method as you describe and the other is cylinder head style - you put the camshaft on the buckets at whatever angle is needed to make it rest in the bearings, then tighten the caps up in the reverse bolt order to when you undid them (I do about four passes on each bolt, tightening them up roughly the same by starting the ratchet in the same place each time and counting the number of turns). Then you put on the cam gear and turn the cam to TDC.

 

I've done about five HKS camshaft installs like that and not had a problem - it's much less load and spread out across the bearing surfaces. It's still probably damage in transit that caused the snap though.

 

I've a 272 intake cam if that's what you snapped :sly:

 

-Ian

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Kranz Newbie

Kranz

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Rob, its a bad day when that kind of things happen. I bet there were some choice words? ;)

 

I'm rebuilding a BMW M44 engine for a colleague and these also have hollow cams. The advice is that they should NEVER be removed or installed without use of a special tool that compresses all the valves in one go. I guess its much like a multiple valve spring compressor.

It may be a long shot, but one of these may fit the Supe engine. Well, 4 of the 6 sets of valves lol. Your local BMW specialist may be able to help?

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Havard Newbie

Havard

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Quick pic

 

Obviously i would never normally place a cam on the ground, but its a bit beyond any dirt ingress now :p

 

Unlucky Rob, it could be worse mate (although nothing seems to spring to mind).....:(

 

I can't believe in this thread of thread of different ways to ruin/damage your Supra, no-one has mentioned fitting a Veilside rear spoiler........:sly:

 

H.

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AndyT Newbie

AndyT

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Unlucky Rob, it could be worse mate (although nothing seems to spring to mind).....:(

 

I can't believe in this thread of thread of different ways to ruin/damage your Supra, no-one has mentioned fitting a Veilside rear spoiler........:sly:

 

H.

 

Oh yeah. You're quick and on form this morning mate. :D

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Jake Newbie

Jake

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Oooo, bad luck Rob :( What a p!sser

What's that going to cost for another?

 

 

 

I've had a few self inflicted car disasters. The worst one....

 

I knocked off for the day mid-way through putting a 1275GT engine into my new resprayed Mini (I was about 18 at the time). I was using my Dad's JCB JS130 (massive yellow JCB thing with caterpillar tracks) as an engine hoist. When we left the new engine was suspended from the JCB's outstretched arm with the engine almost on it's mounts in the engine bay.

When we came in to work the next morning we found out that the JCB had a slight hydraulic leak, which caused the heavy arm of the JCB (several tonnes) to very slowly and gradually lower during the night, pressing the engine down into the mini's engine bay. :blink: It totally mangled the front of the car, the subframe, steering rack, the top end of the engine, etc etc.

We scrapped the car.

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Havard Newbie

Havard

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Oh yeah. You're quick and on form this morning mate. :D

 

Weetabix......;):D

 

 

I've had a few self inflicted car disasters. The worst one....

 

I knocked off for the day mid-way through putting a 1275GT engine into my new resprayed Mini (I was about 18 at the time). I was using my Dad's JCB JS130 (massive yellow JCB thing with caterpillar tracks) as an engine hoist. When we left the new engine was suspended from the JCB's outstretched arm with the engine almost on it's mounts in the engine bay.

When we came in to work the next morning we found out that the JCB had a slight hydraulic leak, which caused the heavy arm of the JCB (several tonnes) to very slowly and gradually lower during the night, pressing the engine down into the mini's engine bay. :blink: It totally mangled the front of the car, the subframe, steering rack, the top end of the engine, etc etc.

We scrapped the car.

 

OMFG........:blink:

 

H.

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