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Author Topic: '72 Fulvia rebuild  (Read 8168 times)
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Keithver
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Posts: 53



« Reply #75 on: 08 September, 2021, 07:52:54 AM »

Thanks Tim. That's the paint sorted. I appreciate the info.
I had a 818.302 engine in the car when I bought it. The original 818.303 engine also came with the car, but in pieces. I have rebuilt the 303 as the block had been sleeved to original spec and the 303 head has bigger valves than the 302 (more efficient apparently). I had to mix the pistons to get a good set. Some from the 302 and others from the 303. My understanding was that the 302 pistons were the same as the 303. So that should be fine.

Is there any info on minimum head thickness. Maybe the head has been skimmed too many times.

I did notice that the valve cutout on one of the pistons was slightly damaged, but was told that it was acceptable I think it was #4 cylinder (top left in the photo). I have been uneasy about the timing and redone it using all the methods that you all posted on the forum, but still this "ping/twang" noise persisted. I'm wondering if I should take it apart and check everything again.
Will I be able to reuse the head gasket, which has never been run before


* IMG_3165.jpg (284.84 KB, 960x1280 - viewed 7 times.)
« Last Edit: 08 September, 2021, 07:55:26 AM by Keithver » Logged
davidwheeler
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Posts: 1238



« Reply #76 on: 09 September, 2021, 08:44:26 AM »

I think I would enlarge the round holes to fit.  The oval is near enough.
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David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
nistri
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Posts: 387


« Reply #77 on: 09 September, 2021, 12:07:32 PM »

Just a thought: the valve timing can be out if you timed the system for a 303 engine and you have a 302 engine. Note that the max valve lift is substantially different in these two cases, Andrea
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Andrea Nistri

Ardea S2
Appia S2
Fulvia GTE
Fulvia Sport 1.3 S
Fulvia Montecarlo
Fulvia Coupe 1.3 S
lancialulu
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Posts: 4328



« Reply #78 on: 09 September, 2021, 02:33:47 PM »

Hate to say it but the 303 and 302 pistons have subtly different domes with 303 having higher compression ratios. I think you will need to go through it all again.
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
Keithver
Member
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Posts: 53



« Reply #79 on: 10 September, 2021, 04:15:57 PM »

Success and happiness Grin. I have got rid of the engine noise (twang). I got down on my knees (no, not to pray) to listen to at the sump while I turned the motor. Sure enough it seemed to come from there. On taking the sump off I found that the 6 lock plates that hold the crank casing where making the knocking sound. I had bent the tabs up against the bolt faces, but I hadn't squeezed the plates completely up to the housing sides. Hey presto! the noise has gone
Andrea - the engine is all 303
Tim - If there are a combo of 303 and 302 pistons, does that mean that the compression on the 302 pistons will be lower than the others. Is that a problem, or are there other things that I'm missing
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lancialulu
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« Reply #80 on: 10 September, 2021, 08:03:33 PM »

Tim - If there are a combo of 303 and 302 pistons, does that mean that the compression on the 302 pistons will be lower than the others. Is that a problem, or are there other things that I'm missing
not ideal! 302 engines are 9.0 cr and 303 are 9.5 due to piston crown….
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
Keithver
Member
****
Posts: 53



« Reply #81 on: 15 September, 2021, 08:43:17 AM »

Hi Tim. Sorry for only replying now. I don't seem to get email notifications anymore.
How bad will it be running the engine like this and will it cause damage. Will it just have slightly less power?
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lancialulu
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« Reply #82 on: 15 September, 2021, 02:11:10 PM »

I cannot say definitively yes to your questions but I would recommend you  build it with the correct set of pistons.
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
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